gradient of an image

asked 2014-08-26 04:44:25 -0600

jamesnzt

242 ●1 ●4 ●16

updated 2014-08-26 04:45:20 -0600

Which function can be used to find the gradient of the gray scale image in openCV?

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Here is an example of Sobel operator which computes an approximation of the gradient of an image intensity function. http://docs.opencv.org/2.4.4/doc/tutorials/imgproc/imgtrans/sobel_derivatives/sobel_derivatives.html?highlight=sobel

la lluvia ( 2014-08-26 05:26:05 -0600 )edit

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answered 2014-08-26 05:26:25 -0600

sergio
25 ●4

Maybe you could use Sobel derivatives

 /// Gradient X
 //Scharr( src_gray, grad_x, ddepth, 1, 0, scale, delta, BORDER_DEFAULT );
 Sobel( src_gray, grad_x, ddepth, 1, 0, 3, scale, delta, BORDER_DEFAULT );
 convertScaleAbs( grad_x, abs_grad_x );

 /// Gradient Y
 //Scharr( src_gray, grad_y, ddepth, 0, 1, scale, delta, BORDER_DEFAULT );
 Sobel( src_gray, grad_y, ddepth, 0, 1, 3, scale, delta, BORDER_DEFAULT );
 convertScaleAbs( grad_y, abs_grad_y );