This page collects research on using #raspberry-pi based cameras (aka #pi-camera) to take [Infragram](/wiki/infragram) multispectral photos, for plant health analysis. It is supported in part by the [AREN project at NASA](/aren). ## Design goals Low cost, low complexity, easy to build and open source! Also see the [Image Sequencer](/image-sequencer) project which is designed to run on a Raspberry Pi for on-board image processing. To get a kit with this already set up on an SD card and/or Raspberry Pi camera, see: * [Infragram Pi Camera Kit](https://store.publiclab.org/products/infragram-pi-camera) * [Pre-flashed SD cards for Raspberry Pi cameras](https://store.publiclab.org/products/pi-builder-cards) ## Quick start [notes:grid:activity:pi-camera-setup] If yours is already assembled, just plug it in using a Micro USB cable (or battery pack) and it'll create a WiFi network called `00-PiCamera` -- password `publiclab` -- which you can log into from your phone or laptop. You'll quickly see streaming video, be able to take photos, timelapses, or videos, do motion triggered capture, and more. ## Questions Questions can be either frequently asked questions, or "next step" challenges we're looking to solve. [questions:raspberry-pi-infragram] ## Activities Activities show how to use this project, step by step. [activities:raspberry-pi-infragram] ...
| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| LaPa | "HI, What do you think about my last test? NoIR modulo cam+blue filter, WBgain red = 0.88 and WBgain blue = 0.57 " | Read more » | almost 9 years ago | |||
| LaPa | "I'll try to get blue > 30 and red < 200 changing the gain. At the moment I do not know how change the exposure. May be I have to read better ..." | Read more » | almost 9 years ago | |||
| cfastie | "Here is the range of NIR:VIS ratios for NDVI values between 0.2 and 0.8. " | Read more » | almost 9 years ago | |||
| cfastie | "That looks promising. I guess that PiCamera module is a useful tool. I think that photo is a little too yellow. The blue values for foliage are ver..." | Read more » | almost 9 years ago | |||
| LaPa | "Hi, I'm here again! I shoot a set of pictures by NoIR modulo cam and blue filter. I tryed finally different white balance. The photo that I post i..." | Read more » | almost 9 years ago | |||
| cfastie | "The Bayer filters determine how wavelengths are separated into the three color channels. This is how the camera can sense the balance between the t..." | Read more » | almost 9 years ago | |||
| poo | "this green photo don't Relevance to Bayer pattern Mr. @cfastie ? " | Read more » | almost 9 years ago | |||
| cfastie | "Black surfaces do not reflect much light, but they do reflect some. Some black surfaces might reflect more green than other colors, and other black..." | Read more » | almost 9 years ago | |||
| poo | "hi. I have a question. when I set a black paper or black thing in custom white balance, and then i take a photo, why my photo become a green photo?..." | Read more » | almost 9 years ago | |||
| LaPa | "ok, i have to solve some problems of remote link of the Raspberry before taking other photos. And, of course, I have to buy a red filter because th..." | Read more » | almost 9 years ago | |||
| cfastie | "LaPa, yes that would be very useful. It would also be useful if someone could do that with a red filter on the NoIR. Blue should be exaggerated whe..." | Read more » | almost 9 years ago | |||
| LaPa | "Hi Chris thank you for the suggestions! Do you think would it be a good idea take a set of photos (NoIR camera + blue filter) of the plant graduall..." | Read more » | almost 9 years ago | |||
| cfastie | "Those basil leaves should not be the same color as the flower pot. They need to be more orange. To get NDVI values in the appropriate range, the va..." | Read more » | almost 9 years ago | |||
| LaPa | "At the moment I took a photo two plants in sunny light. But I didn't manage to take another without gain because it became cloudy :(. Is it possib..." | Read more » | almost 9 years ago | |||
| LaPa | "Thank you cfastie, I seem that your post encourages me to keep on this way; I ask confirmation about this. Do you have any idea how to modify the p..." | Read more » | almost 9 years ago | |||
| cfastie | "That orange color of the leaves is promising. It should be even oranger. If you can put the plant in brighter outdoor light and take two photos -- ..." | Read more » | almost 9 years ago | |||
| LaPa | "anyway I try awbg. I wrote in the terminal "raspistill -awb off -awbg 0.88,0.97 and I took a picture of the tester and a two plants. The light was ..." | Read more » | almost 9 years ago | |||
| LaPa | "Actually I don't know if it is possible mount two modulo cam in 1 Raspberry because it has just 1 slot to mount a modulo cam. I'll find out more ab..." | Read more » | almost 9 years ago | |||
| cfastie | "It is not clear that the other respondents at the Pi forum understand what you are asking about. Using awb_gains will allow every photo to exaggera..." | Read more » | almost 9 years ago | |||
| LaPa | "What do you think about this way to proceed? https://www.raspberrypi.org/forums/viewtopic.php?p=856005#p856005 " | Read more » | almost 9 years ago | |||
| cfastie | "Thanks Erwan, It looks like awb_gains allows the red and blue channels to be adjusted relative to one another which is just what is needed. Howeve..." | Read more » | almost 9 years ago | |||
| Erwan | "hi, Did you trying this with picamera ? https://picamera.readthedocs.org/en/release-1.10/api_camera.html Here there are some possibility to parame..." | Read more » | almost 9 years ago | |||
| cfastie | "LaPa, The custom white balance procedure you refer to works only for certain cameras. A year ago it was not possible to set a custom white balance..." | Read more » | almost 9 years ago |