Finding rectangles of a specific size in an image

I have 2 pictures:

1: a picture of 2x4 lego piece

2: a picture of scattered lego pieces

I need to find all 2x4 lego pieces of picture 1 in picture 2.

I tried finding the distline of the 2x4 lego piece, but I can't match it to the ones in the 2nd image.

I also considered using a histogram to compare values of blocks, but I can't seem to get the individual blocks of the same size in image 2

Answer 1

[Vinai Datta Thatiparthi]

Hi Geetha!

MATLAB supports detection of features through multiple functions that employ different feature detection algorithms. Here is the list.

Further, here is a step-by-step example on “Object Detection in a Cluttered Scene Using Point Feature Matching” that may be of help to you. This example uses the SURF Features to match the objects between the 2 images.

Hope this helps!