CODEWITHSUNDEEP
ios
user187676
user187676

Reputation:

Efficiently Slice Image on GPU

I need to slice an image into N tiles (rects might be located anywhere and overlap), where N could potentially be quite huge. Since CGImage operates on the CPU and this is a performance critical operation that happens several times per second I was wondering if there is a faster way to do this on the GPU.

What's the fastest possible solution to slice an image (possibly using the GPU)?

PS: If it helps in any way, the image is only grayscale (array of floats between 0 and 1). It doesn't have to be an CGImage/UIImage, a float array suffices.

Upvotes: 1

Views: 143

Answers (1)

anon
anon

Reputation:

Since slicing images is basically just copying chunks of the image to a new image there is not really a way to speed up that process. Depending on what you are doing with the slices you might be able to get away with not copying the data. If you keep only the coordinates of your slices you can access the underlying storage of your original image.

Upvotes: 1

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