MATLAB: How to increase the resolution of an image

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Hi guys; I want some help, I ve an image which I want to increase its resolution 5 times, but I don't know how I can do that, if u ve any ideas, plz let me know.thanks

Best Answer

You can increase the number of elements by using imresize

bigImage = imresize(smallImage, 5);

Of course that does not increase the real world spatial resolution (only Hollywood can do that), so if the image is blurry, you'll still have the same blurry image, just with 5 times as many pixels.

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MATLAB: How to convert Low Resolution Image To High definition image

You can change the image matrix size with imresize(). This does not change the actual real world spatial resolution (like how well you can resolve to points close together in the scene), just the number of pixels. To increase the resolution you need to use a spatial filter, like deconvlucy() or wiener2() which require you to supply a point spread function and a noise spectrum.

MATLAB: How to save a image file to a higher resolution that it actually is

You can use imresize() to increase the pixel count before you write it out. Note that this does not increase the optical resolution - it will look just as blurry, just bigger.

bigMatrix = imresize(originalMatrix, 4); % Blow up by a factor of 4
imwrite(bigMatrix, filename);

You can also blow up images just on display by using the 'InitialMagnification' input parameter to the imshow() function:

imshow(originalMatrix, 'InitialMagnification', 800);

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MATLAB: How to convert Low Resolution Image To High definition image

MATLAB: How to save a image file to a higher resolution that it actually is

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