A method of generating decimal lookup table for video mosaic
A video splicing and look-up table technology, applied in image data processing, instruments, computing and other directions, can solve the problems of difficulty in meeting the real-time requirements of video splicing, large amount of calculation, slow speed, etc.
Active Publication Date: 2016-04-06
NAT UNIV OF DEFENSE TECH +1
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[0004] The traditional image registration process includes steps such as projection transformation, feature point detection and matching, and mismatch point filtering. The calculation is large and the speed is slow, which is difficult to meet the real-time requirements of video stitching.
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[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0038] The invention provides a method for generating a decimal lookup table for video mosaic, such as figure 1 shown, including the following steps:
[0039] S1. Coordinate projection: project the captured images to be spliced into a standard coordinate system;
[0040] S2. Feature point detection and matching: performing feature point detection and matching on the projected image in step S1 to obtain an initial matching feature point set;
[0041] S3. Filtering out false matching points: filtering out false matching points in the initial matching feature point set to obtain a final matching feature point set;
[0042] S4. Construct a decimal lookup table: use the feature point coordinates in the final matching feature point sets of two adjacent images to solve the transformation relationship between the captured image and the stitched ima...
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The invention belongs to the field of graphic information processing, and provides a decimal lookup table generation method for video stitching. The decimal lookup table generation method for video stitching comprises the steps of coordinate projection, feature point detection and matching, filtering of erroneous matching points and construction of a decimal lookup table. According to the decimal lookup table generation method for video stitching, first, coordinate projection is conducted, wherein images to be stitched are projected to a standard coordinate system; then, feature point detection and matching is conducted, and the erroneous matching points are filtered; finally, the decimal lookup table is constructed and clipped according to the size of a stitched video, and a stitched video image is obtained by means of the decimal lookup table through bilinear interpolation. According to the decimal lookup table generation method for video stitching, a one-to-one mapping relation between shot images and stitching image coordinates can be obtained to meet the requirement for instantaneity of video stitching; meanwhile, the decimal lookup table is more natural than an integer lookup table in transition, and therefore an ideal visual effect can be achieved.
Description
technical field [0001] The invention relates to a method for generating a decimal lookup table for video splicing, which belongs to the field of image information processing, and specifically includes coordinate projection, feature point detection and matching, filtering out incorrectly matched points, and building a decimal lookup table. Background technique [0002] Video splicing technology breaks through the physical limitations of camera acquisition sensors. By splicing video sequences shot by multiple cameras at the same time, high-resolution panoramic videos can be obtained, which can greatly improve people's dynamic perception, identification, and monitoring capabilities of objects and scenes. Applying video stitching technology to the military field can provide all-round scene information for military reconnaissance, which is of great significance for battlefield information perception, intelligence acquisition and combat command. [0003] The key points of video st...
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IPC IPC(8): G06T5/00
Inventor 张茂军王炜熊志辉尹晓晴谭树人徐玮刘煜张政李靖彭杨
Owner NAT UNIV OF DEFENSE TECH