| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| jhondue123456 | "https://www.google.com/ " | Read more » | 8 months ago | |||
| cfastie | "I don't know the specs of the blue paper I use for custom white balance. The idea is to flood the blue channel with light (when using a blue filter..." | Read more » | almost 9 years ago | |||
| carolccarvalho | "@cfastie, I'm trying to do the white balancing manually using a Raspberry Pi and I need to know the number of this "pure blue" that you are using. ..." | Read more » | almost 9 years ago | |||
| cfastie | "Orangey yellow is good for blue filtered Infragrams. Turquoise blue is good for red filtered infragrams. Gray is bad. Below is a good red filtered ..." | Read more » | almost 10 years ago | |||
| liz | "hey @cfastie and @warren , is it true that orangey looking photos indicate a well white balanced blue filter infragram, while blue/greyish photos i..." | Read more » | almost 10 years ago | |||
| franknearir | "And/or issue a value around a selected area(s) " | Read more » | almost 11 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 » | almost 11 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 » | almost 11 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 » | almost 11 years ago | |||
| franknearir | "I thought plants will appear red using infragram? " | Read more » | almost 11 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 » | almost 11 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 » | almost 11 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 » | almost 11 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 » | almost 11 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 » | almost 11 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 » | almost 11 years ago | |||
| liz | "the step-by-step instructions with photos are really helpful, thanks! " | Read more » | about 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 » | over 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 » | over 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 » | over 11 years ago | |||
| warren | "Have you attempted to do dual-camera red/IR photos? Or even just a regular visible-light photograph of the same worm to get the red channel? What ..." | Read more » | over 11 years ago | |||
| cfastie | "The lack of differentiation really surprised me. The fact that hornworms fed a leaf-free diet turn blue is consistent with the idea that ß-carotene..." | Read more » | over 11 years ago | |||
| warren | "Time to begin scanning them with a spectrometer! Don't you think there ought to be more differentiation there? " | Read more » | over 11 years ago | |||
| cfastie | "I would encourage people to try to get the plants in their Infragram photos to be rather orange, like this: It might help to do the custom whi..." | Read more » | over 11 years ago |