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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"A good way to get feedback about processing your infrared photos is to post the question with a sample image to the Public Labs Infrared Google Gro..." | Read more » over 3 years ago
"Hi - For Fiji installation instruction you should look at the Fiji website: http://fiji.sc/Fiji Keep in mind that you will need to install an older..." | Read more » over 3 years ago
"Several years ago I was thinking of how to build a DIY integrating sphere/monochromator setup but never pursued it. You would want something other ..." | Read more » over 3 years ago
"The current version of the plugin only outputs index (NDVI and DVI) images. The plugin only calibrates two bands, a visible and a NIR band and two ..." | Read more » over 3 years ago
"Hi Jacob, To check for aperture you could try another EXIF reader. Maybe "max aperture" is the same as "aperture" but I have no idea. When working ..." | Read more » over 3 years ago
"I haven't seen reflectance curves for the "standard" white balance cards that include the NIR region of the spectrum. My guess is they would differ..." | Read more » over 3 years ago
"Chris - The relationships are curvilinear but my preference is to try and figure out how to "correct" the JPEG pixel values to create a linear rel..." | Read more » over 3 years ago
"Hi Cindy - I'll start with the easy question first. The user guide can be downloaded from the plugin's GitHub repository: https://github.com/nedhor..." | Read more » over 3 years ago
"Unfortunately those values would only work if you had the same materials that I used. To get the reflectance values you would either need to fine s..." | Read more » over 3 years ago
"Hi aldehyde - Did you look at the user guide on Github: https://github.com/nedhorning/PhotoMonitoringPlugin that should have information about crea..." | Read more » over 3 years ago
"Mathew - Have you been able to find a reflectance plot for those paints? I looked but didn't see it. Other paints I was looking at a couple years a..." | Read more » over 3 years ago
"There have been a few requests over the years to add the capability of outputting different numbers of bands along the lines of what Chris mentione..." | Read more » over 3 years ago
"Hi raynerfdiez, Predicting the sun's elevation for a particular time and day is possible but you would probably want to find a software library th..." | Read more » over 3 years ago
"I made some progress with the plugin. I think I fixed the error related to creating the image pair list and RGB image error. I'm still working on c..." | Read more » almost 4 years ago
"Hi Rich - I'll look into this. I think I know what the problem is but the fix isn't easy. Dealing with the EXIF data has been a bit of a nightmare...." | Read more » almost 4 years ago
"HI Agustin - I put the images on my server here: https://resources.cbc.amnh.org/cbccloudstorage/public.php?service=files&t=12385a3a09a4879fcffc..." | Read more » almost 4 years ago
"This error will occur if you run the Create NDVI from Image plugin without having an image displayed in ImageJ. I added an error message to the nex..." | Read more » almost 4 years ago
"The panel order is not important as long as it's predictable and known. The "ideal" targets would probably be a few gray patches from bright to dar..." | Read more » almost 4 years ago
"At this point I haven't put much thought into ideal targets mostly because I don't have access to a spectrometer to measure and test different targ..." | Read more » almost 4 years ago
"When I first started thinking about this a couple years ago I figured auto-detecting the calibration targets would be key but that turned out to be..." | Read more » almost 4 years ago
"Yep - that's it " | Read more » almost 4 years ago
"Chris - I'll email you the master list with all of the reflectance values for each target since they aren't really useful without the images. You n..." | Read more » almost 4 years ago
"The image for this note with the blue color was probably a JPEG image white balanced using red paper. The raw image will have much higher values in..." | Read more » almost 4 years ago
"Hi Agustin - I have a feeling the problem with with the calibration targets you are using. The targets I sued for this note were scanned by a labor..." | Read more » almost 4 years ago

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