MATLAB: How to save an image displayed

image display

Dear friends, i would like to save an image displayed by imshow(I) command in tif format. for example, ifter displaying the image, i select an interactive ROI using "imfreehand(gca", them i wud like to save the image with that RIO borders. when whenever i try this, it is saving its borders also with the image. I dont want that border frame to be saved. may you plz help ? the image shud be saved in .tif format only…

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The saved image must be rectangular, no matter what your freehand ROI looks like, but the outer layer of pixels shouldn't be white unless you're cropping the image and then setting them white. You are using imwrite() to save the cropped portion aren't you?

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MATLAB: Image save with colormap

When you said "I made gray image to color image with jet colormap" it's not clear if you used

rgbImage = ind2rgb(grayImage, jet(256));
imshow(rgbImage);

Or if you did

imshow(grayImage, []);
colormap(jet(256));

The first snippet creates a new full color RGB image, while the second snippet just displays the gray scale image with a pseudocolor lookup table. Which did you do?

Then you say " imshow function does not support the full scale". Not sure if you mean the size scale or the intensity scale. Anyway, imshow() supports both. The image will be scaled to fit so that the whole image will fit into whatever size the axes control is.

Then you say "the imshow function does not support the full ... size saving". You don't use imshow() to save the image, you use imwrite(), and imwrite() will save the full sized image.

If you want to display the full size image, you'll need to use a imscrollpanel. See attached demo from the Mathworks.

MATLAB: Saving grayscale image as it appears in jet colormap of imagesc

http://www.mathworks.com/matlabcentral/fileexchange/7943

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MATLAB: Image save with colormap

MATLAB: Saving grayscale image as it appears in jet colormap of imagesc

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