Extracting data from ROI an IR image and discarding other pixels

Hi, I am new to matlab. I am trying to extract pixel data of a particular region (ROI defined by the user) in order to characterise that region. But I only want to extract this ROI and remove all other pixels. Any recommended approaches/code?

Answer 1

[Image Analyst]

See my attached demo.

Answer 2

[Shivam Gupta]

You can extract pixel data of a particular region by using IMCROP function.

For example,

I= imread('example.png');

imshow(I);

rect = [290 160 220 165];

I2= imcrop(I,rect);

figure

imshow(I2);

For more information, see:

https://in.mathworks.com/help/matlab/ref/imshow.html?searchHighlight=imshow&s_tid=doc_srchtitle

https://in.mathworks.com/help/matlab/ref/imread.html?searchHighlight=imread&s_tid=doc_srchtitle

https://in.mathworks.com/help/images/ref/imcrop.html?searchHighlight=imcrop&s_tid=doc_srchtitle