How can I use the GPU accelerated imdilate function for 3D logical Arrays?
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At the moment I am developing a region growing algorithm in which I use the imdilate function to iterative expand the region of interest. From a performance test I noticed that I use the imdilate function numerous times during the process, which took 80% of my computational time. Therefore, I wanted to accelerate the region growing algorithm by using the graphic processing unit (GPU) for the whole process. However, the imdilate function does not support three-dimensional structuring elements for gpuArrays.
So the question is: How can I use the GPU accelerated imdilate function for 3D logical Arrays?
Example code:
A = rand(300,300,250);
B = A < 0.2;
D = imdilate(B, true(3,3,3)); % CPU method
B2 = gpuArray(B);
D2 = imdilate(B2, true(3,3,3)); % GPU method that does not work
D3 = imdilate(imdilate(imdilate(B2, true(3,1,1)), true(1,3,1)), true(1,1,3)); % second GPU method that does not work
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Answers (1)
Simão Faria
on 28 Mar 2018
D2 = imdilate(B2, true(3,3,3,'gpuArray'));
Both the matrix and the kernel should be gpuArrays
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