SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
The advanced noise filter NSF4v decomposes the input image into low-frequency, mid-frequency, and high-frequency bands first and then filter out the noise in frequency domain. NSF4v can adapt its noise filtering strength to local image intensity according to the user programmable noise threshold registers. NSF4 is also able to adjust its strength according to the amount of previously applied lens shading correction gains with a user programmable approximate radial model.
NSF4V includes the function to generate a histogram on the raw input data and dynamic white balance at the output independent of NSF4V core noise filtering function.