Shape Recognition

differentiate Square, Rectangular, Circle from others


Updated 31 Mar 2016

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The program should recognize objects like circles, rectangles, and squares from the input image.
This is a shapes classifier based on the properties of each shape, like roundness, ratio of dimensions, centroid,?etc

In this classifier we will recognize only shapes like circles, rectangles, and squares from the input image.
So, we will concentrate on the steps we will follow to recognize those shapes from any input image.

We have seven steps:
1 - Read the RGB (colored) image in from user.
2 - Convert image from (RGB) colored to gray image.
3 - Threshold the image (convert gray image to binary image).
4 - Invert the binary image (in order to speed up the time of processing).
5 - Find the boundaries concentrate.
6 - Determine shapes properties (ratio of dimensions, roundness).
7 - Classify shapes according to its properties.

RGB image have the shapes to recognize.

The RGB image with shapes recognized and labeled.

Cite As

Ahmed Samieh (2023). Shape Recognition (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R14SP1
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes

include BSD License