WO2015180452A1 - 拍摄方法和装置 - Google Patents

拍摄方法和装置 Download PDF

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Publication number
WO2015180452A1
WO2015180452A1 PCT/CN2014/093958 CN2014093958W WO2015180452A1 WO 2015180452 A1 WO2015180452 A1 WO 2015180452A1 CN 2014093958 W CN2014093958 W CN 2014093958W WO 2015180452 A1 WO2015180452 A1 WO 2015180452A1
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Prior art keywords
image
shooting
photographing
composite
composite image
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PCT/CN2014/093958
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English (en)
French (fr)
Inventor
魏强
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Nubia Technology Co Ltd
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Nubia Technology Co Ltd
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Priority to ES14893292T priority Critical patent/ES2749626T3/es
Priority to EP14893292.4A priority patent/EP3142351B1/en
Priority to US15/314,472 priority patent/US10194088B2/en
Publication of WO2015180452A1 publication Critical patent/WO2015180452A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/2621—Cameras specially adapted for the electronic generation of special effects during image pickup, e.g. digital cameras, camcorders, video cameras having integrated special effects capability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/62—Control of parameters via user interfaces
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/2625—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects for obtaining an image which is composed of images from a temporal image sequence, e.g. for a stroboscopic effect
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265—Mixing

Definitions

  • the present invention relates to the field of camera technology, and in particular, to a photographing method and apparatus.
  • the existing shooting device has added a light-painting shooting mode, and the user can create a light-painting image through the light-painting shooting mode to take pictures with artistic effects.
  • the photographing device continuously collects the image, and superimposes the currently acquired image with the past image to synthesize a new image.
  • the synthesized new image is used as the base image for the next synthesis, and so on, and finally the light is drawn. All the highlights drawn by the pen are recorded to form a light painting work.
  • the main object of the present invention is to provide a photographing method and apparatus, which aim to realize real-time modification of a photo-painting image during shooting, and improve the photo-photographing effect.
  • the present invention provides a photographing method comprising the steps of:
  • the image is acquired, the currently acquired image and the current base image are combined into a composite image, and the composite image is used as a base image for the next synthesis;
  • the corresponding composite image is extracted from the cached composite image as the current base image, so that the shooting progress is returned to the shooting state displayed by the extracted composite image.
  • the invention provides a photographing method comprising the steps of:
  • the invention also proposes a photographing method comprising the steps of:
  • the image is acquired, the currently acquired image and the current base image are combined into a composite image, and the composite image is used as a base image for the next synthesis;
  • the corresponding composite image is extracted from the cached composite image as the current base image, so that the shooting progress is returned to the shooting state displayed by the extracted composite image.
  • the composite image synthesized during the buffer shooting process comprises:
  • the currently synthesized composite image is cached every preset time during shooting.
  • the composite image synthesized during the buffering process includes: when the brightness of the currently collected image is less than a threshold value detected during shooting, the currently synthesized composite image is buffered once.
  • the threshold is a preset ratio of the maximum brightness that the image format can represent.
  • the step of selecting one of the cached composite images as the current base image further comprises: pausing the shooting.
  • the method further comprises: loading a picture as the current base image.
  • the step of synthesizing the currently acquired image and the current base image into a composite image further comprises: determining an initial base image.
  • the determining an initial base image comprises: loading a picture as an initial base image, or using the acquired first image as an initial base image.
  • the method further comprises: after the end of the shooting, saving the currently displayed composite image, and deleting all the synthesized images of the cache.
  • the operation instruction includes a sliding operation of the user on the screen, or an operation of the virtual button or progress bar displayed on the screen by the user.
  • the invention also provides a photographing device, which comprises an image acquisition module, an image processing module, a display module and a cache module, wherein:
  • An image acquisition module configured to acquire an image
  • the image processing module is configured to synthesize the currently acquired image and the current base image into a composite image, and use the composite image as a base image for the next synthesis; and cache the composite image synthesized during the shooting process in the cache module; Extracting, according to an operation instruction of the user, a corresponding composite image from the cache module as a current base image, so that the shooting progress is returned to the shooting state displayed by the extracted composite image;
  • the display module is set to display the composite image in real time.
  • the image processing module is configured to:
  • the currently synthesized composite image is buffered to the cache module every preset time during shooting.
  • the image processing module is configured to buffer the currently synthesized composite image to the cache module when the brightness of the currently collected image is less than a threshold value during shooting.
  • the threshold is a preset ratio of the maximum brightness that the image format can represent.
  • a control module is further provided that is arranged to control the start, pause and end of the photographing process.
  • the image processing module is further configured to: load a picture as the current base image.
  • the image processing module is further configured to: determine an initial base image.
  • the image processing module is configured to: load a picture as an initial base image, or use the acquired first image as an initial base image.
  • a storage module is further provided, the storage module being configured to save the currently displayed composite image as a final captured image when the shooting ends.
  • the image processing module is further configured to: when the shooting ends, delete all the composite images cached in the cache module.
  • the operation instruction includes a user's sliding operation on the screen, or a user's operation on a virtual button or a progress bar displayed on the screen.
  • the invention provides a photographing method, by buffering part or all of the composite image generated during the photographing process, and when the user performs the retracting operation, extracting the corresponding synthesizing from the cached composite image according to the user's operation instruction.
  • the image is displayed in real time and used as the base image for the next synthesis, which is equivalent to erasing or canceling a certain part of the captured content, realizing the real-time modification of the light-drawn image, so that the user can divide the light painting into multiple times accordingly. Completion, creating more perfect and complex effects, improving the efficiency of light painting creation and creation, and improving the user experience.
