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A method for occlusion detection and parallax correction based on region growing

A parallax correction and occlusion detection technology, applied in the field of image processing, can solve the problems of increasing matching errors and poor realization of parallax estimation, etc., and achieve the effect of reducing interference, avoiding parallax blur, and simple algorithm

Active Publication Date: 2017-11-14
NANJING UNIV OF SCI & TECH
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Problems solved by technology

This type of method effectively estimates the approximate parallax value of pixels affected by occlusion, but relies on the algorithm segmentation results, so the parallax estimation of some pixels affected by occlusion points is not well realized, and the wrong parallax value is filled in, resulting in increased match error

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  • A method for occlusion detection and parallax correction based on region growing
  • A method for occlusion detection and parallax correction based on region growing
  • A method for occlusion detection and parallax correction based on region growing

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Embodiment Construction

[0016] The present invention proposes a method for occlusion detection and parallax correction based on region growing. Through the color channel vectorization method, the similarity between doubtful points and non-doubtful points is calculated, and the pixel most similar to the doubtful point is selected, and its parallax value is used as The parallax value of the doubtful point, so as to complete the parallax correction. Such as figure 1 As shown, it specifically includes the following steps:

[0017] Step 1: Read the binocular image I to be matched l and I r , let the left view I l is the image to be matched, the right view I r To match the image, get the size and color channel information of the image;

[0018] Step 2: Use the dynamic programming algorithm of the tree structure to obtain the matching image I r Each matching point in the image to be matched I l The corresponding points to be matched in , calculate the displacement difference between each matching po...

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Abstract

The invention proposes a method for occlusion detection and parallax correction based on region growing. First, the initial disparity map is obtained through the tree structure dynamic programming algorithm, and then the occlusion area and the area affected by occlusion are detected by the suspicious region growing method on the edge of the initial disparity image, and finally the pixel points of the occlusion area and the area affected by occlusion are detected by using the color channel vectorization method The disparity value is repopulated to obtain the final disparity map. The present invention can significantly reduce the false matching rate of occlusion to the occlusion area and the area affected by the occlusion.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for occlusion detection and parallax correction based on region growing. Background technique [0002] The occlusion phenomenon has always been a research hotspot in binocular stereo matching. Due to the different depth of the scene, the scene farther from the camera is blocked by the scene closer to the camera, so that it cannot be projected onto the imaging surface of the camera to form an image. That is, the visible scene area under one viewpoint may become an occluded area under another viewpoint, as shown in the attached figure 2 shown. The occlusion phenomenon causes a large mismatch to the overall disparity map. Some existing methods can detect occlusion regions simply and effectively, such as the peak ratio method of disparity histogram (BMD), the order constraint method (ORD) of matching point pairs, and the occlusion constraint method (O...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T5/00
Inventor 张毅柏连发庞星韩静岳江金左轮赵壮
Owner NANJING UNIV OF SCI & TECH