Method for aperture synthesis imaging through multi-view shooting

Abstract

The invention discloses a method for aperture synthesis imaging through multi-view shooting and belongs to the technical field of imaging processing. The method includes the following steps: step 1, performing coordinate transformation on an original image sequence by adopting plane projective transformation, and performing re-sampling synthesis to focus on an image sequence of an uninterested plane; step 2, recognizing image points focused on the uninterested plane according to a variance threshold value method, and removing image points on an uninterested aim plane pi from the original image sequence; step 3, according to plane projective transformation, performing coordinate transformation on the original image sequence with the uninterested target removed; and step 4, synthesizing all transformed image coordinates, and re-synthesizing an interested target plane through re-sampling to obtain the target image. By means of the method for repeated plane projective transformation, perspective imaging is performed on the interested target plane accurately, installation errors of a plane camera array are revised, and contrast ratio and definition of the interested target are improved.

Description

technical field [0001] The invention relates to a method for synthesizing images with accurate apertures by shooting from multiple perspectives, and belongs to the technical field of image processing. Background technique [0002] In traditional imaging systems, the camera's depth of field increases with increasing focus distance and decreases with increasing aperture. In order to achieve some special shooting effects, such as highlighting an object of interest, a smaller depth-of-field imaging system is required. However, the distance between the camera and the target object often cannot be changed, that is, the focus distance is fixed. In this case, a camera with a large aperture (aperture) can be used to obtain the imaging effect of a small depth of field. The larger the aperture of the camera, the more light it can record from different directions. However, the aperture of the camera should not be too large, otherwise the aberration and distortion of the lens will incr...

AI Technical Summary

Problems solved by technology

[0005] Therefore, in the existing technology of multi-angle shooting for aperture synthesis imaging, there are the following disadvantages: in actual installation, it is difficult to strictly ensure that the optical centers of all shooting angles are located on the same plane; the original image sequence is shifted by an entire pixel to focus The plane of interest ignores the possibility of non-integer pixels in its parallax, which reduces the clarity of the synthetic aperture image; superimposing and averaging all focused images is equivalent to low-pass filtering the original image, which loses the sharpness of the target image. high frequency details

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