spatial transformation of image
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Hi guys, I am beginner to MATLAB.
How to convert one normal image(either gray or rgb) to 1 bit, 2 bit, 3 bit, 4 bit and 8 bit through spatial transformation?
Thanks.
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Answers (1)
Image Analyst
on 17 Sep 2016
You can't do that. You can transform the image spatially with function like imwarp(), imtranslate(), etc. but they won't change the bit depth.
See attached bit plane demo.
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Image Analyst
on 18 Sep 2016
Edited: Image Analyst
on 18 Sep 2016
In your picture, you're changing the spatial resolution of the image, not the intensity resolution which is the bit depth.
Of course if the intensities are only 2 bits, the intensities can be 0, 1, 2, or 3, so of course that's going to be darker than an image with 8 bits where the values can go as high as 255.
To reduce the spatial resolution of the image, you can use imresize, with the 'nearest' option, both to shrink it and to magnify it.
grayImage = imread('cameraman.tif');
subplot(3,1,1);
imshow(grayImage);
axis on;
smallImage = imresize(grayImage, 1/16, 'nearest');
subplot(3,1,2);
imshow(smallImage);
axis on;
bigImage = imresize(smallImage, 16, 'nearest');
subplot(3,1,3);
imshow(bigImage);
axis on;
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