Edge Detection vs. Contour Detection?

1. What is the difference between edge detection and contour detection?
2. What is meant by contour detection?
3. What is contour detection in image processing?
4. Which edge detection method is best?

What is the difference between edge detection and contour detection?

As can be read in the documentation, detecting contours is mostly used for object recognition, whereas the canny edge detector is a more "global" operation. I wouldn't be surprised if the contour algorithm uses some sort of canny edge detection.

What is meant by contour detection?

Contours detection is a process can be explained simply as a curve joining all the continuous points (along with the boundary), having same colour or intensity. The contours are a useful tool for shape analysis and object detection and recognition.

What is contour detection in image processing?

Using contour detection, we can detect the borders of objects, and localize them easily in an image. It is often the first step for many interesting applications, such as image-foreground extraction, simple-image segmentation, detection and recognition.

Which edge detection method is best?

The Canny Edge Detection algorithm is a widely used edge detection algorithm in today's image processing applications.