I think you've missed that there is both the Camera Front End (CFE) that you've shown the Media Graph for, but also the PISP backend. See sections 2.1 and 2.2 of https://datasheets.raspberrypi.com/came ... cation.pdf
vc4's ISP always had the issue that stats were generated at the same time as the output image data, so exposure/gain/white balance control loops were always applied to the next frame.
PISP generates the stats in the CFE, along with unpacking the MIPI formats, and optional scaling (normally in the Bayer domain, but currently not used). See figure 5 on page 18.
The backend then performs the heavier lifting of the image processing, and produces YUV or RGB output. See figure 11 on page 64.
vc4's ISP always had the issue that stats were generated at the same time as the output image data, so exposure/gain/white balance control loops were always applied to the next frame.
PISP generates the stats in the CFE, along with unpacking the MIPI formats, and optional scaling (normally in the Bayer domain, but currently not used). See figure 5 on page 18.
The backend then performs the heavier lifting of the image processing, and produces YUV or RGB output. See figure 11 on page 64.
Statistics: Posted by 6by9 — Tue Nov 12, 2024 11:56 am