WO2020003630A1 - Dispositif de traitement d'image, procédé de traitement d'image, et enregistreur de conduite - Google Patents

Dispositif de traitement d'image, procédé de traitement d'image, et enregistreur de conduite Download PDF

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Publication number
WO2020003630A1
WO2020003630A1 PCT/JP2019/009997 JP2019009997W WO2020003630A1 WO 2020003630 A1 WO2020003630 A1 WO 2020003630A1 JP 2019009997 W JP2019009997 W JP 2019009997W WO 2020003630 A1 WO2020003630 A1 WO 2020003630A1
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WO
WIPO (PCT)
Prior art keywords
image
image processing
vehicle
important part
processing apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/009997
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English (en)
Japanese (ja)
Inventor
勝 徳田
末永　俊之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Car Mate Mfg Co Ltd
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Car Mate Mfg Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Car Mate Mfg Co Ltd filed Critical Car Mate Mfg Co Ltd
Publication of WO2020003630A1 publication Critical patent/WO2020003630A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Definitions

  • the present invention relates to an image processing device, an image processing method, and a drive recorder for recording a driving state or a parking state of a vehicle.
  • a drive recorder that records a driving state or a parking state of a vehicle is used for purposes such as accident analysis, technical confirmation of safe driving, and crime prevention.
  • drive recorders there is one that arranges an omnidirectional camera in a vehicle cabin and acquires an omnidirectional image centered on a vehicle.
  • the conventional spherical drive recorder reduces the amount of data by recording the entire image at a low resolution. For this reason, the image quality deteriorates, and disadvantages such as the inability to see the license plate of the vehicle ahead, which is about 10 meters from the host vehicle, occur.
  • the high-resolution image of the omnidirectional camera capable of shooting at a high resolution has an excessive data amount, generates a large amount of heat during operation, and places a load on the recorder body. Further, an expensive large-capacity memory is required to store high-resolution image data. Also, for example, manufacture a recorder that installs a spherical camera and a high-resolution camera on the recorder body, stores the spherical image and the high-resolution image separately, and combines the high-resolution image with the spherical image by post-processing. In this case, the recorder body becomes expensive because two different types of cameras, a spherical camera and a high-resolution camera, are combined.
  • Patent Document 1 There is also an imaging system of Patent Document 1 in which a spherical image is acquired with a plurality of optical lenses.
  • a coordinate conversion process is performed so that an image centered on a point of interest is arranged in a central portion of the omnidirectional image that is not easily distorted, and an image corresponding to the central portion is cut out and output as a display image.
  • the clipped image is an image that looks natural for the viewer, it simply functions to cut out part of the image and reduce the resolution.Therefore, there is a problem that the license plate of the vehicle ahead in about 10 meters cannot be seen. there were.
  • the problem to be solved by the present invention is to provide an image processing apparatus, an image processing method, and a drive recorder that can easily recognize an important part in an image and reduce a load during operation.
  • the present invention provides, as first means for solving the above-mentioned problems, a photographing means which is installed in a vehicle interior of a vehicle and photographs at least a periphery of the vehicle including a preceding vehicle, and An image processing apparatus comprising: an image quality changing unit that cuts out an important part and reduces the image quality of the captured image; and a storage unit that stores the cut out important part and the captured image whose quality is lowered.
  • An image processing apparatus comprising: an image quality changing unit that cuts out an important part and reduces the image quality of the captured image; and a storage unit that stores the cut out important part and the captured image whose quality is lowered.
  • the present invention as a second means for solving the above problems, a photographing means installed in a vehicle interior of the vehicle and photographing the periphery of the vehicle including at least a vehicle ahead at a high resolution, An image quality changing unit that cuts out an important part in the captured image of the imaging unit at a high resolution and reduces the captured image to a low resolution.
  • An image processing apparatus characterized by having: According to the second means, the important part in the reproduced image can be easily visually recognized, and the load such as heat generation during operation can be reduced.
  • the image capturing means includes a plurality of wide-angle lenses for capturing an image of the celestial sphere centered on the vehicle.
  • An object of the present invention is to provide an image processing apparatus characterized by the above. According to the third means, it is possible to capture an omnidirectional image centered on the own vehicle with one camera, and to reduce the overall cost of the apparatus without using a plurality of different cameras as in the related art. Can be achieved.
