Computes radial variance hash of the input image

hash = cv.ImgHash.radialVarianceHash(img)
hash = cv.ImgHash.radialVarianceHash(img, 'OptionName',optionValue, ...)

Input

• img input image want to compute hash value, type should be uint8, with 1/3/4 channels.

Output

• hash Hash value of input, contains 40 uint8 values.

Options

• Sigma Gaussian kernel standard deviation. default 1
• NumOfAngleLine The number of angles to consider. default 180