doubt in accessing cell arrays?

myFolder = 'E:\\inverted\\i1';
for PicNum = 100:-1:1;
  fullFileName = fullfile(myFolder,sprintf('%d.bmp',PicNum));
  fprintf(1, 'Now reading %s\n', fullFileName);
  imageArray{PicNum}=imread(fullFileName);
  logicalImage{PicNum}=imageArray{PicNum} ~=0;
  for i=1:1:100
  feature_extractor(logicalImage{1:PicNum});//in ans i need to get the values of all the images in <100*85> but i didnt get.
  end
  imshow(imageArray{PicNum});  % Display image.
end