  • Figure 1 is a flow chart showing a first embodiment of the photographing method of the present invention
  • FIG. 2 is a schematic view of a photographing interface in the present invention
  • Figure 3 is a flow chart showing a second embodiment of the photographing method of the present invention.
  • Figure 4 is a flow chart showing a third embodiment of the photographing method of the present invention.
  • Figure 5 is another schematic view of the photographing interface in the present invention.
  • Fig. 6 is a block diagram showing the configuration of an embodiment of an image pickup apparatus of the present invention.
  • the photographing method (image processing method) of the present invention is mainly applied to photo-painting shooting, and the user creates a photo-painting by photo-painting, and erases or cancels part of the photographed content in real time during the photo-painting creation process, and returns to the previous shooting. Status to achieve the purpose of modifying the creation of the work in real time.
  • the photographing method includes the following steps:
  • Step S101 acquiring an image
  • the camera After the user clicks or presses the capture button, the camera starts to take a photo shoot and continuously captures the image through the camera.
  • Step S102 synthesize the currently acquired image and the current base image into a composite image for real-time display, and use the composite image as a base image for the next synthesis.
  • the photographing device continuously reads the acquired image, performs image synthesis in real time, and displays the synthesized image in real time.
  • synthesizing the first composite image an initial base image needs to be determined, the mobile terminal can load a picture as an initial base image, and the first image acquired can also be used as an initial base image.
  • the first image is generated at the beginning of the shooting, no base image is synthesized with the currently acquired image.
  • the second image is generated, the first image is used as the initial base image, and the currently acquired image is synthesized to generate the second image, and so on, with the N-1th image as the base image and the current image.
  • the acquired images are combined into an Nth image.
  • each image of the composite is displayed in real time on the screen, and the user can view his own creation effect in real time.
  • the user can load a picture as a base image at any time before the start of shooting or during shooting to perform image synthesis.
  • the user loads a background image from the local storage as the initial base image.
  • the camera will capture the currently acquired image with the current base image (the initial base image, ie loaded)
  • the picture is synthesized into the first composite image, and the composite image is used as a base image for synthesizing the second composite image and displayed in real time.
  • the creation of light painting can be drawn on a more beautiful background, and a richer picture of light painting can be created.
  • Step S103 buffering the currently synthesized composite image every preset time
  • the photographing device can buffer the currently synthesized composite image every 5S, and when the photo-painting creation proceeds to 31S, the photographing device buffers six composite images, which are synthesized in 5S, 10S, 15S, 20S, 25S, and 30S, respectively. Composite image.
  • Step S104 Extract the corresponding composite image from the cached composite image as the current base image according to the operation instruction of the user, so that the shooting progress is returned to the shooting state displayed by the extracted composite image.
  • the user can perform a rollback (or erase, undo) operation. Specifically, the user can slide the left and right directly on the screen to issue an operation instruction. If the user slides to the left once on the screen, the camera returns to the previous progress, that is, returns to the previously buffered composite image, and the composite image is extracted as the current base image for real-time display, if the user views the current base image. Still not satisfied, you can continue to swipe left to return to the previous progress; you can also swipe to the right to resume the previous undo progress; so repeat until you are satisfied. Alternatively, the photographing device may determine the progress length of the return based on the length of the user sliding on the screen.
  • the photographing device can also display a virtual button for advancing and rewinding as shown in FIG. 2, in which the left side is a back button and the right side is a forward button.
  • the user issues an operation command by clicking the forward or back button. If the user clicks the back button once, the camera will roll back the progress once, and click the forward button once to resume the previous undo progress.
  • the composite image buffered by the camera is cached once every 5 seconds.
  • the user releases the operation command to retract once, and the shooting device extracts the composite image buffered at 20S and displays it in real time.
  • the shooting progress is equivalent to returning to the shooting state when the shooting is performed until 20S, and the 20S is cancelled.
  • the light drawing content between the 22S; when the user continues to retreat, return to the shooting state when the shooting is performed to 15S, and the light drawing content between 15S and 22S is cancelled.
  • the rollback ends and the user continues to start light
  • the imaging device uses the composite image at 15S as the base image to perform the next image synthesis.
  • the shooting process is suspended when the user performs the retracting operation.
  • the photographing device can automatically suspend shooting when it detects that the user touches or taps the screen during shooting; when the user double-clicks the screen or stops touching the screen for a certain period of time, the shooting starts automatically. Or the user pauses or continues shooting by clicking the pause/shoot button in the middle of Figure 2.
  • Step S105 After the shooting ends, save the currently displayed composite image, and delete the cached composite image.
  • the photographing device saves the composite image currently displayed on the screen as the final captured image, and deletes all the composite images that are cached to make room for the next shot.
  • the currently displayed composite image may be the currently synthesized composite image, or may be a composite image extracted from the composite image (ie, the user ends the shooting after performing the retracting operation).
  • the corresponding composite image is extracted from the cached composite image and displayed in real time according to the user's operation instruction, and is used as the next synthesis.
  • the basic image is equivalent to erasing or canceling a part of the captured content, realizing the real-time modification of the light-drawn image, so that the user can divide the light-painting into multiple times to create a more perfect and complicated effect. Improve the creative effect and creative efficiency of light painting.
  • the photographing method includes the following steps:
  • Step S201 acquiring an image
  • Step S202 synthesize the currently acquired image and the current base image into a composite image for real-time display, and use the composite image as a base image for the next synthesis.