  • the present invention provides a method according to any one of the first to third means, wherein the important portion is a range including at least a license plate of the preceding vehicle.
  • An object of the present invention is to provide an image processing apparatus characterized by the following. According to the fourth means, at the time of reproduction, for example, a license plate of a preceding vehicle which is about 10 meters away from the own vehicle can be visually recognized.
  • the image processing apparatus wherein the important portion is a continuous portion in front, side, and rear of the vehicle.
  • An object of the present invention is to provide a processing device. According to the fifth means, at the time of reproduction, the entire periphery around the vehicle including the license plate of the preceding vehicle can be easily visually recognized from the surrounding (panoramic) image of the own vehicle.
  • the image processing apparatus according to any one of the first to fifth aspects, wherein the image quality changing unit determines a size of the important portion based on a position coordinate of an image.
  • Another object of the present invention is to provide an image processing apparatus characterized in that the position can be arbitrarily changed. According to the sixth means, it is possible to easily change the location of the important portion in the image that changes depending on the imaging target.
  • the image quality changing means sets the image quality of the captured image to be stored higher than that of the important part. It is an object of the present invention to provide an image processing apparatus characterized in that the setting can be arbitrarily changed within a range to be dropped. According to the seventh means, it is possible to easily select from a range in which the image quality is lowered according to the specifications (memory capacity and the like) of the apparatus.
  • the present invention provides the image processing apparatus according to any one of the first to seventh means, wherein the important portion is framed when the image processed by the image quality changing means is reproduced.
  • an important portion with good image quality is enlarged and displayed from the reproduced image, and, for example, a license plate of a vehicle ahead of the own vehicle about 10 meters away can be easily visually recognized.
  • a drive recorder including the image processing apparatus according to any one of the first to eighth aspects. According to the ninth means, it is possible to obtain a drive recorder capable of easily recognizing an important part in a reproduced image and reducing a load at the time of storage.
  • the present invention provides a step of recording the periphery of the vehicle including at least a forward vehicle with a photographing means installed in a vehicle cabin, Cutting out an important part in the photographed image of the photographing means, changing the image quality by lowering the image quality of the photographed image, and storing the cut-out important part and the photographed image having a reduced image quality.
  • An object of the present invention is to provide an image processing method characterized by the following. According to the tenth means, an important part in the reproduced image can be easily visually recognized, and the load during operation can be reduced.
  • the amount of data to be processed is reduced, and the heat generation of the recorder main body can be suppressed, so that the load during operation can be reduced. Further, the size of the apparatus main body can be reduced.
  • FIG. 2 is an explanatory diagram 1 of Example 1 of an important part of recorded data.
  • FIG. 3 is an explanatory diagram 2 of Example 1 of an important part of recorded data.
  • FIG. 4 is an explanatory diagram of an important part of the first embodiment.
  • FIG. 11 is an explanatory diagram of a second embodiment of an important part of recorded data of a modified example.
  • FIG. 13 is an explanatory diagram of a second embodiment of an important part of recorded data of a modified example.
  • FIG. 11 is an explanatory diagram 1 of Example 3 of an important part of recorded data in a modified example.
  • FIG. 11 is an explanatory diagram 2 of Example 3 of an important part of recorded data of a modified example.
  • FIG. 13 is an explanatory diagram of Example 3 of an important part of recorded data according to a modified example.
  • FIG. 1 is an explanatory diagram of a drive recorder serving as an image processing device of the present invention.
  • FIG. 2 is an explanatory diagram of an action camera serving as an image processing device of the present invention.
  • FIG. 4 is a flowchart of a recording process performed by the image processing apparatus of the present invention. It is a flowchart of the reproduction
  • FIG. 1 is a block diagram of an image processing apparatus according to the present invention.
  • FIG. 2 is an explanatory diagram 1 of Example 1 of an important part of recorded data.
  • FIG. 3 is an explanatory diagram 2 of the second embodiment of the important part of the recorded data.
  • FIG. 4 is an explanatory diagram of an important part of the first embodiment.
  • FIG. 5 is an explanatory diagram 1 of the second embodiment of the important part of the recorded data of the modified example.
  • FIG. 6 is an explanatory diagram of Example 2 of an important part of recorded data according to a modification.
  • FIG. 1 is a block diagram of an image processing apparatus according to the present invention.
  • FIG. 2 is an explanatory diagram 1 of Example 1 of an important part of recorded data.
