| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hi, Pascal - this seems like a great project. Please check out some of the thoughts on digitization of images from my comment on Sreyanth's proposa..." | Read more » | over 10 years ago | |||
| mathew | "This is really excellent. can you talk more about your anaerobic production method? have you done some temperature control on it? " | Read more » | over 10 years ago | |||
| eustatic | "woah! awesome. " | Read more » | over 10 years ago | |||
| nathanathan | "I think the Camera FV-5 Approach of adding multiple image might work. The noise, if it's randomly distributed, should just sum to gray, while the i..." | Read more » | almost 11 years ago | |||
| warren | "Real long-exposure would be great; I think Camera FV-5 uses software based long exposure -- it just adds together a lot of half-second exposures, s..." | Read more » | almost 11 years ago | |||
| cfastie | "I think there are some apps which allow long exposures (Camera FV-5). I guess the calibration photo of the paint would have to use the same settin..." | Read more » | almost 11 years ago | |||
| funkycbj | "Light is transmitted but it is diffusely scattered past a certain depth, which seems to be ~7mm. The minimum thickness increases with the size of ..." | Read more » | almost 11 years ago | |||
| nedhorning | "Thanks for the suggestion. Maybe a teflon sheet is the way to go although I don't have any experience with these. Some of the thin sheets seem tran..." | Read more » | almost 11 years ago | |||
| funkycbj | "Krylon extra flat black spray paint is diffuse and spectrally flat across the vis-nir. A small sheet of teflon isn't too expensive and works great ..." | Read more » | almost 11 years ago | |||
| nedhorning | "I have been making some progress toward standardized calibration targets. Does anyone viewing this know of a source for inexpensive paints/coatings..." | Read more » | almost 11 years ago | |||
| nedhorning | "Hi Thorsten, Glad to hear you're making progress. When you run the plugin are you specifying that the channel from the visible image to use for th..." | Read more » | about 11 years ago | |||
| Thorsten | "Ned, I followed your advice and now have processed my first dual camera images (RGB and 850nm IR) using your PhotoMonitoring plugin, which works li..." | Read more » | about 11 years ago | |||
| nedhorning | "Is this your conclusion or do we have to test lots of other materials that commonly show up in the NDVI images we take? I have looked at a lot of..." | Read more » | about 11 years ago | |||
| nedhorning | "Chris, So many questions... I think more testing is necessary but I'll take a shot at answering each question. I'd like to hear what other folks th..." | Read more » | about 11 years ago | |||
| cfastie | "Ned, The NDVI image made from the Rosco 2008 photo by stretching the histograms is surprisingly similar to your calibrated NDVI image from the red ..." | Read more » | about 11 years ago | |||
| cfastie | "Ned, this is good evidence that some materials, like grass clippings and pine boards, will be more easily distinguished from live green plants in N..." | Read more » | about 11 years ago | |||
| nedhorning | "If you use a dual-camera setup I suggest using an unmodified camera and a NIR-pass (visible cutoff) filter for the other camera. Some people use un..." | Read more » | about 11 years ago | |||
| Thorsten | "Ned, thanks! Confusion is good in most cases! :-) I think I'll give it a try and report. For such a setup do you propose the filters you used (bl..." | Read more » | about 11 years ago | |||
| cfastie | "This is really good information. Another thing that might make red filters a good choice is that it is easier to make a red filter than an infrablu..." | Read more » | about 11 years ago | |||
| nedhorning | "Hi Thorsten, Sorry for the confusion. Some of the non-linearity between the response of the red and blue filter should be explained in the post I d..." | Read more » | about 11 years ago | |||
| Thorsten | "Dear Ned et al., I am pretty new to all this and on my way to convert my camera for NDVI mapping. After reading this post I am little confused: bl..." | Read more » | about 11 years ago | |||
| mathew | "This is great, Ned-- thanks for illustrating it with your examples. The stark difference between NDVI of dead grass in the red channel is a pretty..." | Read more » | about 11 years ago | |||
| nedhorning | "One drawback of using the red filter is that the red part of the bayer filter passes more NIR than the blue or green parts. I'm looking into ways t..." | Read more » | about 11 years ago | |||
| patcoyle | "Interesting work. Thanks Ned. " | Read more » | about 11 years ago |