  • Step S203 When detecting that the brightness of the currently collected image is less than the threshold, buffering the currently synthesized composite image
  • the composite image is cached once, so that the latter composite image is synthesized than the previous one.
  • the image has a lot of light painting content.
  • the light painting “pen” is actually a beam of light, and its brightness is greater than the brightness of the background image.
  • the block area in the image acquired at this time is bright, otherwise all areas are almost black.
  • a buffer is performed, so that one step can be cancelled each time, and one stroke corresponding to the unpainted light is cancelled.
  • the stylus may be any object capable of illuminating.
  • the threshold can be set to a maximum value of the brightness or a maximum brightness of the image format, such as 10%.
  • the maximum brightness that is, the upper limit value of any color value that can be expressed by the image format, such as a general color expression range of 0 to 255. If the photographing device detects that the brightness of any area in the currently acquired image (such as a pixel block of 3 ⁇ 3) exceeds the threshold, it is considered that the light drawing is being performed; otherwise, it is considered that the current drawing is not in the stroke interval, and the current time is cached. Synthetic composite image.
  • Step S204 Extract the corresponding composite image from the cached composite image as the current base image according to the operation instruction of the user, so that the shooting progress is returned to the shooting state displayed by the extracted composite image.
  • Step S205 After the shooting ends, save the currently displayed composite image, and delete the cached composite image.
  • the composite image is cached once by each drawing, and when the user performs the rewinding operation, one piece of the light drawing content can be revoked at one time, which is convenient for the user to make a one-time modification.
  • the photographing method includes the following steps:
  • Step S301 acquiring an image
  • Step S302 synthesize the currently acquired image and the current base image into a composite image for real-time display, and use the composite image as a base image for the next synthesis.
  • Step S303 Continuously buffering all the composite images synthesized during the shooting process
  • all the composite images generated during the shooting process are cached. Since the buffered data is large, the storage space of the imaging device is highly required, and the shooting duration is limited by the storage space.
  • Step S304 Extract the corresponding composite image from the cached composite image as the current base image according to the operation instruction of the user, so that the shooting progress is returned to the shooting state displayed by the extracted composite image.
  • the retracting operation can be performed in the manner of the first embodiment.
  • the progress bar may be dragged left and right like the progress of the video playback.
  • the shooting device may select the cached composite image according to the progress of the progress bar.
  • Step S305 After the shooting ends, save the currently displayed composite image, and delete the cached composite image.
  • the present embodiment allows the user to fall back to any previous shooting progress, and can achieve more elaborate modifications and improve the creative effect.
  • the cached composite image is not automatically deleted, and the user decides to store part or all of the composite image, or delete all the composite images.
  • the photographing apparatus includes a control module, an image acquisition module, an image processing module, a cache module, a storage module, and a display module, and the image processing module and the image respectively
  • the acquisition module, the cache module, the storage module and the display module are connected, and the control module is connected to the image acquisition module.
  • Control Module Set to control the start, pause, and end of the shooting process. Specifically, the control module controls the entire shooting process by controlling the image acquisition module to start, pause, and end the captured image. When the control module controls the image acquisition module to pause the acquisition of images, the image processing module also automatically stops image synthesis.
  • Image Acquisition Module Set to capture images through the camera during shooting.
  • the image processing module is configured to synthesize the currently acquired image and the current base image into a composite image, and use the composite image as a base image for the next synthesis; cache the composite image synthesized during the shooting process in the cache module;
  • the operation instruction performs a rollback operation, and extracts the corresponding composite image from the cache module as the current base image, so that the shooting progress is returned to the shooting state displayed by the extracted composite image; after the shooting ends, the current display on the screen is displayed.
  • the composite image is stored in a storage module.
  • the image processing module When synthesizing the first composite image, the image processing module needs to determine an initial base image, and the image processing module may load a picture as an initial base image, or may use the acquired first image as an initial base image.
  • the image processing module reads the acquired image from the image acquisition module in real time or timing, and performs image synthesis in real time, and sends the synthesized image to the display module for real-time display, and simultaneously uses the composite image as the next synthesis.
  • the base image usually, when the first image is generated at the beginning of the shooting, no base image is synthesized with the currently acquired image.
  • the image processing module uses the first image as an initial base image, combines with the currently acquired image to generate the second image, and so on, based on the N-1th image. The image is combined with the currently acquired image into an Nth image.
  • each image of the composite is displayed in real time on the screen, and the user can view his own creation effect in real time.
  • the image processing module can load any one of the pictures as a basic image at any time according to the user's operation, to perform image synthesis.
  • the image processing module loads a background image from the local storage as the initial base image, and after starting the shooting, the current captured image and the current base image (the initial base image, ie, loading)
  • the picture is synthesized into the first composite image, and the composite image is used as a base image for synthesizing the second composite image and displayed in real time.
  • the creation of light painting can be drawn on a more beautiful background, and a richer picture of light painting can be created.
  • the currently synthesized composite image may be buffered to the cache module at a preset time.
  • the image is retracted for at least a preset time. Light painting content. Specifically, as described in the foregoing first embodiment of the shooting method, details are not described herein again.
  • the image processing module may also cache the currently synthesized composite image to the cache module when the brightness of the currently collected image is less than the threshold, that is, each time a stroke is drawn, the cache is cached; when the rollback operation is performed, each time the rollback operation is performed, A piece of light painted content. Specifically, as described in the foregoing second embodiment of the shooting method, details are not described herein again.
  • the image processing module can also continuously cache all the composite images synthesized during the shooting process to the cache module.
  • the rollback operation When the rollback operation is performed, it can be rolled back to any previous shooting progress to achieve the most detailed fallback. Specifically, as described in the third embodiment of the foregoing shooting method, details are not described herein again.
