| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Maybe try this brute force version with an infrablue photo with healthy plants in it: 1) Select an area of foliage. 2) Calculate means for both ..." | Read more » | over 11 years ago | |||
| warren | "Chris, it occurs to me that we could try to come up with a way to generate an adaptation of NDVI based on a given un-white-balanced camera's photo ..." | Read more » | over 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 | |||
| warren | "Wow, fantastic. I also think that the new interface quickly exposes that my guess that this camera was producing some photosynthetically-based diff..." | Read more » | over 11 years ago | |||
| cfastie | "That's really good. I think people will appreciate the explanations. Nice clone of the color table. Maybe if it goes from yellow to magenta instead..." | Read more » | over 11 years ago | |||
| donblair | "Hi Chris -- great stuff! Changed the color bar in an attempt to match yours (haven't yet implemented the max / min values, yet), and added some ex..." | Read more » | over 11 years ago | |||
| cfastie | "The blue channel display is a good addition. It is not only a good diagnostic, but it helps everybody understand how the whole infrablue thing work..." | Read more » | over 11 years ago | |||
| donblair | "Chris -- I'm looking into generating the color table you're using -- it does indeed nicely distinguish above- and below-zero NDVI values -- and I'l..." | Read more » | over 11 years ago | |||
| cfastie | "Another good diagnostic tool for the Infrapix app could be display of a grayscale image of the blue channel of the infrablue photo. For example, th..." | Read more » | over 11 years ago | |||
| cfastie | "I think the new consistent relationship between NDVI values and color is good. If this causes some infrablue photos to produce boring (all the same..." | Read more » | over 11 years ago | |||
| donblair | "Follow-up -- the downside with having a set colortable for NDVI, from -1 to 1, is that a lot of the images are going to look pretty boring. One id..." | Read more » | over 11 years ago | |||
| donblair | "Update -- I've changed the infrapix code so that it always displays a color table that spans the full range of possible NDVI values (-1 to 1). Not..." | Read more » | over 11 years ago | |||
| donblair | "Jeff -- great, promising set of experiments here! Re: the color settings on the Infrapix app -- sorry, now I see (from your note, and in conversat..." | Read more » | over 11 years ago | |||
| cfastie | "In fact it was just one dirt road, State Route 8, the Denali Highway. 135 miles of dust. " | Read more » | over 11 years ago | |||
| warren | ":-) you would've gotten there a lot faster if you hadn't pulled over so often! You drive a lot of dirt roads!! " | Read more » | over 11 years ago | |||
| cfastie | "Liz, The complete process is probably not described anywhere. Okay, now it kind of is: http://publiclab.org/wiki/infrablue-white-balance This will..." | Read more » | over 11 years ago | |||
| cfastie | "Bilco1, Let us know what is not working. There are several people who have the process figured out and I'm sure we can get it working for you. The ..." | Read more » | over 11 years ago | |||
| bilco1 | "Wow good work! i am still yet to figure out how to use the plug in properly with a VIS and NIR Cameras :( " | Read more » | over 11 years ago | |||
| gonzoearth | "Wow. And good news about the plugin handling the larger file size! " | Read more » | over 11 years ago |