how to save the segmented region as a separate image?

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Ad on 28 Oct 2017
Commented: Image Analyst on 24 Dec 2018
I have used the code which I have found in online and divided an image into several segments. I want to extract green parts from the image and store them. I am able to display the segmented image separately with black mask. but I want to display and save the green small segmented region only as a separate image (like 9 separate .jpg images ) without black regions.
This is the code I have found in online
segmented_images = cell(1,3);
rgb_label = repmat(pixel_labels,[1 1 3]);
for k = 1:nColors
color = img;
color(rgb_label ~= k) = 0;
segmented_images{k} = color;
Thank you in advance.
Ad on 28 Oct 2017
No. That is saving the region with black part. you can see it in greenpart.jpg image. I have used imshow() instead of imwrite().

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Accepted Answer

Image Analyst
Image Analyst on 5 Nov 2017
First get the outline, then the bounding box and use imcrop(). Then use imwrite(). Let me know if you can't figure it out.
Image Analyst
Image Analyst on 24 Dec 2018
If you want random regions for some reason, use randi() to get random coordinates, then you can use poly2mask() to make a binary image mask that you can use to extract colors from.
To use an edge detector, you simply apply it to the image using edge(), imgradient(), stdfilt(), or whatever edge filter you're using. Then it depends on what you mean by "extract". Like crop out to it's own smaller image using imcrop(), or extract values from like grayImage(mask), or something else.

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More Answers (1)

r r
r r on 4 Aug 2018
I have a gray set of 20 images I want to convert gray to color and every time I work on the conversion colors vary I want to install the color for all images for example, The area in red color is still red in image1 but change blue in image 2 The problem: the changed the color with repeated 20 images
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Image Analyst
Image Analyst on 4 Aug 2018
I have no idea what you're asking. Please try to rephrase, and attach some screenshots, in a new question (not back here). Basically I think you want to use ind2rgb() and somehow want to change the colormap with each image, though I'm not sure how you're going to decide how to change the colormap each time.

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