I am using a sobel filter of size 3x3 to calculate the image derivative. Looking at some articles on the internet, it seems that kernels for sobel filter for size 5x5 and 7x7 are also common, but I...

Given a greyscale 8 bit image (2D array with values from 0 - 255 for pixel intensity), I want to implement the Sobel operators (mask) on an image. The Sobel function below basically loops around a ...

Is there any convolution method in Tensorflow to apply a Sobel filter to an image img (tensor of type float32 and rank 2)? sobel_x = tf.constant([[-1, 0, 1], [-2, 0, 2], [-1, 0, 1]], 'float32') re...

I am using OpenCV's Sobel filter of size 5x5 and 7x7 to calculate the image derivative. Could someone please let me know the kernel values for the Sobel filter of size 5x5 and 7x7 in OpenCV? When...

I'm trying to rebuild some preprocessing I have done before in Gimp, using OpenCV. The first stage is a Sobel filter for edge detection. It works very well in Gimp: Now here is my attempt with O...

I need to find the iris edges, the input images that I use is not a fully rounded iris, sometimes it might be covered by the eyelid. I found a summary of a journal article to find the iris even its...