Sharpen an Image Using the GPU - MATLAB & Simulink (original) (raw)
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This example shows how to sharpen an image using gpuArray objects and GPU-enabled functions.
Read the image, and send it to the GPU using the gpuArray function.
image = gpuArray(imread("peppers.png"));
Convert the image to double arrays, and apply convolutions to obtain the gradient image. Then, using the gradient image, sharpen the image by a factor of amount.
dimage = im2double(image); gradient = convn(dimage,ones(3)/9,"same") - convn(dimage,ones(5)/25,"same"); amount = 5; sharpened = dimage + amount.*gradient;
Resize, plot and compare the original and sharpened images.
imshow(imresize([dimage,sharpened],0.7)); title("Original image (left) vs sharpened image (right)");
See Also
gpuArray | convn | imread | imshow