In the mouse brain perfusion image attached, could you please tell me how to remove the blue background?

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Surya Gnyawali
Surya Gnyawali 2016-3-21
编辑： Image Analyst 2016-3-21
im = imread('Picture1.png'); I = rgb2gray(im); imshow(im); rgbImage = ind2rgb(I, jet(256)); imshow(rgbImage); maskedImage = double(repmat(rgbImage, 1, 1, 3)); imshow(maskedImage);
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Image Analyst
Image Analyst 2016-3-21
编辑：Image Analyst 2016-3-21
Read this to format your code. Then be sure to use the green and brown picture frame icon to insert your picture into your post.
And explain what "remove" means to you. Do you mean crop? Do you mean blue goes to black? What???

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