| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Indeed, that last Mobius with a 2007 did not work well for me either. What were the lighting conditions? I tried to stretch the histogram a bit, bu..." | Read more » | over 10 years ago | |||
| cfastie | "Tom, Yes, meaningless was not the best word choice. The real surprise was that the non-plants consistently had NDVI values higher than plants. That..." | Read more » | over 10 years ago | |||
| ttaylor | "Chris, re the Mobius Rosco2007 image, some comments and questions. By "meaningless" do you mean that the pine board looks so much like the living p..." | Read more » | over 10 years ago | |||
| mathew | "I'm matching your process from here- got to go grab the rosco filter packs from storage, but I just printed up that beautiful mount. " | Read more » | over 10 years ago | |||
| franknearir | "And/or issue a value around a selected area(s) " | Read more » | over 10 years ago | |||
| warren | "That's a great feature request. I think we could make it work; would you mind creating an issue for it here: http://github.com/Pioneer-Valley-Open-..." | Read more » | over 10 years ago | |||
| franknearir | "Does the software also give an NDVI value? Is there any software that does analyze an image that also provides the actual NDVI values? Thanks " | Read more » | over 10 years ago | |||
| warren | "After processing they will. For example, upload the orange-ish photo to http://infragram.org/static/sandbox/ and click "NDVI" then "Color" and you'..." | Read more » | over 10 years ago | |||
| franknearir | "I thought plants will appear red using infragram? " | Read more » | over 10 years ago | |||
| nathanathan | "I've started experimenting with phosphorescent paint. Here's a link to a note on what I've done so far. " | Read more » | over 10 years ago | |||
| nathanathan | "I recently ordered a smartphone spectrometer, measuring glow in the dark pigment spectra seems like a fun project to try it out on. I'll give it ..." | Read more » | over 10 years ago | |||
| cfastie | "For some reason it's hard to find spectra of glow-in-the-dark pigments. Really, a thousand Public Lab spectrometers out there and no one has done t..." | Read more » | over 10 years ago | |||
| nathanathan | "I would like to know how glow in the dark paint compares to LEDs. Postcards with glow in the dark rainbows painted on them could be packaged with s..." | Read more » | over 10 years ago | |||
| cfastie | "Would the LED have to be placed outside the entrance slit? Otherwise the grating would form an image of the entire bulb. Standard single color LED..." | Read more » | over 10 years ago | |||
| warren | "I'm interested in something similar for spectrometer exposure calibration -- putting an LED and battery inside each spectrometer, on one side, so y..." | Read more » | over 10 years ago | |||
| warren | " " | Read more » | almost 11 years ago | |||
| cfastie | "The relative amounts of NIR vs visible light in each channel is definitely a big and important unknown. The camera can't do anything to change that..." | Read more » | almost 11 years ago | |||
| warren | "I guess the WB introduces a big unknown about the relative amounts of NIR vs visible light. One way the NIR and VIS might mix in blue is that perha..." | Read more » | almost 11 years ago | |||
| cfastie | "kykytos, This is a really good question. Lots of blue light can pass through a #2007 filter, so a white light viewed through the filter will appear..." | Read more » | almost 11 years ago | |||
| liz | "the step-by-step instructions with photos are really helpful, thanks! " | Read more » | almost 11 years ago | |||
| kykytos | "Hi, I don't understand how can be blue color the Rosco #2007 VS Blue filter when it allows blue light to pass. We see the color of the objects beca..." | Read more » | almost 11 years ago | |||
| warren | "Well, a common way to do hyperspectral is to just collect a whole row of spectra (y dimension is your row of pixels, x dimension is wavelength) and..." | Read more » | almost 11 years ago | |||
| Bob | "... and I always run to grab my regular camera when I see a Sphinx moth flying in the yard! " | Read more » | almost 11 years ago | |||
| cfastie | "I haven't wrapped my head around how to make a DIY hyperspectral image. I guess the idea is to make a photo of an object by capturing only a very n..." | Read more » | almost 11 years ago |