Introduction to Techniques of Edge Detection in Images

Edge detection is a important weapon in Image Processing. As name suggests it detects the edges of an image. More importantly it is able to capture some important properties of an image.

Important properties of Edge Detection :-

1) As we know in an image, not all pixels are important for a particular application. Some lesser important pixels can be eliminated. Edge detection helps in re-structuring an image.

2) Eliminates the need to process and store redundant pixel information.

3) Makes analyzing and interpreting the pictures much easier.

4) Helps immensely in Pattern Recognition

Example of Edge Detection :-


Image (Before Edge Detection)







Image (After Edge Detection)








In next post i will explain few Techniques (Sobel, Prewitt, Roberts etc) of edge detection.

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