Question: Which Public Lab kit is best for testing the impact of different camera settings?

MaggPi is asking a question about spectrometry: Subscribe to answer questions on this topic

MaggPi asked on April 26, 2018 05:38
154 | 1 answers | #16213


I am requesting advice on which Public lab kit would be best for testing the impact of different camera settings.

The goal is to adapt a public lab kit to help answer spectrometer camera optimization questions (see for example: https://publiclab.org/questions/warren/09-28-2016/upgrade-a-diy-spectrometer-with-a-raspberry-pi-camera and https://publiclab.org/notes/cedarlodge/03-07-2018/raspberry-pi-spectrometer-gui)

I plan to use a Raspberry Pi (v3), Pi visible (v2)/NOIR cameras and picamera/opencv software with a public lab spectrometry kit. Public lab spectrometer kits range from desktop 3.0 (intended for webcam), lego kit (intended for both webcam or v1 camera) and flexible (intended for mobile phone cameras). While I understand that the kits are priced for different applications, is there a comparison table available that lists the specifications and advantages/disadvantages of each design? Particularly interested in wavelength resolution, wavelength accuracy/ repeatability, spectral range and ability to match to Pi v2 cameras for each design.

Also interested if anyone is interested in collaborating on testing different kits with Raspberry Pi v2 cameras, writing code to cycle thru different exposure settings or testing options for different (manual) camera settings.



2 Comments

WOw @MaggPi, this is really important work! I'm leaving this link by @haines241 as a comment VS a direct answer because it has an interesting experimental set-up for testing the performance of phone cameras -- and the phone's camera settings -- under various lighting conditions: https://publiclab.org/notes/haines241/03-06-2018/smart-form-badge-lighting-analysis-experiments


I'd love to see maybe a grid of comparison on different settings! This was an interesting example of that:

https://publiclab.org/notes/warren/09-13-2013/leaffest-infragram-camboard-batch-tests


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1 Answers

For what it's worth, the Lego Spectrometer page lays out some reasons why the lego version is going to replace the 3.0 version: https://publiclab.org/wiki/lego-spectrometer So maybe lego is best! But i'm interested -- one thing that could be tested is also the length of the spectrometer. @cfastie has done some great length tests and with a much nicer Rasberry Pi camera these become relevant! I think Chris's post is this one, but maybe he can correct me -- i searched for a bit but this was a few years ago: https://publiclab.org/notes/cfastie/2-19-2013/ebert (also nice lego work here: https://publiclab.org/notes/cfastie/2-5-2013/grating-angle)


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