Show the object in boundary box

I'm trying to use boundary box for each objects and then calculate color histogram for each object !

Here in my code, I tried to show the object which is "white square"

[row , col ] = size (bbox);
  for i =1 : row
   x = bbox(i,1);
   y =bbox(i,2);
   w=bbox(i,3);
   h=bbox(i,4);
  TestImage = OriginalImage(x:(x+w), y:(y+h),:);
  r = TestImage(:,:,1);
  g = TestImage(:,:,2);
  b = TestImage(:,:,3);
  subplot(2,2,3)
  imshow(TestImage);
  end

but the result isn't what I expected, see the image ! Any advice please :)

Answer 1

[Image Analyst]

This is a very common beginner mistake.

You think arrays are indexed as OriginalImage(x, y). They ARE NOT. They are indexed as OriginalImage(row, column), which is OriginalImage(y, x). Reverse your indexes:

TestImage = OriginalImage(y:(y+h), x:(x+w), :);