April 2020
Intermediate to advanced
438 pages
12h 2m
English
Content preview from Python Image Processing Cookbook
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How it works...
Weighted Sobel horizontal and vertical gradients were used in the get_gradient() function to compute the gradient of a color channel. The findTransformECC() function from OpenCV-Python was used for the ECC algorithm. The first two parameters accepted by this function were the (single-channel) template image and the input image.
The red color channel was used as a template (reference) and the green/blue color channels were used as inputs. The third parameter passed to the function was warp_matrix, which was initialized to the 3x3 identity matrix.
The fourth parameter is the motion model; here, MOTION_HOMOGRAPHY was used as the motion model (8 parameters are estimated in the 3x3 warp matrix). The following table lists all possible ...
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