  • the control module controls the shooting process. time out.
  • the control module can automatically pause the shooting when it detects that the user touches or taps the screen during the shooting process; when the user double-clicks the screen or does not touch the screen for a certain period of time, the shooting starts automatically. Or the user issues a pause or shooting command by clicking the pause/shoot button shown in FIG. 2, and the control module accordingly controls the pause or resume of the shooting process.
  • Display module Set to display the composite image generated by the image processing module in real time.
  • Memory module Set to save the composite image currently displayed on the screen as the final captured image at the end of shooting.
  • the composite image currently displayed may be the currently synthesized composite image, or may be a certain composite image extracted from the composite image (ie, the user ends the shooting after performing the retracting operation).
  • the image processing module can delete all the composite images in the cache module to make room for the next shot. It is also possible not to automatically delete the cached composite picture, and the user decides to store some or all of the composite image, or delete all the composite images.
  • the shooting process may also be paused, but proceed.
  • the photographing apparatus of the present invention caches part or all of the composite image generated during the photographing process, and when the user performs the retracting operation, extracts the corresponding composite image from the cached composite image according to the user's operation instruction. Displayed in real time and used as the base image for the next synthesis, which is equivalent to erasing or canceling a certain part of the captured content, realizing the real-time modification of the light-drawn image, so that the user can divide the light painting into multiple times accordingly. Create more perfect and complex effects, improve the creation and creation efficiency of light painting, and enhance the user experience.
  • the imaging device provided by the above embodiment is exemplified by the division of the above functional modules.
  • the function distribution may be completed by different functional modules as needed.
  • the internal structure of the camera is divided into different functional modules to perform all or part of the functions described above.
  • the imaging device provided by the foregoing embodiment is the same as the embodiment of the imaging method, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.
  • the photographing method and apparatus of the present invention caches part or all of the composite image generated during the photographing process when the photographing is performed, and when the user performs the retracting operation, according to the user's operation instruction, from the cached composite image
