Is my understanding correct? A horizontal Sobel filter highlights vertical lines because it is sensitive to intensity changes in the image in the horizontal direction. It detects horizontal change (similarly to a partial derivative in the x direction), and when it encounters a vertical line, it detects a sudden large change because it goes from relatively normal to a (typically) dark boundary. This change is processed during the convolution (lin alg/gradient calculation/etc) and reflected in the final processed image as a darker, more pronounced line.
motoole2
That's correct! The horizontal Sobel filter detects changes in the horizontal direction, and the vertical Sobel filter detects changes in the vertical direction.
Is my understanding correct? A horizontal Sobel filter highlights vertical lines because it is sensitive to intensity changes in the image in the horizontal direction. It detects horizontal change (similarly to a partial derivative in the x direction), and when it encounters a vertical line, it detects a sudden large change because it goes from relatively normal to a (typically) dark boundary. This change is processed during the convolution (lin alg/gradient calculation/etc) and reflected in the final processed image as a darker, more pronounced line.
That's correct! The horizontal Sobel filter detects changes in the horizontal direction, and the vertical Sobel filter detects changes in the vertical direction.