CN103473754A - A new digital archiving method for murals - Google Patents

Abstract

The invention discloses a novel digital archiving method for murals, which includes the following steps: S1. Obtaining images: firstly, the murals are virtually divided into several grids, and then the murals are photographed one by one according to the divided grids to obtain the image of each grid , there is a certain overlap between the images of every two adjacent grids, record the acquisition time of each image, and keep the focal length unchanged during the shooting process; S2, collect coordinate points: scan the mural to obtain the space of the mural Information, texture information and reflection intensity, and then collect the dense coordinate points of the mural; S3, mosaic image: in order of the acquisition time of the image, seamlessly stitch all the images to obtain a complete photo of the mural; S4, image correction: convert all The dense coordinate points are registered with the complete photo, and then the complete photo is corrected to make the complete photo an orthophoto. The invention can make photos into orthophotos and realize hundreds of millions of infinite scaling effects.

Description

A new digital archiving method for murals

technical field

The invention belongs to the technical field of audio-visual information, and in particular relates to a novel mural digital archiving method.

Background technique

In the field of cultural heritage protection and display, when faced with objects such as ultra-wide format and large-area stone carvings, steles, murals, etc., it is often impossible to fully reflect the object in a single photo. In the photos, the clarity and orthographic requirements of the photos cannot be guaranteed, so the requirements for complete coverage of large-format objects, orthographic images, and high-definition photos cannot be solved in daily work.

Contents of the invention

The technical problem to be solved by the present invention is to provide a new type of mural digital archiving method, which can ensure the width of the mural frame and ensure the ultra-high definition of the photo, and at the same time, it can also ensure that the photo can achieve hundreds of millions of pixels orthophoto Infinite zoom display.

The technical solution adopted by the present invention to solve the technical problem is: a novel mural digital archiving method, which includes the following steps:

S1. Acquiring high-definition images: First, divide the murals into several grids virtually, and then take photos of the murals one by one according to the divided grids to obtain high-definition images of each grid. There is a certain distance between the images of every two adjacent grids. The coincidence degree, record the acquisition time of each image, and keep the focal length unchanged during the shooting process;

S2. Collect coordinate points: Scan the mural to obtain the spatial information, texture information and reflection intensity of the mural, and then collect the dense coordinate points of the mural;

S3. Stitching images: seamlessly splicing all the images in order of the acquisition time of the images to obtain a complete picture of the mural;

S4. Image correction: register the dense coordinate points with the complete photo, and then correct the complete photo, so that the complete photo becomes an orthophoto.

The beneficial effects produced by the present invention are: the present invention can ensure the width of the mural frame and the ultra-high definition of the photo, so that the complete orthographic reflection of the mural is reflected in a photo, and it can also ensure that the photo realizes hundreds of millions of pixels The infinite zoom display of orthophotos allows you to observe every detail of the murals more carefully under ultra-high-definition pixels.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a flowchart of an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1, a novel mural digital archiving method includes the following steps:

S1. Obtain high-definition images: According to the technical requirements of the project, the space of the work area, and the lighting environment, the mural is first divided into several grids, and then a high-resolution SLR camera is selected. The bronze drum tripod is stabilized and the focus is fixed. The focal length remains unchanged during the shooting process. , take pictures of the murals one by one according to the divided grids, obtain high-definition images of each grid, and record the acquisition time of each image with a certain degree of overlap between the images of every two adjacent grids;

S2. Collection of coordinate points: Through on-site survey, determine the erection plan of the coordinate collection equipment measuring station and the placement plan of the splicing ball, conduct a complete scan of the mural, and obtain the spatial information (3D coordinates), texture information (RGB value) and reflection of the mural High-precision, high-density and complete information of murals such as intensity (I value), and then collect dense coordinate points of murals;

S3. Stitching images: Since there is a certain degree of overlap between the images of two adjacent grids, all images are seamlessly stitched in the order of the acquisition time of the images to obtain a complete photo of the mural, which has a very high Sharpness and extremely high pixel values;

S4. Image correction: The photos taken on the murals belong to the central projection. Except that the focal length center is strictly orthographic projection, the rest have certain deformation. Since the spatial information of the collected coordinate points is unique, the dense coordinate points Register with the complete photo of the mural, and then correct the complete photo to make the complete photo an orthophoto, and realize infinite zoom.

The method provided by the present invention can also be used for other near-plane objects such as super-wide-frame and super-large-area stone carvings and steles to realize their digital archiving.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present invention.

Claims (1)

1. a novel mural painting digitizing archiving method, is characterized in that, comprises the following steps:

S1, obtain high-definition image: at first by the some grids of the virtual division of mural painting, according to ready-portioned grid, mural painting is taken pictures one by one again, obtain the high-definition image of each grid, there is certain registration between the image of every two adjacent mesh, record the acquisition time of every image, remain unchanged in the shooting process mid-focal length;

S2, coordinate acquisition point: mural painting is scanned, obtain spatial information, texture information and the reflection strength of mural painting, and then gather the intensive coordinate points of mural painting;

S3, stitching image: the acquisition time of image of take is order, all images is carried out seamless spliced, obtains the integral photograph of mural painting;

S4, image rectification: described intensive coordinate points and described integral photograph are carried out to registration, and then integral photograph is corrected, integral photograph is become and just penetrate photo.

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