how separate overlapping objects?

Hello, I have an image with two overlapping squared objects of the same size and colour. They are on a uniform backround and one object exceeds the other from the left with with a 10 degrees tilt. I need to extract the object on the top. How can I proceed?. Thanking you in advance for your help.

[Rob]

sorry, I said same colour but in fact they have different shades of blue but small variation.

Answer 1

[Vidhi Agarwal]

Hi @Rob,

I understand you are trying to extract the top overlapping object in an image with two similar blue squares (small color variation, ~10° tilt, and on a uniform background). Below are the rough steps that can help you in getting started:

• Read the image in MATLAB.
• Convert it to greyscale or HSV: Since the color difference is small but consistent, using hue or intensity helps.
• Segment the Top Object by Thresholding: Use adaptive or manual thresholding on hue or intensity.
• Clean and Rotate-Aware Processing: Use morphological operations to isolate connected tilted regions.
• Find Tilted Top Region Using Region Properties: Use "regionprops" to get orientation and bounding box.
• Extract the Object from Original Image.

For better understanding of "regionprops" refer to: https://www.mathworks.com/help/images/ref/regionprops.html

Hope this helps!