| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "Can you share an example of your spectra? Are they on Spectral Workbench? What spectrometer did you use? Are you interested in a more precise scal..." | Read more » | about 7 years ago | |||
| kevwe09 | "download anthing for your mobile ketomob is the plc " | Read more » | about 7 years ago | |||
| kevwe09 | "Wapmon is a wap portal where users can get access to trending videos on the internet. This is a platform that has millions of videos up for users t..." | Read more » | about 7 years ago | |||
| reversevector | "There can be a lot of NIR contamination in the red channel when using RGN filters, especially in bright tropical sun at midday. To get higher NDVI ..." | Read more » | about 7 years ago | |||
| cfastie | "Are you interested in the difference between a blue filter and a red filter? A blue filter could be referred to as NGB (red is blocked and NIR repl..." | Read more » | about 7 years ago | |||
| reversevector | "I'm using an SJCam 4000, it's a cheap GoPro clone. It doesn't have custom white balance settings so I'm using incandescent with a red filter. I'm a..." | Read more » | about 7 years ago | |||
| suman | "I was curious to know which modified camera do you use? For my case, i am testing with Modified Mobius actioncam with wide angle A lens 87mm. If yo..." | Read more » | about 7 years ago | |||
| reversevector | "I'm also using VGYRM although I sometimes have to stretch the NIR value to get good results. " | Read more » | about 7 years ago | |||
| suman | "The macro was developed by Frank Aldiuos, a member of public labs. It basically is doing same thing as processing from the directory where all the ..." | Read more » | about 7 years ago | |||
| reversevector | "The Photo Monitoring plugin already has a command that generates NDVI from a folder full of images (Single image index processing from directory). ..." | Read more » | about 7 years ago | |||
| warren | "@gretchengehrke @nickshapiro @liz -- do you have a link to the EDGI page monitoring tool to see if we can answer this? There's also the Wayback Ma..." | Read more » | about 7 years ago | |||
| cfastie | "The text file attached above gives the correct RGB values for the NDVI_VGYRM lookup table. I put an image of the NDVI_VGYRM color gradient in my an..." | Read more » | about 7 years ago | |||
| Jtaw | "update : I used the lookup table above and did not give me a good result. I hope it is not the colormap used by infragram and there is something el..." | Read more » | about 7 years ago | |||
| Jtaw | "The lookup table will do for me. I'll try to generate an equation from this one. thanks a lot! " | Read more » | about 7 years ago | |||
| cfastie | "I think the algorithm to convert a blue- or red-filtered NIR photo to color NDVI is something like this: Start with a color photo in which one ch..." | Read more » | about 7 years ago | |||
| sujayj | "Thanks Chris " | Read more » | about 7 years ago | |||
| cfastie | "You can use any filter that blocks most blue and green light (all visible light other than red) and also passes a lot of near infrared light (somew..." | Read more » | about 7 years ago | |||
| warren | "Hi, would you mind looking through the FAQ to see if we can get some good documentation together about this additional question? If it doesn't exis..." | Read more » | over 7 years ago | |||
| KIAS | "Warren, I have downloaded csv file but then how will I be able to convert the RGB and wavelength values to calculate absorbance or transmittance? C..." | Read more » | over 7 years ago | |||
| stef | "Hi Would be usefull if we had a pix to view. " | Read more » | over 7 years ago | |||
| warren | "Hi, just wondering about my question on the screw in the photo below -- is that to unscrew the lens assembly itself? " | Read more » | over 7 years ago | |||
| Sigmund92 | "Thank you ! " | 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 » | over 7 years ago | |||
| warren | "This could be a few things, but the simplest is that you built a spectrometer with the camera rotated 180 degrees from the way it should be in the ..." | Read more » | over 7 years ago |