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I have a masking demo if you want to see it. It blackens outside the ROI. Do you want that, or you want the bounding box cropped out? 16 Nov 2013 I have grids of images as different objects e.g. 5x5 grid of 25 sub-images as objects in one image. Each sub-image has a blue coloured i have an image having pixels 512*512 . i want to break it in equal sub images (for eg like into images of 8*8) and want to apply a function (can be any) on each Thanks. Its help me very much. But I want to do leveling using ROI, Can you tell me how I do this? My code show images and using the help of your code alsoThis MATLAB function lets you select a rectangle in the current axes using the mouse. Choose points interactively in the displayed image using the mouse. hi i need to select a region in image and then save the value of those pixels by using impixel i can choose some pixel by clicking on picture but it is bothersome 25 Jan 2018 I have an image and divided into 2 * 2 grid. Now I want to get centralized sub-image of the same image so that I can find out the features of the This MATLAB function displays the indexed image X with colormap map in the current axes. After this I am stuck. I have no Idea how to change the whole image grayscale except for the sub image which should be in color. How do I do this? Thank you. 17 Mar 2017 Hey, I'm new in Matlab and I'm working on mammograms, I need to extract the central region of the image and then calculate a few things.