| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| nedhorning | "I don't have experience with lens mounted filters but you might get some feedback if you post your question on the plots-infrared list at http://pu..." | Read more » | over 8 years ago | |||
| nedhorning | "Hi manattta - Keep in mind that white balance and calibration are two different processes. White balance is used to adjust the in-camera processing..." | Read more » | over 8 years ago | |||
| nedhorning | "Interesting - My guess is that the preset white balance is responsible for the nice looking images. It would be interesting to record some RAW imag..." | Read more » | over 8 years ago | |||
| nedhorning | "At this time it is not possible to use geo-reference data. If there is sufficient interest in that functionality I could try to add it but it's not..." | Read more » | over 8 years ago | |||
| nedhorning | "Hi Alan, That sounds good. The first thing your son will realize is that I'm not a very talented programmer. I'm traveling until early next week b..." | Read more » | almost 9 years ago | |||
| nedhorning | "Hi - At this point the plugin does not subtract the NIR from the red. I've been doing this subtraction as part of my calibration tests: http://publ..." | Read more » | almost 9 years ago | |||
| nedhorning | "When I created the images above I scaled the output so and NDVI or DVI values less than 0 were set to 0. To include the full range of possible valu..." | Read more » | almost 9 years ago | |||
| nedhorning | "Hi Scott, It might be possible to calibrate a camera using a single color like a white balance card but at the very least you would need to know th..." | Read more » | almost 9 years ago | |||
| nedhorning | "Hi Roolark - Thanks for posting your comments and sharing your research. I don't know if you can post a link to your thesis but I'd be interested ..." | Read more » | about 9 years ago | |||
| nedhorning | "I guess it's not actually an extra step. When I do the regression I'm comparing the JPEG pixel values that I adjusted with my inverse gamma (un)cor..." | Read more » | about 9 years ago | |||
| nedhorning | "Chris, What you describe is part of what I'm trying to do. I want to take your description one step further so that the “new value” represents a p..." | Read more » | about 9 years ago | |||
| nedhorning | "Hi jdburnett – It sounds like you have quite a nice collection of cameras. It would be great to run some calibration tests with different cameras a..." | Read more » | about 9 years ago | |||
| nedhorning | "Chris - Here are some comments to your first round of questions: How does this apply to dual camera systems, or does it apply only to single camer..." | Read more » | about 9 years ago | |||
| nedhorning | "I think it might be possible to work on a simple calibration process that could be used to get decent NDVI values. I don't think there is much a us..." | Read more » | about 9 years ago | |||
| nedhorning | "Nice post. It would be neat to characterize some of these cameras. I made a half-hearted attempt a while back to access the necessary equipment but..." | Read more » | about 9 years ago | |||
| nedhorning | "I just updated the plugin and tested it. I suggest that Andre delete his version of the download Photo_Monitoring.jar and download the fresh versio..." | Read more » | over 9 years ago | |||
| nedhorning | "Hi Adresc4 - I'll try to help you get the plugin working. When you are running Fiji and you click on menu bar Plugins => Photo Monitoring do you..." | Read more » | over 9 years ago | |||
| nedhorning | "Hi Roolark - I don't have a spectral sensitivity curve for the A2200. I've been using LEDs to get a rough idea of spectral sensitivity but that's a..." | Read more » | over 9 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 » | over 9 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 » | over 9 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 » | over 9 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 » | over 9 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 » | over 9 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 » | over 9 years ago |