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Getting dark...purple color

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Getting dark the image my IMX291 NVP2441 camera board gets more and more purple coloured.


From my part it could turn to BW now. Can I adjust in OSD the moment it start to turn to to BW?


It it possible to prevent in OSD the purple coloration too?



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I had a similar problem not long ago.

Turned out the IR-cut filter was defective.


Most modern cameras use IR light to show night time images in black&white, but when at day-time having color images, the IR light needs to be blocked or else the IR light will be visible in dark areas (black areas will be purple-ish).

To prevent this, the cameras has a mechanical IR cut filter, that physically places a filter in front of the imager.

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