  • the corresponding composite image is extracted and displayed in real time, and is used as the base image for the next synthesis, which is equivalent to erasing or canceling a certain part of the captured content, realizing the real-time modification of the light-drawn image, so that the user can light the light accordingly.
  • the paintings are completed many times, creating more perfect and complex effects, improving the light painting creation effect and creation efficiency, and improving the user experience.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Processing Or Creating Images (AREA)
  • Studio Devices (AREA)
  • Image Processing (AREA)

Abstract

本发明公开了一种拍摄方法和装置，所述拍摄方法包括步骤：在拍摄过程中，采集图像，将当前采集到的图像与当前的基础图像合成为合成图像，并将该合成图像作为下一次合成的基础图像；缓存拍摄过程中合成的合成图像；根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态。从而，相当于擦除或撤销了拍摄的某一部分内容，实现了对光绘图像的实时修改，使得用户可以据此把一次光绘分作多次完成，创作出更加完美和复杂的效果，提高了光绘创作效果，提升了用户体验。

Description

拍摄方法和装置 技术领域
本发明涉及摄像技术领域，尤其是涉及一种拍摄方法和装置。
背景技术
随着摄像技术的快速发展，现有的拍摄装置新增了一种光绘拍摄模式，用户可以通过光绘拍摄模式进行光绘创作，拍摄出具有艺术效果的图片。光绘拍摄时，拍摄装置持续采集图像，并将当前采集到的图像与过去的图像进行叠加来合成新的图像，合成的新图像又作为下一次合成的基础图像，依次类推，最终把光绘笔绘制的所有亮点记录下来，形成光绘作品。
然而，现有技术中在进行光绘拍摄时，只能进行开始和结束的控制，拍摄过程不能暂停，必须一气呵成的完成一次光绘拍摄；拍摄过程中不能对拍摄的光绘图像进行实时修改，若对光绘图像的某一部分不满意，只能从头再来，重新进行绘制。从而导致光绘拍摄效果不佳，创作效率较低。
发明内容
本发明的主要目的在于提供一种拍摄方法和装置，旨在实现在拍摄过程中对光绘图像进行实时修改，提高光绘拍摄效果。
为达以上目的，本发明提出一种拍摄方法，包括步骤：
在拍摄过程中，采集图像，将当前采集到的图像与当前的基础图像合成为合成图像，并将该合成图像作为下一次合成的基础图像；
检测到当前采集到的图像的亮度小于阈值时，缓存一次当前合成的合成图像；
根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态。
本发明提出一种拍摄方法，包括步骤：
本发明还提出一种拍摄方法，包括步骤：
在拍摄过程中，采集图像，将当前采集到的图像与当前的基础图像合成为合成图像，并将该合成图像作为下一次合成的基础图像；
缓存拍摄过程中合成的合成图像；
根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态。
优选地，所述缓存拍摄过程中合成的合成图像包括：
连续缓存拍摄过程中合成的所有合成图像，或
拍摄过程中每隔预设时间缓存一次当前合成的合成图像。
优选地，所述缓存拍摄过程中合成的合成图像包括：拍摄过程中检测到当前采集到的图像的亮度小于阈值时，缓存一次当前合成的合成图像。
优选地，所述阈值为图像格式所能表示的最大亮度的预设比例。
优选地，所述从缓存的合成图像中选择一张作为当前的基础图像的步骤之前还包括：暂停拍摄。
优选地，所述方法还包括：加载一张图片作为当前的基础图像。
优选地，所述将当前采集到的图像与当前的基础图像合成为合成图像的步骤之前还包括：确定一初始基础图像。
优选地，所述确定一初始基础图像包括：加载一张图片作为初始基础图像，或将采集到的第一张图像作为初始基础图像。
优选地，所述方法还包括：拍摄结束后，保存当前显示的合成图像，删除缓存的所有合成图像。
优选地，，所述操作指令包括用户在屏幕上的滑动操作，或者用户对屏幕上显示的虚拟按钮或进度条的操作。
本发明同时提出一种拍摄装置，包括图像采集模块、图像处理模块、显示模块和缓存模块，其中：
图像采集模块，设置为采集图像；
图像处理模块，设置为将当前采集到的图像与当前的基础图像合成为合成图像，并将该合成图像作为下一次合成的基础图像；将拍摄过程中合成的合成图像缓存于所述缓存模块；根据用户的操作指令，从所述缓存模块中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态；
显示模块，设置为实时显示合成图像。
优选地，所述图像处理模块设置为：
连续缓存拍摄过程中合成的所有合成图像至所述缓存模块，或
拍摄过程中每隔预设时间缓存一次当前合成的合成图像至所述缓存模块。
优选地，所述图像处理模块设置为：拍摄过程中检测到当前采集到的图像的亮度小于阈值时，缓存一次当前合成的合成图像至所述缓存模块。
优选地，所述阈值为图像格式所能表示的最大亮度的预设比例。
优选地，还包括控制模块，其设置为控制拍摄过程的开始、暂停和结束。
优选地，所述图像处理模块还设置为：加载一张图片作为当前的基础图像。
优选地，所述图像处理模块还设置为：确定一初始基础图像。
优选地，所述图像处理模块设置为：加载一张图片作为初始基础图像，或将采集到的第一张图像作为初始基础图像。