  • FIG. 3 is an explanatory diagram 2 of the second embodiment of the important part of the recorded data.
  • FIG. 4 is an explanatory diagram of an important part of the first embodiment.
  • FIG. 5 is an explanatory diagram 1 of the second embodiment of the important part of the
  • FIG. 7 is an explanatory diagram 1 of the third embodiment of the important part of the recorded data of the modified example.
  • FIG. 8 is an explanatory diagram 2 of the third embodiment of the important part of the recorded data of the modified example.
  • FIG. 9 is an explanatory diagram of the third embodiment of the important part of the recorded data of the modified example.
  • FIG. 10 is an explanatory diagram of a drive recorder serving as an image processing device of the present invention.
  • FIG. 11 is an explanatory diagram of an action camera serving as the image processing device of the present invention.
  • FIG. 12 is a flowchart of a recording process performed by the image processing apparatus of the present invention.
  • FIG. 13 is a flowchart of a reproducing process by the reproducing means of the present invention.
  • the photographing means 20 is detachable inside the vehicle, and photographs around the vehicle including the vehicle ahead.
  • the photographing means has a plurality of wide-angle (including fish-eye lenses) lenses.
  • two wide-angle (fish-eye) lenses front and rear lenses
  • are image pickup devices front and rear image pickup devices that can acquire images in all directions by disposing the image pickup device.
  • CMOS Complementary Metal Oxide Semiconductor
  • Image quality changing means 30 For example, in the case where the number of pixels photographed by the photographing means 20 is a high resolution of about 7,808 ⁇ 3,904, which is about 30 million pixels, the data amount becomes enormous if recorded as a moving image as it is. On the other hand, when the number of pixels is set to a low resolution of about 4 million pixels of 2,880 (horizontal) ⁇ 1,440 (vertical), the amount of data to be recorded is suppressed, but the resolution is lowered, and the resolution is reduced, so that the number of pixels in a recorded image such as a license plate of a preceding vehicle is reduced. A problem arises in that important parts cannot be seen.
  • the image quality changing means 30 cuts out a central portion where the license plate of the preceding vehicle, which is an important portion in the recorded image, is reflected, and divides this number of pixels into about 1,920 ⁇ 1,080 ⁇ 2,080 pixels.
  • the resolution is high, and the number of pixels including important parts (cut-out parts), such as around the vehicle ahead, is a low resolution of about 4 million pixels of 2,880 horizontal ⁇ 1,440 vertical, which is lower than the image quality of the important parts. (See FIGS. 2, 3 and 4).
  • the total number of pixels is about 6 million pixels, which can be reduced to 1/5 of the number of pixels in the case where the entire image is of high image quality (about 30 million pixels).
  • the license plate of the preceding vehicle in the high-quality image of the important part is easy to see and can be clearly confirmed. Further, since the amount of data to be processed can be reduced, the amount of heat generated by the entire apparatus can be suppressed.
  • the image quality in the present embodiment is the quality of the image, and a clear image such as a license plate of a vehicle ahead of about 10 meters is seen as high image quality, and an image without a license plate is seen as low image quality.
  • the image quality may be defined numerically by the number of pixels and the frame rate. In the case of the number of pixels, the important part has a high resolution so that the license plate of the vehicle ahead, which is about 10 meters away from the vehicle, can be visually recognized. For this reason, the resolution is lower than that of the high resolution with a reduced number of pixels. Therefore, the photographing means 20 of the present invention uses a camera capable of acquiring high-quality recorded data.
  • a specific configuration of the image quality changing unit 30 of the present embodiment includes a front temporary storage unit that temporarily stores a captured image from a front image sensor, and a rear side that temporarily stores a captured image from a rear image sensor.
  • Such image quality changing means 30 is configured to be able to arbitrarily change the size or position of the important part based on the position coordinates of the image.
  • the important portion which is the range of the cutout may be set as a continuous portion in front of, on the side of, and behind the vehicle, in other words, as a panorama, as shown in FIGS.
  • the surroundings of the own vehicle side and rear vehicles, pedestrians on sidewalks, traffic lights, and the like
  • the extraction of the important part by the image quality changing means 30 may be automatically set by license plate recognition, face recognition, sign or signal recognition via an externally connected artificial intelligence.
  • a plurality of parts can be set (see FIG. 7-9). As shown in the figure, a license plate of a vehicle in front may be used on the front side, and a driver may be used as an important part on the back side.
  • the image quality changing means 30 can arbitrarily change the setting of the captured image to be saved according to the specifications (memory capacity and the like) of the apparatus within a range where the image quality is lower than that of the important part.
  • the storage means 40 stores the image data processed by the image quality changing means 30.
  • the storage unit 40 for example, a DRAM (Dynamic Random Access Memory) can be applied.
