how to find the largest region in binary image and replace all other region with black?

I have a binary image (attached as 'randomm.jpg') that consists of several shapes.

How to extract the shape with most pixels (white) and replace other figures with black?

Thank you!

Answer 1

[Walter Roberson]

bwareafilt() asking to keep 1

https://www.mathworks.com/help/images/ref/bwareafilt.html

[Image Analyst]

binaryImage = bwareafilt(binaryImage, 1);

[Sokhib Tukhtayev]

Awesome, thank you!