I need to implemet sliding window 30*7 for features extraction

Hello every one, I am working Text line recognition. I need to implemet sliding window 30*7 for features extraction as upper profile, mean of gravity, moment etc. Please guide me or send me code. I am totally new in this field and in matlab. Thank you in advance.

Saeeda

Answer 1

[Image Analyst]

If you're going to be doing specialized custom operations at each window location, then you need to us nlfilter. You define a function and then do whatever you want in there. Attached is a demo. Of you could have some nested for loops, over rows and columns, then inside there call a function like AnalyzeWindow() which you write to do your operations and return your feature vector.

[rows, columns, numberOfColorChannels] = size(yourImage);
for col = 1 : columns-7
  for row = 1 : rows-30
    results = AnalyzeWindow(yourImage, row, column); % You write this function.
  end
end