Description: Based on the Sobel operator. This method is an image divided into pre-set the size of grid, in the two scales of image analysis, image edge detection. First of all, seek to use Sobel edge operator, based on the edge of the grid contains the number of pixels as well as the connectivity will be a different deal with the grid, respectively. And then to the grid for the data unit, in the larger scale use Sobel edge operator. Finally the data by setting the priority and use of morphological methods of calculation of the merger of two marginal results.
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