questions about cnf (chroma noise filter)

[Inory-Megumi]

I am confused whether cnf (chroma noise filter) works cause it uses a weird algorithm which i know, coming from a patent.Have you tried to figure out the effectiveness of chroma noise filter?thanks!

[Kuo-TingKai]

Do you mean this patent ?
Maybe we can use something like PSNR as the criterion and compare CNF to another filter such like DCT-CNR.

But I wonder that how we can distinguish whether we reduce the chrominance or luminance noise by these filters?

[Kuo-TingKai]

I am confused whether cnf (chroma noise filter) works cause it uses a weird algorithm which i know, coming from a patent.Have you tried to figure out the effectiveness of chroma noise filter?thanks!

Or we can refer to these C and C++ implementation of chroma noise filtering algorithms.

[Inory-Megumi]

I am confused whether cnf (chroma noise filter) works cause it uses a weird algorithm which i know, coming from a patent.Have you tried to figure out the effectiveness of chroma noise filter?thanks!

Or we can refer to these C and C++ implementation of chroma noise filtering algorithms.

Thanks but seems it's a temporal filter

[Inory-Megumi]

Do you mean this patent ? Maybe we can use something like PSNR as the criterion and compare CNF to another filter such like DCT-CNR.

But I wonder that how we can distinguish whether we reduce the chrominance or luminance noise by these filters?

usually chroma noise is dealt on the UV plane of a image and luma noise is dealt on the Y plane

[xiaofu-code]

I am wondering that which paper does the CNF(chroma noise filter) come from?patent is not the source paper of CNF