I read Dalal and Triggs paper for HOG description and a blog Chris McCormick HOG regarding the same. The blog says that the image needs to be re-sampled at different scales to recognize different person.
My question is: Already we have a window which we place on the image having a size of 64*128 and which slides over the image. Then why re-sampling instead of sliding the whole window over the image which can detect the persons instead. ?
Please rectify if I am wrong, thanks in advance !!