  • the storage unit 40 may have a configuration in which an external storage such as an SD memory that can be easily taken out when the recorded image is reproduced by an external terminal (such as a portable terminal) is attached.
  • an external storage such as an SD memory that can be easily taken out when the recorded image is reproduced by an external terminal (such as a portable terminal) is attached.
  • the specific configuration of the storage means 40 is such that an important part storage unit for storing a high-resolution important part from an important part cutout unit and an image quality from a front whole image quality changing unit are reduced (low resolution). 1) and a whole front and rear storage unit for recording the rear photographed image with a reduced image quality (low resolution) from the front photographed image and the rear whole image quality changing unit.
  • the reproduction means 50 is application software capable of reproducing the recorded image stored in the storage means 40.
  • the reproduction means 50 sets a frame surrounding an important part in the recorded image and displays it during reproduction (see FIGS. 3 and 6).
  • the file is switched to a file (image data) of an important portion, and this portion is enlarged and displayed (see FIG. 4).
  • the reproducing means 50 reproduces the entire recorded image by the photographing means 20 and the recorded data of the important part in synchronization. Therefore, when an important part is selected at an arbitrary time during reproduction, it is possible to switch to the important part at that time and reproduce the image.
  • the reproducing means 50 is installed in an external terminal or an apparatus main body connected to the apparatus main body via a cable or wirelessly.
  • a drive recorder 70 which is an example of an image processing apparatus, has a photographing unit 20 that is a spherical camera having a fish-eye (wide-angle) lens mounted on the front and back surfaces of the recorder main body.
  • the recorder body can be attached to and detached from the windshield of the vehicle, and can photograph the front and side of the vehicle with a front lens (not shown), and can photograph the rear and side of the vehicle with a rear lens.
  • By synthesizing the images of the front and back fisheye lenses 360-degree omnidirectional images can be taken.
  • FIG. 11A and 11B are explanatory diagrams of an action camera serving as an image processing device, wherein FIG. 11A shows one main surface (back surface), and FIG. 11B shows the other main surface (front surface).
  • an action camera 80 which is an example of the image processing apparatus has a photographing unit 20 which is a spherical camera having a fish-eye (wide-angle) lens on the front and back surfaces of the camera body.
  • the camera body can photograph the photographer himself with the wide-angle (rear) lens on the back, and can photograph around the photographer with the wide-angle (front) lens on the front.
  • 360-degree omnidirectional images can be taken.
  • the image processing apparatus employs a configuration in which a photographing unit 20, an image quality changing unit 30, and a storage unit 40 are arranged in the apparatus main body, and a reproducing unit 50 and a display unit 60 are arranged in an external terminal.
  • the overall size can be reduced.
  • a configuration in which a reproducing unit 50 and a display unit 60 are added to the apparatus main body may be adopted.
  • the captured image is stored as follows (see FIG. 12). [Cut out important parts]
  • the image quality changing unit 30 performs a process of cutting out an important portion (a central portion where a license plate of a preceding vehicle is reflected) from a captured image captured by the capturing unit 20 in advance.
  • the range to be cut out can be arbitrarily set and changed in size and position based on the position coordinates of the image data.
  • a plurality of important portions can be set, for example, at locations where the license plates of the front and rear vehicles can be seen.
  • settings are made to lower the image quality than the important portion (for example, lowering the resolution, lowering the number of frame rates, etc.).
  • Photographing is performed by the photographing means 20.
  • the captured image is temporarily stored in the front and rear temporary storage units.
  • the image data processed by the image quality changing means 30 is stored in the storage means 40.
  • the important portion cut out by the image quality changing means 30 is stored at a high resolution.
  • the license plate of the preceding vehicle in the high-quality image of the important part is easy to see and can be clearly confirmed.
  • the entire data is stored at a low resolution, the amount of data to be processed can be reduced, so that the heat generation of the entire apparatus can be suppressed.
  • the reproduction of the recorded image is performed as follows (see FIG. 13).
  • the image processing apparatus is connected to an external terminal in which the reproducing unit 50 is installed, and the recorded image of the celestial sphere is displayed (reproduced) on the display unit 60.
  • the recorded image of the celestial sphere with a lower image quality than the important part is reproduced, and the important part surrounded by a frame (such as a dotted line) is displayed on the reproduction screen.
  • the present invention can be widely applied, for example, as a vehicle-mounted drive recorder.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Image Processing (AREA)
  • Traffic Control Systems (AREA)
  • Image Analysis (AREA)
  • Studio Devices (AREA)

