OpenCL
output = imlincomb_ATI(a, input1, b, input2);
output, input1 and input2 are uint8 types. a and b are double types.
A linear combination of two images. In our implementation, 16 uint8 data are packed into uint vector 4
to maximize the utilization of the memory bandwidth (CPU-GPU data transfer and GPU device data transfer).
Despite the extra computations involved in kernel because of packing and unpacking, the overall GPU
performance might still be improved.