IMX8MP ISP Noise Reduction

[jheaffey]

Hi,

I am using the IMX8MP with a Sony IMX412 sensor. 

If I set the gain of the sensor high, there is a lot of noise in the resultant video, as one may expect.

I would like to reduce this noise as much as possible and have experimented with various features of the ISP within the IMX8MP.

Referring to the i.MX 8M Plus Camera and Display Guide, I have set the Denoising Pre Filter (DPF) settings so that the filter strength is maximal. After enabling the DPF, I do notice a slight improvement in noise reduction.

However I have also set the "denoise" level of the FILTER to be 10, which is the maximium, and it seems to have no effect.

I used the vvext tool to experiment with the FILTER settings and nothing seems to have any effect, and the video is still very noisy. As instructed in the Camera and Display Guide, I disabled the FILTER before adjusting the denoising level.

How  much of an effect is the FILTER expected to have? 

Are there any other methods to reduce noise?

I have found the SoftISP, which has "high quality noise reduction", I will also try that - i.MX8 Software Image Signal Processing | NXP Semiconductors

[Bio_TICFSL · Accepted solution]

Hello,

I think you can add to your image have some frequency filter since you  try all the filter testing with denoise that we provide. You can try the SoftISP  and tested, but i Guess this is a filter for frequency.

regards