Here we presents image demosaicing results for widely used debayer algorithms and compare CPU and GPU implementations.
We consider the following debayer algorithms: bilinear (AN3 from Intel IPP library), AHD (Adaptive Homogenuity Direction, from Intel IPP), HQLI (High Quality Linear Interpolation), DFPD (Directional Filtering and a Posteriori Decision).
Debayer Benchmarks on CPU and GPU
In that testing we measured computation time with and without host-to-device and device-to-host transfers to compare throughput for the above algorithms at CPU and GPU. Here we present averaged results for 8-bit images with 4K resolution (3840×2160). PSNR and SSIM results are calculated for standard Kodak data set.
Popular RAW converters consider AHD (AHDMF) algorithm to be industry standard. We have found how to get better results and not at the expense of performance. Here you can see moire patterns for these algorithms.