How do I define ROI( region of Interest) inline code? Without using impoly.

For Indian currency denomination recognition I need to crop only center area to detect Denomination. How can I define the ROI using percentage or else to detect the center for all Indian currecy notes.

From this data sets I want to crop only the center (where the digit only be cropped) by define the area using a generalized code. Like below.

Answer 1

[KSSV]

I = imread('100_frn.jpg') ;
% Get center of image 
C = round(size(I)/2) ;
C = [C(2) C(1)] ;
%%Get number part 
idx = C(1)-150:C(1)+150 ;
idy = C(2)-100:C(2)+100 ;
I1 = I(idy,idx,:) ;
imshow(I1)

[Rosy]

Thanks, but if we define any arbitrary step pixel value like 150, 100. It cant work properly for other images. Can we define it another way without define any fixed number? using any percentage?