Full-frame electronic image stabilization method based on feature matching
A feature matching and electronic image stabilization technology, which is applied in the field of image processing, can solve the problems of high complexity of feature extraction process, difficulty in hardware real-time implementation, and prone to mismatching, so as to improve observation effect, facilitate hardware real-time implementation, and enhance robustness. sticky effect
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[0034] The present invention is described in further detail below:
[0035] like figure 1 As shown, a full-frame electronic image stabilization method based on feature matching in the present invention mainly includes the following four processes: feature point extraction, feature point matching, motion parameter estimation, and stable full-frame output.
[0036] (1) Feature point extraction
[0037] Using the ORB feature descriptor (Rublee, Ethan, et al."ORB: an efficient alternative to SIFTor SURF."Computer Vision (ICCV), 2011IEEE International Conference on.IEEE, 2011.), each frame in the video sequence is Extract feature points.
[0038] In order to facilitate the real-time hardware implementation of this process, the present invention quantizes the direction angle of the feature point by 2π / 32 (11.25 degrees) according to the size relationship of the first-order moment of the feature point neighborhood, and establishes a fast lookup table. At the same time, according t...
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