Abstract

[Problème] Fournir un dispositif de traitement d'image qui peut faciliter la visualisation d'une partie importante d'une image et réduire une charge pendant une opération. À cet effet, l'invention concerne un dispositif de traitement d'image 10 qui est caractérisé en ce qu'il comprend : un moyen de photographie 20 qui est installé dans une cabine d'un véhicule de façon à enregistrer l'environnement du véhicule comprenant au moins un véhicule devant ; un moyen de changement de qualité d'image 30 pour découper une partie importante d'une image photographiée par le moyen de photographie 20, et réduire la qualité d'image de l'image photographiée ; et un moyen de stockage 40 pour stocker la partie importante découpée et l'image photographiée de qualité réduite.
PCT/JP2019/009997 2018-06-28 2019-03-12 Dispositif de traitement d'image, procédé de traitement d'image, et enregistreur de conduite Ceased WO2020003630A1 (fr)

Applications Claiming Priority (2)

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JP2018123704A JP7198599B2 (ja) 2018-06-28 2018-06-28 画像処理装置、画像処理方法、ドライブレコーダー
JP2018-123704 2018-06-28

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Cited By (1)

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CN115841711A (zh) * 2022-11-22 2023-03-24 深圳市京华信息技术有限公司 一种行车记录仪的控制方法、装置、行车记录仪和介质

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JP7832016B2 (ja) * 2022-02-28 2026-03-17 株式会社デンソーテン 車載装置および管理システム
JP7705091B2 (ja) * 2022-05-31 2025-07-09 トヨタ自動車株式会社 車両用画像記憶装置

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WO2009141951A1 (fr) * 2008-05-19 2009-11-26 パナソニック株式会社 Dispositif de photographie d'image et dispositif de codage d'image
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