| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| suman | "Hello Ned, I tried using different exposure settings now, and its working, the pixels aren't saturated anymore. Thank you so much for your prompt ..." | Read more » | over 7 years ago | |||
| nedhorning | "Hi Suman - Using Analyze => Measure should work. It's not uncommon to have high pixel values for bright targets. In fact if the exposure isn't s..." | Read more » | over 7 years ago | |||
| suman | "Thank you so much for your prompt response Ned... " | Read more » | over 7 years ago | |||
| suman | "Ohh I get it now. Actually the data has 3 calibration target, but i plan to increase it to 5 targets. I also wanted to know, how i can manually me..." | Read more » | over 7 years ago | |||
| nedhorning | "Hi Suman - The values from 0 - 1 have been scaled from the original image. The reason I do this is that some image pixel values range from 0 - 255 ..." | Read more » | over 7 years ago | |||
| suman | "Dear Ned Horning, I calculated image calibration coefficients, using the reflectance data from department's spectrometer and 3 calibration targets..." | Read more » | over 7 years ago | |||
| cfastie | "In single-camera NIR systems with a filter that blocks all red or blue, the camera can be adjusted to emphasize the color channel capturing NIR. Th..." | Read more » | almost 8 years ago | |||
| nedhorning | "Hi - Using 440nm seem reasonable but I'd probably increase the NIR value to 760nm or beyond or something like that since the peak is probably beyon..." | Read more » | over 8 years ago | |||
| carolccarvalho | "Hello, @nedhorning, for the Rosco Roscolux #2007 Storaro Blue Gel Filter, with the following datasheet Could I just use the visible reflectance ..." | Read more » | over 8 years ago | |||
| Davidkao | "Thank you very much for the advice Chris and Ned, I have learned a lot. I will continue to this research, so if possible if I encounter any problem..." | Read more » | over 8 years ago | |||
| cfastie | "David, When using a blue (#2007) filter, the red channel records NIR and the blue channel records visible blue light which is used to compute NDVI...." | Read more » | over 8 years ago | |||
| nedhorning | "Hi David - This is an interesting project. The reflection of the glass should affect the results as long as the reflection is not in the area of yo..." | Read more » | over 8 years ago | |||
| Davidkao | "Hello, @nedhorning, I had recently been researching about NDVI and came across your amazing calibration plugin. It works great; however I have a fe..." | Read more » | over 8 years ago | |||
| nedhorning | "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 » | about 9 years ago | |||
| JacobNederend | "Thanks for the feedback. I think I misunderstood the function of this plugin. I thought I could calibrate my jpeg R/G/NIR images to a black, a gre..." | Read more » | about 9 years ago | |||
| nedhorning | "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 » | about 9 years ago | |||
| JacobNederend | "Hi Ned, I am really excited about the work you are doing here as it helps resolve some major issues with my grad studies. I have a few questions: ..." | Read more » | about 9 years ago | |||
| nedhorning | "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 » | about 9 years ago | |||
| aldehyde | "How to get target reflectance values for the visible and near-infrared wavelengths that correspond with the camera filter? Can I use?. 0.7529225,0..." | Read more » | about 9 years ago | |||
| nedhorning | "Hi aldehyde - Did you look at the user guide on Github: https://github.com/nedhorning/PhotoMonitoringPlugin that should have information about crea..." | Read more » | about 9 years ago | |||
| aldehyde | "Please help. If it is possible to describe all the work with the plugin. How to create "сomma-separated variable (CSV) file with the reflectance v..." | Read more » | about 9 years ago | |||
| nedhorning | "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 » | about 9 years ago | |||
| mathew | "Rosco manufactures outdoor-grade TV paints including 60% grey (TV white) and black (3%) and chroma colors (blue, green). They would be good choices..." | Read more » | about 9 years ago | |||
| admaltais | "Have you considered using reference charts used to calibrate green rooms in cinema? Some thing like this: labsphere - Reflectance Reference Targets..." | Read more » | over 9 years ago |