nedhorning 24 research notes and 24 wiki edits | Joined about 6 years ago

I live and work from a home office in central Vermont but I work for the American Museum of Natural History's Center for Biodiversity and Conservation in New York City. I've been working with remote sensing and GIS for over 25 years and have an interest in photo-monitoring and am a strong proponent of open source software and the citizen science approach to collecting data.





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"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 » over 4 years ago
"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 » over 4 years ago
"I'm not sure what would cause that red spot. There isn't a legend or an image date so I'm assuming that the red spot is cooler than the surrounding..." | Read more » almost 5 years ago
"Hi Mercy - I think posting the user guide as a research note is a good idea. That way people can comment and also get a better idea what the Sky Ca..." | Read more » almost 5 years ago
"Hi Mercy - Thanks for the update. It's great to read about the progress. I tried to run Sky Cam on my Samsung Tab 2.0 and after the app starts I ge..." | Read more » almost 5 years ago
"I often use platforms that are moving so I use a fast shutter speed to reduce blur. I often shoot somewhere around 1/1000th of a second. You should..." | Read more » almost 5 years ago
"I usually use a gray target to white balance my NIR camera but I know some people use green vegetation like grass for the white balance. You can ex..." | Read more » almost 5 years ago
"The NIR and visible images look a little different and that could be caused by a few factors. If any of the camera settings change between images i..." | Read more » almost 5 years ago
"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 5 years ago
"Chris - I want to test to see how well calibration transfers between cameras and also between different camera settings and incident light (clear v..." | Read more » almost 5 years ago
"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 5 years ago
"Hi Jirka, This is an interesting tool. I'm not working on any participatory mapping projects at the moment but will try to test the questionnaires..." | Read more » almost 5 years ago
"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 5 years ago
"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 5 years ago
"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 5 years ago
"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 5 years ago
"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 5 years ago
"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 5 years ago
"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 5 years ago
"Hi Matthew, It's good to see this interest in PLOTS. A couple other open source (or nearly so) packages related to 3D mapping are: SURE (compatible..." | Read more » about 5 years ago
"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 5 years ago
"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 5 years ago
"Hi Roolark - Make sure you didn't disconnect or tear one of those thin ribbon cables. That's the only thing I can thing of that would cause that pr..." | Read more » over 5 years ago
"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 5 years ago

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