优选地，还包括存储模块，所述存储模块设置为：拍摄结束时，将当前显示的合成图像作为最终的拍摄图像予以保存。
优选地，所述图像处理模块还设置为：拍摄结束时，删除所述缓存模块中缓存的所有合成图像。
优选地，所述操作指令包括用户在屏幕上的滑动操作，或者用户对屏幕上显示的虚拟按钮或进度条的操作。
本发明所提供的一种拍摄方法，通过将拍摄过程中生成的部分或全部合成图像予以缓存，当用户进行回退操作时，根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像予以实时显示，并作为下一次合成的基础图像，相当于擦除或撤销了拍摄的某一部分内容，实现了对光绘图像的实时修改，使得用户可以据此把一次光绘分作多次完成，创作出更加完美和复杂的效果，提高了光绘创作效果和创作效率，提升了用户体验。
附图说明
图1是本发明的拍摄方法第一实施例的流程图；
图2是本发明中拍摄界面一示意图；
图3是本发明的拍摄方法第二实施例的流程图；
图4是本发明的拍摄方法第三实施例的流程图；
图5是本发明中拍摄界面另一示意图；
图6是本发明的拍摄装置一实施例的结构框图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明的拍摄方法(图像处理方法)主要应用于光绘拍摄，用户通过光绘拍摄进行光绘创作，并在光绘创作过程中实时擦除或撤销已拍摄的部分内容，返回到之前的拍摄状态，以实现实时修改创作作品的目的。
参见图1，提出本发明的拍摄方法第一实施例，所述拍摄方法包括以下步骤:
步骤S101：采集图像
用户点击或按下拍摄按钮后，拍摄装置开始进行光绘拍摄，通过摄像头持续采集图像。
步骤S102：将当前采集到的图像与当前的基础图像合成为合成图像予以实时显示，并将该合成图像作为下一次合成的基础图像
拍摄装置持续读取采集到的图像，实时进行图像合成，并将合成的图像进行实时显示。在合成第一张合成图像时，需确定一初始基础图像，移动终端可加载一张图片作为初始基础图像，也可以将采集到的第一张图像作为初始基础图像。
通常，在拍摄刚开始瞬间生成第一张图像时，并没有基础图像与当前采集到的图像进行合成。当生成第二张图像时，才将第一张图像作为初始基础图像，与当前采集到的图像进行合成而生成该第二张图像，依次类推，以第N-1张图像作为基础图像与当前采集到的图像合成为第N张图像。同时，屏幕上实时显示合成的每一张图像，用户就可以实时查看自己的创作效果。
优选的，在拍摄开始前或拍摄过程中，用户可以随时加载一张图片作为基础图像，以进行图像合成。例如，在拍摄开始前，用户从本地存储中加载一张有背景的图片作为初始基础图像，在开始拍摄后，拍摄装置将当前采集到的图像与当前的基础图像(初始基础图像，即加载的图片)合成为第一张合成图像，并将该合成图像作为合成第二张合成图像的基础图像并实时显示。从而，光绘创作就可以在一个更加绚丽的背景上进行绘制，可以创作出更加丰富的光绘图片。
步骤S103：每隔预设时间缓存一次当前合成的合成图像
例如，拍摄装置可以每隔5S缓存一次当前合成的合成图像，当光绘创作进行到31S时，拍摄装置则缓存了6张合成图像，分别为5S、10S、15S、20S、25S、30S时合成的合成图像。
步骤S104：根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态
在拍摄过程中，用户可以进行回退(或称擦除、撤销)操作。具体的，用户可以直接在屏幕上左右滑动来发布操作指令。如用户在屏幕上向左滑动一次，拍摄装置则返回到前一个进度，即返回至前一次缓存的合成图像，提取出该合成图像作为当前的基础图像予以实时显示，如果用户对当前的基础图像还不满意，还可以继续向左滑动返回至更前的进度；也可以向右滑动恢复之前撤销的进度；如此反复，直到满意为止。或者，拍摄装置也可以根据用户在屏幕上滑动的长度来确定返回的进度长度。
拍摄装置也可以如图2所示显示前进和回退的虚拟按钮，图中左侧为回退按钮，右侧为前进按钮。用户通过点击前进或回退按钮来发布操作指令。如用户点击一次回退按钮，拍摄装置则回退一次进度，点击一次前进按钮，则恢复之前撤销的进度。
例如，拍摄装置缓存的合成图像为每5S缓存一次。当拍摄进行22S后，用户发布操作指令回退一次，拍摄装置则提取出20S时缓存的合成图像并予以实时显示，拍摄进度就相当于返回到拍摄进行到20S时的拍摄状态，撤销了20S～22S之间的光绘内容；当用户继续回退，则返回到拍摄进行到15S时的拍摄状态，撤销了15S～22S之间的光绘内容。回退结束，用户继续开始光 绘拍摄，拍摄装置则以15S时的合成图像作为基础图像，进行下一次图像的合成。
优选的，当用户在进行回退操作时，拍摄过程暂停。拍摄装置可以在检测到用户在拍摄过程中触摸或点击屏幕时，自动暂停拍摄；当用户双击屏幕或一定时间内不再触摸屏幕时，自动开始继续拍摄。或者用户通过点击图2中部的暂停/拍摄按钮来暂停拍摄或继续拍摄。
步骤S105：拍摄结束后，保存当前显示的合成图像，删除缓存的合成图像
当用户结束拍摄时，拍摄装置将屏幕上当前显示的合成图像作为最终的拍摄图像保存起来，并将缓存的所有合成图像予以删除，以为下次拍摄腾出缓存空间。当前显示的合成图像可能是当前合成的合成图像，也可能是从合成图像中提取出的某一张合成图像(即用户进行回退操作后则结束拍摄)。
从而，通过将拍摄过程中生成的合成图像予以缓存，当用户进行回退操作时，根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像予以实时显示，并作为下一次合成的基础图像，相当于擦除或撤销了拍摄的某一部分内容，实现了对光绘图像的实时修改，使得用户可以据此把一次光绘分作多次完成，创作出更加完美和复杂的效果，提高了光绘创作效果和创作效率。
参见图3，提出本发明的拍摄方法第二实施例，所述拍摄方法包括以下步骤：
步骤S201：采集图像
步骤S202：将当前采集到的图像与当前的基础图像合成为合成图像予以实时显示，并将该合成图像作为下一次合成的基础图像
步骤S203：检测到当前采集到的图像的亮度小于阈值时，缓存一次当前合成的合成图像
用户在进行光绘创作时，与传统的绘画一样，会一笔一笔的绘制，本实施例在用户每绘制一笔，则缓存一次合成图像，从而后一张合成图像均比前一张合成图像多一笔光绘内容。
具体实现上，考虑到光绘拍摄是在黑暗背景下进行的，光绘“笔”实际上是一束亮光，其亮度比背景图像的亮度要大，在光绘过程中，如果正在进 行绘制，则此时采集的图像中有块状区域是明亮的，否则所有区域都近似黑色的。当采集到的图像亮度比较暗时(此时说明绘画的一笔结束，或者没有绘画)，即小于阈值，则进行一次缓存，这样就可以实现每往前撤销一步，对应撤销光绘的一个笔画的内容。所述光绘笔可以是能够发光的任何物体。
