Intel denoising filter 'Open Image Denoise'

Intel has a type of filtering which works with all Intel64 arch cpus and Apple. Basically the filter enhanced the visual quality in some steps which employ the famous OneApi ai library.

Example:

#include <OpenImageDenoise/oidn.h>
...
// Create an Intel Open Image Denoise device
OIDNDevice device = oidnNewDevice(OIDN_DEVICE_TYPE_DEFAULT);
oidnCommitDevice(device);

// Create a filter for denoising a beauty (color) image using optional auxiliary images too
OIDNFilter filter = oidnNewFilter(device, "RT"); // generic ray tracing filter
oidnSetSharedFilterImage(filter, "color",  colorPtr,
                         OIDN_FORMAT_FLOAT3, width, height, 0, 0, 0); // 
oidnSetSharedFilterImage(filter, "albedo", albedoPtr,
                         OIDN_FORMAT_FLOAT3, width, height, 0, 0, 0); // a
oidnSetSharedFilterImage(filter, "normal", normalPtr,
                         OIDN_FORMAT_FLOAT3, width, height, 0, 0, 0); // a
oidnSetSharedFilterImage(filter, "output", outputPtr,
                         OIDN_FORMAT_FLOAT3, width, height, 0, 0, 0); // d
oidnSetFilter1b(filter, "hdr", true); // beauty image is HDR
oidnCommitFilter(filter);

// Filter the image
oidnExecuteFilter(filter);

// Check for errors
const char* errorMessage;
if (oidnGetDeviceError(device, &errorMessage) != OIDN_ERROR_NONE)
  printf("Error: %s\n", errorMessage);

// Cleanup
oidnReleaseFilter(filter);
oidnReleaseDevice(device);

In this example we can see the denoising in C99 api in actions, employs in the first step additionally images for ‘beauty’, then executes the filter and finally checks for error + general cleanup.

Links
https://spec.oneapi.io/versions/latest/elements/oneART/source/oidn-spec.html

Intel denoising filter ‘Open Image Denoise’

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