make cuda::absdiff support multi-channel scalars

I took the subScalar.cu code and changed the inner operation

make cuda::absdiff support multi-channel scalars
I took the subScalar.cu code and changed the inner operation
6cf4371e · chacha21 · 9a92777f · 6cf4371e
Commit 6cf4371e authored Mar 03, 2017 by chacha21
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absdiff_scalar.cu modules/cudaarithm/src/cuda/absdiff_scalar.cu +0 -0

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--- a/modules/cudaarithm/src/cuda/absdiff_scalar.cu
+++ b/modules/cudaarithm/src/cuda/absdiff_scalar.cu