由于光绘时亮与黑的差别很明显，因此可以将阈值设定为图像格式所能表示的亮度最大值或者最大亮度的一定比例，如10％。所述最大亮度即图像格式所能表达的任意颜色数值的上限值，比如一般颜色表达的范围为0～255。如果拍摄装置检测到当前采集的图像中任一区域(如3X3的像素块)的亮度超过阈值，则认为正在进行光绘绘制；否则，认为当前没有绘制，处在笔画间隔中，则缓存一次当前合成的合成图像。
步骤S204：根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态
本实施例实现回退操作的方式与第一实施例相同，只不过本实施例中每回退一次，则撤销光绘一个笔画的内容，每前进一次，则恢复刚撤销的一个笔画的内容。
步骤S205：拍摄结束后，保存当前显示的合成图像，删除缓存的合成图像
从而，本实施例通过每绘制一笔则缓存一次合成图像，当用户进行回退操作时，则可以一次撤销一笔光绘内容，方便用户一笔一笔的修改。
参见图4，提出本发明的拍摄方法第三实施例，所述拍摄方法包括以下步骤：
步骤S301：采集图像
步骤S302：将当前采集到的图像与当前的基础图像合成为合成图像予以实时显示，并将该合成图像作为下一次合成的基础图像
步骤S303：连续缓存拍摄过程中合成的所有合成图像
本实施例中，将拍摄过程中生成的所有合成图像都予以缓存，由于缓存的数据较大，因此对拍摄装置的存储空间有较高的要求，拍摄时长受限于存储空间。
步骤S304：根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态
由于本实施例将所有合成图像均予以缓存，因此在进行回退操作时，可以实现最为精细的回退。
回退操作时，可以以第一实施例的方式进行。也可以如图5所示，像调节视频播放进度一样左右拖动进度条即可，这时拍摄装置根据进度条的进度，对应的选择出缓存的合成图像即可。
步骤S305：拍摄结束后，保存当前显示的合成图像，删除缓存的合成图像
从而，本实施例允许用户回退到之前的任意拍摄进度，可以实现更为精细的修改，提高了创作效果。
在某些实施例中，如果拍摄装置的存储空间较大，拍摄结束后，不自动删除缓存的合成图片，由用户决定存储部分或全部合成图像，或者删除所有的合成图片。
参见图6，提出本发明的拍摄装置(图像处理装置)一实施例，所述拍摄装置包括控制模块、图像采集模块、图像处理模块、缓存模块、存储模块和显示模块，图像处理模块分别与图像采集模块、缓存模块、存储模块和显示模块连接，控制模块与图像采集模块连接。
控制模块：设置为控制拍摄过程的开始、暂停和结束。具体的，控制模块通过控制图像采集模块开始、暂停和结束采集图像，来控制整个拍摄过程。当控制模块控制图像采集模块暂停采集图像时，图像处理模块也自动停止图像合成。
图像采集模块：设置为在拍摄过程中，通过摄像头采集图像。
图像处理模块：设置为将当前采集到的图像与当前的基础图像合成为合成图像，并将该合成图像作为下一次合成的基础图像；将拍摄过程中合成的合成图像缓存于缓存模块；根据用户的操作指令进行回退操作，从缓存模块中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态；拍摄结束后，将屏幕上当前显示的合成图像存储于存储模块。
在合成第一张合成图像时，图像处理模块需确定一初始基础图像，图像处理模块可加载一张图片作为初始基础图像，也可以将采集到的第一张图像作为初始基础图像。
具体的，图像处理模块实时或定时的从图像采集模块中读取采集到的图像，并实时进行图像合成，并将合成的图像发送给显示模块予以实时显示，同时将该合成图像作为下一次合成的基础图像。通常，在拍摄刚开始瞬间生成第一张图像时，并没有基础图像与当前采集到的图像进行合成。当生成第二张图像时，图像处理模块才将第一张图像作为初始基础图像，与当前采集到的图像进行合成而生成该第二张图像，依次类推，以第N-1张图像作为基础图像与当前采集到的图像合成为第N张图像。同时，屏幕上实时显示合成的每一张图像，用户就可以实时查看自己的创作效果。
优选的，在拍摄开始前或拍摄过程中，图像处理模块可以根据用户操作随时加载任意一张图片作为基础图像，以进行图像合成。例如，在拍摄开始前，图像处理模块从本地存储中加载一张有背景的图片作为初始基础图像，在开始拍摄后，则将当前采集到的图像与当前的基础图像(初始基础图像，即加载的图片)合成为第一张合成图像，并将该合成图像作为合成第二张合成图像的基础图像并实时显示。从而，光绘创作就可以在一个更加绚丽的背景上进行绘制，可以创作出更加丰富的光绘图片。
图像处理模块将拍摄过程中合成的合成图像缓存于缓存模块时，可以每隔预设时间缓存一次当前合成的合成图像至缓存模块，在进行回退操作时，则每次回退至少预设时间的光绘内容。具体如前述拍摄方法第一实施例所述，在此不再赘述。
图像处理模块也可以在检测到当前采集到的图像的亮度小于阈值时，缓存一次当前合成的合成图像至缓存模块，即每绘制一笔，缓存一次；在进行回退操作时，则每次回退一笔的光绘内容。具体如前述拍摄方法第二实施例所述，在此不再赘述。
图像处理模块也可以连续缓存拍摄过程中合成的所有合成图像至缓存模块，在回退操作时，则可以回退到之前的任意拍摄进度，实现最为精细的回退。具体如前述拍摄方法第三实施例所述，在此不再赘述。
优选地，当图像处理模块在进行回退操作时，控制模块则控制拍摄过程 暂停。控制模块可以在检测到用户在拍摄过程中触摸或点击屏幕时，则自动暂停拍摄；当用户双击屏幕或一定时间内不再触摸屏幕时，自动开始继续拍摄。或者用户通过点击图2所示的暂停/拍摄按钮来发布暂停或拍摄指令，控制模块据此控制拍摄过程的暂停或继续。
显示模块：设置为实时显示图像处理模块生成的合成图像。
存储模块：设置为在拍摄结束时，将屏幕上当前显示的合成图像作为最终的拍摄图像予以保存。其中，当前显示的合成图像可能是当前合成的合成图像，也可能是从合成图像中提取出的某一张合成图像(即用户进行回退操作后则结束拍摄)。
当拍摄结束后，图像处理模块可以将缓存模块中的所有合成图像予以删除，以为下次拍摄腾出缓存空间。也可以不自动删除缓存的合成图片，由用户决定存储部分或全部合成图像，或者删除所有的合成图像。
在某些实施例中，当进行回退操作时，拍摄过程也可以不暂停，而是继续进行。
据此，本发明的拍摄装置，通过将拍摄过程中生成的部分或全部合成图像予以缓存，当用户进行回退操作时，根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像予以实时显示，并作为下一次合成的基础图像，相当于擦除或撤销了拍摄的某一部分内容，实现了对光绘图像的实时修改，使得用户可以据此把一次光绘分作多次完成，创作出更加完美和复杂的效果，提高了光绘创作效果和创作效率，提升了用户体验。
