What is feautre extraction? And what is its use in classification of image processing?

What is feautre extraction? And what is its use in classification of image processing?

I want to know in the context of svm classification for image processing

Answer 1

[Image Analyst]

It's the making of measurements from an image. First you do segmentation to find the objects. Then you can classify them into different objects/"blobs" (e.g. circles and squares). Then you can label them to assign unique ID numbers for them. Then you can measure features for each blob, like area, perimeter, etc.