Edge detection of 1-D signals

1. Is Canny edge detector is first derivative?
2. Which method is used for edge detection?
3. How the edges are detected using derivative operators?

Is Canny edge detector is first derivative?

The optimal function in Canny's detector is described by the sum of four exponential terms, but it can be approximated by the first derivative of a Gaussian.

Which method is used for edge detection?

Common edge detection algorithms include Sobel, Canny, Prewitt, Roberts, and fuzzy logic methods. Image segmentation using the Sobel method. Image segmentation using the Canny method. Image segmentation using a Fuzzy Logic method.

How the edges are detected using derivative operators?

Edge detection is the technique used to identify the regions in the image where the brightness of the image changes sharply. This sharp change in the intensity value is observed at the local minima or local maxima in the image histogram, using the first-order derivative.