Raspberry Pi Camera - Raspberry Pi Forums

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i taking pictures of oxygen sensor film raspberry pi camera same (led) lightening conditions. convert rgb image hsi image. trying value of ''i'' (intensity) ''hsi'' image. problem every time same sensor film , same lightening conditions value of ''i'' different, should same. think because of little (auto) change in led brightness, absorption or reflection sensor film.
have idea how can fix camera sensitivity or exposure or other thing can me same value of ''i'' same conditions.

thanks

unless specify otherwise, rpi camera continually adjusts parameters autoexposure , auto-white-balance "pleasing" image. constant adjustment not ideal machine vision or science applications. consistent results, need fix shutter speed, iso setting (overall analog gain), , color balance (red , blue channel gain). see example: viewtopic.php?f=43&t=110051#p756720

in link you'll see reporting camera sensitivity gradually drops time fixed illumination levels. (it might bug related time-lapse mode, similar things reported in mode.) i'd curious if results agree, or not.


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