Image definition detecting method and device
A technology of image clarity and detection device, applied in the field of image processing, can solve the problems of no longer having comparability, no image clarity index, etc., and achieve the effect of improving the processing speed
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[0027] see figure 1 , the image clarity detection method provided by Embodiment 1 of the present invention includes the following steps:
[0028] S110. Acquire an original image, and convert the original image into a grayscale image.
[0029] S120. Select M image blocks in the grayscale image, where M is an integer greater than or equal to 1.
[0030] S130. Calculate the gradient magnitude map of each image block in the M image blocks.
[0031] S140. Convert the gradient magnitude map of each image block into a one-dimensional image edge gradient magnitude signal and a one-dimensional image edge grayscale signal.
[0032] S150. Calculate the sharpness metric value of each image block according to the one-dimensional image edge gradient amplitude signal and the one-dimensional image edge grayscale signal of each image block.
[0033] S160. When M=1, use the sharpness measurement value as the sharpness detection result of the original image, and when M>1, average the sharpnes...
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