Image restoration method and system based on angle perception block matching
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A block matching and image technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of wrong matching, not fully considering the block angle perception characteristics, ignoring transitivity, etc.
Active Publication Date: 2019-09-17
SHANDONG NORMAL UNIV
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[0008] (1) Each time only a single matching block is selected from the source area to fill the target block, the angle perception characteristics of the block are not fully considered, the transitivity between blocks is ignored, and the global structure of the image cannot be fully utilized, making the repaired area There is an inconsistency with the surrounding area;
[0009] (2) This method does not consider the influence of the content of the area to be repaired, and only fills
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Embodiment 1
[0086] Embodiment 1. This embodiment provides an image restoration method based on angle-aware block matching.
[0087] Such as figure 1 As shown, an image inpainting method based on angle-aware block matching includes:
[0088] Step 1. Determine the area to be repaired: input the image to be repaired, and divide the image to be repaired into the area to be repaired and the source area, wherein the area to be repaired is the defect area in the image;
[0089] Step 2. Initialize the damaged area: project the incomplete image into the three-dimensional subspace, use the moving least squares method to fill in the incomplete part to obtain the fitted surface, and then use the value of the resampled pixel point from the fitted surface as the missing area The estimated value of the corresponding pixel is obtained to initialize the image I';
[0090] Step 3. Determine the target block to be filled: calculate the priority function values of all pixel points p on the boundary δΩ in...
Embodiment 2
[0171] Embodiment 2. This embodiment provides an image restoration system based on angle-aware block matching.
[0172] An image restoration method system based on angle-aware block matching, comprising:
[0173] an input module configured to input an image to be repaired, and divide the image to be repaired into a region to be repaired and a source region;
[0174] A fitting module, which is configured to project the image to be repaired into a three-dimensional space, use the moving least squares method to achieve surface fitting, and then use the value of the resampled pixel point from the fitting surface as the estimated value of the pixel in the missing area, to obtain initialized image I';
[0175] Determine the filled target block module, which is configured to calculate the priority function values of all pixel points p on the boundary δΩ in the image I', and determine the point with the highest priority target block The size according to the point The size of...
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Abstract
The invention discloses an image restoration method and system based on angle perception block matching, and the method comprises the steps: dividing a to-be-restored image into a target to-be-restored area and a source area, and carrying out the curved surface fitting; then, determining a to-be-filled target block with the highest priority; rotating a matching block most similar to the target block in the source region, and obtaining an optimal matching block by using angle perception; and finally, filling a to-be-repaired area in the target block, and updating the confidence value of the filled pixel point; and repeating the above steps until the to-be-repaired area is completely filled. According to the method, the optimal spatial position is sensed by using the angular rotation of the matching block, so that the image content including the color, the texture and the geometric shape of the defect area is recovered to the maximum extent, and the visual requirement of human beings can be well met. The method can be successfully applied to image restoration of various large-area damaged areas with complex textures and geometrical structure characteristics, and can also be effectively applied to the aspects of shielding object removal, target object moving and the like.
Description
technical field [0001] The invention relates to the field of computer image processing, in particular to an image restoration method and system based on angle-aware block matching. Background technique [0002] The statements in this section merely mention the background technology related to the present invention and do not necessarily constitute the prior art. [0003] In the process of realizing the present invention, the inventor finds that there are following technical problems in the prior art: [0004] Digital image restoration refers to a technology that uses the known pixel information in the image to automatically fill the damaged area, so that the repaired image can meet the consistency requirements of human vision. Image restoration is a research hotspot in image restoration, which is widely used in the fields of protection of ancient cultural relics, image editing (removing unwanted text or occluded objects, etc.), medicine and military affairs. [0005] Gener...
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