| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Even with that nice filter it won't be possible to get a pure red channel. The red channel is sensitive to NIR light, and NIR is transmitted by the..." | Read more » | about 8 years ago | |||
| aldrin | "Thank you, so much. I'm planning to use DB660/850 which is a Dual Bandpass filter for NIR and VIS. I understand that if I use it, I can Get Red+NIR..." | Read more » | about 8 years ago | |||
| liz | "Hey @kevinvivergy it's so great to hear from you! Here's the blue tagging assistance box that you will see when you click on "click here": ...W..." | Read more » | about 8 years ago | |||
| kevinvivergy | "Can do @liz, any in particular you would recommend? Not familiar with the system! " | Read more » | about 8 years ago | |||
| liz | "Hi @kevinvivergy, i have just tagged this note as an activity that others could try as well. I did this by adding the tag activity:open-air. If you..." | Read more » | about 8 years ago | |||
| warren | "Hi - would you mind making the title "How can i validate that the data I obtained using raspi noir camera are really NIR and NDVI?" so it's easier ..." | Read more » | about 8 years ago | |||
| mathew | "thanks! I've had some trouble getting the illumination aligned with the very tall illumination arm I made. Its complicated as well by the cable of..." | Read more » | about 8 years ago | |||
| richardbowman | "Hi @matthew, great that you've got some images :) Looking at your graticule, I think your illumination might be misaligned - the blue-yellow gradi..." | Read more » | about 8 years ago | |||
| cfastie | "Depending on the blue filter used, photos from a Pi NoIR camera would capture (instead of R,G,B) NIR+R, NIR+G+B, B+NIR+G. If you use a good red fil..." | Read more » | about 8 years ago | |||
| mathew | "Here are some image sets including a flat field calibration and scale from the PSL imaging. 20160923_PSL_Sphere_SET.zip " | Read more » | about 8 years ago | |||
| warren | "Oh great; @khufkens also shared that on this site! https://publiclab.org/notes/khufkens/11-02-2015/ov5647-raspberry-pi-camera-spectral-response-qua..." | Read more » | about 8 years ago | |||
| warren | "I found that V4L2 driver apparently makes it possible to use the raspberry pi camera in Firefox with webrtc, the API Spectral Workbench uses: https..." | Read more » | about 8 years ago | |||
| Siphirobe | "I was wondering the same thing, just with the PiNoIR camera since I am more interested in remote sensing of vegetation. " | Read more » | about 8 years ago | |||
| stef | "@warren After sleeping it over, realized that due to the no IR filter of the raspberry the bandwidth response will be different from the published..." | Read more » | about 8 years ago | |||
| stef | "@warren Here is a link http://www.khufkens.com/projects/ov5647-spectral-response/ and here is a zip file khufkens-pi-camera-response-curves-3342e..." | Read more » | about 8 years ago | |||
| warren | "That's a great thing to point out -- do you per chance have a link to the spectral bandwidth of the sensors? Thanks! " | Read more » | about 8 years ago | |||
| stef | "The BIG advantage of the Raspberry Pi is the use of the Sony IMX298 sensor whose spectral bandwidth is known and is 16 megapixel sensor. Much like ..." | Read more » | about 8 years ago | |||
| abdul | "@warren is there a chance to write a note about using a raspberry pi and post it as a build? I think others have had interest about this. Did we al..." | Read more » | about 8 years ago | |||
| warren | "Wow, this is super impressive!!! " | Read more » | about 8 years ago | |||
| mathew | "@plundh I'm not sure about this kit, but the OpenFlexure Microscope is moving towards a kit. More notes here: https://publiclab.org/tag/microscope ..." | Read more » | about 8 years ago | |||
| plundh | "Hi @Holger- I'm very interested in this, as well as a kit. Have you any updates on project? Best. -Peter " | Read more » | about 8 years ago | |||
| cfastie | "Most surfaces reflect both NIR and visible light. Ideally you would have some targets that reflect various amounts of both and you would know the p..." | Read more » | over 8 years ago | |||
| carolccarvalho | "Hi Chris, thanks again! Which are the surfaces that reflect both blue and NIR light? Could you give me some examples? And about mobius camera, i ..." | Read more » | over 8 years ago | |||
| warren | "There's now been a lot of work on this via WebValley and @cristoforetti -- take a look at #webvalley posts, and we managed to get it working! " | Read more » | over 8 years ago |