需要说明的是：上述实施例提供的拍摄装置在进行光绘拍摄时，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将拍摄装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。另外，上述实施例提供的拍摄装置与拍摄方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
本领域普通技术人员可以理解,实现上述实施例方法中的全部或部分步骤可以通过程序来控制相关的硬件完成，所述的程序可以存储于一计算机可读取存储介质中，所述的存储介质可以是ROM/RAM、磁盘、光盘等。
以上参照附图说明了本发明的优选实施例，并非因此局限本发明的权利 范围。本领域技术人员不脱离本发明的范围和实质，可以有多种变型方案实现本发明，比如作为一个实施例的特征可用于另一实施例而得到又一实施例。凡在运用本发明的技术构思之内所作的任何修改、等同替换和改进，均应在本发明的权利范围之内。
工业适用性
本发明的拍摄方法和装置，在进行光绘拍摄时，通过将拍摄过程中生成的部分或全部合成图像予以缓存，当用户进行回退操作时，根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像予以实时显示，并作为下一次合成的基础图像，相当于擦除或撤销了拍摄的某一部分内容，实现了对光绘图像的实时修改，使得用户可以据此把一次光绘分作多次完成，创作出更加完美和复杂的效果，提高了光绘创作效果和创作效率，提升了用户体验。

Claims (22)

  1. 一种拍摄方法，包括步骤：
    在拍摄过程中，采集图像，将当前采集到的图像与当前的基础图像合成为合成图像，并将该合成图像作为下一次合成的基础图像；
    检测到当前采集到的图像的亮度小于阈值时，缓存一次当前合成的合成图像；
    根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态。
  2. 一种拍摄方法，包括步骤：
    在拍摄过程中，采集图像，将当前采集到的图像与当前的基础图像合成为合成图像，并将该合成图像作为下一次合成的基础图像；
    缓存拍摄过程中合成的合成图像；
    根据用户的操作指令，从缓存的合成图像中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态。
  3. 根据权利要求2所述的拍摄方法，其中，所述缓存拍摄过程中合成的合成图像包括：
    连续缓存拍摄过程中合成的所有合成图像，或
    拍摄过程中每隔预设时间缓存一次当前合成的合成图像。
  4. 根据权利要求2所述的拍摄方法，其中，所述缓存拍摄过程中合成的合成图像包括：拍摄过程中检测到当前采集到的图像的亮度小于阈值时，缓存一次当前合成的合成图像。
  5. 根据权利要求4所述的拍摄方法，其中，所述阈值为图像格式所能表示的最大亮度的预设比例。
  6. 根据权利要求2所述的拍摄方法，其中，所述从缓存的合成图像中选择一张作为当前的基础图像的步骤之前还包括：暂停拍摄。
  7. 根据权利要求2所述的拍摄方法，其中，所述方法还包括：加载一张图片作为当前的基础图像。
  8. 根据权利要求2所述的拍摄方法，其中，所述将当前采集到的图像与当前的基础图像合成为合成图像的步骤之前还包括：确定一初始基础图像。
  9. 根据权利要求8所述的拍摄方法，其中，所述确定一初始基础图像包括：加载一张图片作为初始基础图像，或将采集到的第一张图像作为初始基础图像。
  10. 根据权利要求2所述的拍摄方法，其中，所述方法还包括：拍摄结束后，保存当前显示的合成图像，删除缓存的所有合成图像。
  11. 根据权利要求2所述的拍摄方法，其中，所述操作指令包括用户在屏幕上的滑动操作，或者用户对屏幕上显示的虚拟按钮或进度条的操作。
  12. 一种拍摄装置，包括图像采集模块、图像处理模块、显示模块和缓存模块，其中：
    图像采集模块，设置为采集图像；
    图像处理模块，设置为将当前采集到的图像与当前的基础图像合成为合成图像，并将该合成图像作为下一次合成的基础图像；将拍摄过程中合成的合成图像缓存于所述缓存模块；根据用户的操作指令，从所述缓存模块中提取出相应的合成图像作为当前的基础图像，以使拍摄进度返回到提取的合成图像所显示的拍摄状态；
    显示模块，设置为实时显示合成图像。
  13. 根据权利要求12所述的拍摄装置，其中，所述图像处理模块设置为：
    连续缓存拍摄过程中合成的所有合成图像至所述缓存模块，或
    拍摄过程中每隔预设时间缓存一次当前合成的合成图像至所述缓存模块。
  14. 根据权利要求12所述的拍摄装置，其中，所述图像处理模块设置为：拍摄过程中检测到当前采集到的图像的亮度小于阈值时，缓存一次当前合成的合成图像至所述缓存模块。
  15. 根据权利要求14所述的拍摄方法，其中，所述阈值为图像格式所能表示的最大亮度的预设比例。
  16. 根据权利要求12所述的拍摄装置，其中，还包括控制模块，其设置为控制拍摄过程的开始、暂停和结束。
  17. 根据权利要求12所述的拍摄装置，其中，所述图像处理模块还设置为：加载一张图片作为当前的基础图像。
  18. 根据权利要求12所述的拍摄装置，其中，所述图像处理模块还设置 为：确定一初始基础图像。
  19. 根据权利要求18所述的拍摄装置，其中，所述图像处理模块设置为：加载一张图片作为初始基础图像，或将采集到的第一张图像作为初始基础图像。
  20. 根据权利要求12所述的拍摄装置，其中，还包括存储模块，所述存储模块设置为：拍摄结束时，将当前显示的合成图像作为最终的拍摄图像予以保存。
  21. 根据权利要求12所述的拍摄装置，其中，所述图像处理模块还设置为：拍摄结束时，删除所述缓存模块中缓存的所有合成图像。
  22. 根据权利要求12所述的拍摄装置，其中，所述操作指令包括用户在屏幕上的滑动操作，或者用户对屏幕上显示的虚拟按钮或进度条的操作。
PCT/CN2014/093958 2014-05-29 2014-12-16 拍摄方法和装置 Ceased WO2015180452A1 (zh)

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