How are sobel an feld alike and different?

Sobel and Feld are both methods used in image processing for edge detection, but they differ in their approach and application. The Sobel operator uses convolution with specific kernels to calculate the gradient magnitude and direction of edges in an image, while Feld refers to a more generalized concept of feature extraction that may involve various algorithms. While both aim to highlight important features in images, Sobel is a specific technique, whereas Feld encompasses a broader range of methods and applications.