Split an image using a threshold

Hello, ı have image(2230*1949 double) . I want to Split an it to 2 image using a threshold value. How can i do?

Answer 1

[Image Analyst]

Try this

brightThings = grayImage > yourThresholdValue;  % Creates a binary (logical) image.
imshow(brightThings);
props = regionprops(brightThings, 'All') % Measure a bunch of things about each bright blob.

Obviously, change variable names if you have to, to match what names you already have.

If you're just beginning image processing you really need to step through my Image Segmentation Tutorial in my File Exchange : http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862&sort=downloads_desc.