True motion based temporal-spatial IIR filter for video

摘要

To denoise video data, a temporal IIR filter is applied to video data. The temporally filtered frame is used as a guide to spatially filter the video data without introducing temporal artifacts. The spatially filtered frame can then be temporally filtered again using a temporal IIR filter. The results of the second temporal filtering can then be used as a guide to eliminate noise that the spatial filter did not eliminate.

主权项

1. A method comprising:
using a processor, applying a temporal Infinite Impulse Response filter to a current frame to generate a first reference frame; using the first reference frame to apply a temporal-guided spatial bilateral filter to the current frame to perform denoising on the current frame without introducing temporal artifacts, thereby producing a second reference frame; applying a temporal IIR filter to the second reference frame to produce a third reference frame; and using the second reference frame and the third reference frame to perform additional denoising on the second reference frame, thereby producing an output frame.