Morphological Antialiasing Filter

Filter

RIF_IMAGE_FILTER_MLAA

Description

The filter performs Morphological Antialiasing (MLAA) for input image. MLAA is an image-based, post-process filtering technique which identifies discontinuity patterns and blends colors in the neighbourhood of these patterns to perform effective anti-aliasing.

Parameters

Parameter	Type	Input/Output	Description
meshIDImg	image	input	The image containing IDs of meshes. Used to find boundaries of objects. The parameter is optional. If used, can improve finding of boundaries.
normalsImg	image	input	The image containing normal vectors in the [-1, 1] range. Used to find boundaries of objects. The parameter is optional. If used, can improve finding of boundaries. Use the normalTreshold parameter to adjust the sensitivity of the boundaries detector.
depthImg	image	input	The image containing depth value. Used to find boundaries of objects. The parameter is optional. If used, can improve finding of boundaries. Use the depthTreshold parameter to adjust the sensitivity of the boundaries detector.
colorTreshold	float	input	The color threshold of the detector of boundaries. The colors differing more than the threshold will be recognized as the boundary and subjected to smoothing. A greater value corresponds to a large color difference needed to trigger. Default value is 0.05.
normalTreshold	float	input	The normals threshold of the detector of boundaries. The scalar product of the normal vectors near the border is less than the threshold will be recognized as the boundary and subjected to smoothing. The smallest value corresponds to a large normal difference needed to trigger. Default value is PI/8.
depthTreshold	float	input	The depth threshold of the detector of boundaries. The depths differing more than the threshold value will be recognized as the boundary and subjected to smoothing. A greater value corresponds to a large depth difference needed to trigger. Default value is 0.1.

Usage Example

rif_image_filter filter = nullptr;
rifContextCreateImageFilter(context, RIF_IMAGE_FILTER_MLAA, &filter);
rifImageFilterSetParameterImage(filter, "meshIDImg", meshIDImage);
rifImageFilterSetParameterImage(filter, "normalsImg", normalsImage);
rifImageFilterSetParameterImage(filter, "depthImg", depthImage);
rifCommandQueueAttachImageFilter(queue, filter, inputImage, outputImage);
rifContextExecuteCommandQueue(context, queue, nullptr, nullptr, nullptr);