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Radial Falloff What you are seeing is known as radial falloff. The coloration is a result of the green-magenta compensation common to most color correction schemes in RGGB (bayer) sensors. Basically, the amount of light lost as you move to the edges of the frame is normal and more green is lost because there is more green sensitivity. Flat Field Correction ...


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An IR filter reduces a portion of visible light as well. You would do well to ask for the transmission curves at the camera detector with and without the filter. Determine what spectral range you need to cover in your "light" and "background" regions. By example, when you cannot accept that an IR filter will cut 10% of the visible dark red region of your ...


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It seems I found the cause of this problem, or at least a solution for it. The PICam sensor comes with a lens shading correction table, in form of an RGGB array, that may cause, or solve this color shifting. This setting isn't accessible in the official library, you must install this commit in order to access it : https://github.com/waveform80/picamera/pull/...


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I've had success in the past with CCTV lenses mounted to webcams in place of their original lenses. The tricky part is securely and accurately mounting the two together - we had a part machined for one application, but I've also used the front of a dead CCTV camera and lots of glue. The positioning has to be correct in three dimensions to work well. As ...


1

It would be possible to use any small telescope or monocular or one side of binocular. You figure out a way to allow mount one of these devices to your webcam. The lens of the webcam is positioned to peer into the telescope/binocular. This method is called "afocal". The name comes from the fact that the image forming rays from the telescope/binocular exit ...


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There is a full module of python code that you can use to control everything from the exposure, to the color balance, shutter speeds and such. You can find all the goodies here: http://picamera.readthedocs.io/en/release-1.12/index.html I have used the older camera (which had a far less profound sensor) in some pretty unusual ways. You can control a lot ...


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