| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "3500 views in the last 10 hours. Your other note on the camboard tests also has 5k views. You must have the magic touch. However, none of your othe..." | Read more » | over 10 years ago | |||
| cfastie | "Wow, it got dark fast, but it looks like you got all 20 of them in place. Nice work. " | Read more » | over 10 years ago | |||
| cfastie | "Jane is looking good. Do you have any more Janes? Congrats on the new fan club. You're getting 100-200 views per hour. I hope they are all friend..." | Read more » | over 10 years ago | |||
| cfastie | "Great progress today, Nate. I just watched the 15th panel go up. Excellent broadcasting. " | Read more » | over 10 years ago | |||
| cfastie | "Jeff, Our goal is to have 1) a red channel which records how much NIR is reflecting from plants, and 2) a blue channel which records how much blue ..." | Read more » | over 10 years ago | |||
| cfastie | "Ned, The G11 photos in the panel above were recorded in camera raw. According to my naïve model of what camera raw does, it should be possible to t..." | Read more » | over 10 years ago | |||
| cfastie | "The relative amounts of NIR vs visible light in each channel is definitely a big and important unknown. The camera can't do anything to change that..." | Read more » | over 10 years ago | |||
| cfastie | "There might be some math magic that will help, but that is beyond me. It will be important to check that whatever math is done, the resulting index..." | Read more » | over 10 years ago | |||
| cfastie | "That's a good thing to test, and it's easy with your Superblue G11 which has two custom white balance presets, one for a blue surface in the shade ..." | Read more » | over 10 years ago | |||
| cfastie | "kykytos, This is a really good question. Lots of blue light can pass through a #2007 filter, so a white light viewed through the filter will appear..." | Read more » | over 10 years ago | |||
| cfastie | "Maybe try this brute force version with an infrablue photo with healthy plants in it: 1) Select an area of foliage. 2) Calculate means for both ..." | Read more » | over 10 years ago | |||
| cfastie | "kykytos, you are correct. The equation (NIR-R)/(NIR+R) is the standard one for NDVI. Substituting blue for red as in (NIR-B)/(NIR+B) also works wel..." | Read more » | over 10 years ago | |||
| cfastie | "TedF, Good design. Just drag and drop photos to where the cursor is in the edit window. Blocks (pulleys) will help a lot to keep it level, especial..." | Read more » | over 10 years ago | |||
| cfastie | "I haven't wrapped my head around how to make a DIY hyperspectral image. I guess the idea is to make a photo of an object by capturing only a very n..." | Read more » | over 10 years ago | |||
| cfastie | "The lack of differentiation really surprised me. The fact that hornworms fed a leaf-free diet turn blue is consistent with the idea that ß-carotene..." | Read more » | over 10 years ago | |||
| cfastie | "How does a 99 cent app know the wind speed? Do you have to point the camera at a flag? Dangle the phone on a string? Or does it listen until it hea..." | Read more » | over 10 years ago | |||
| cfastie | "Huge Breakthrough! We love sliders! Here is NBG of an astroturf putting green (R*S, B*1.3, G*0.1, WHEN S=100): And here is ENDVI = ((R+G)-..." | Read more » | over 10 years ago | |||
| cfastie | "Charlie: The images everyone is working on are single photos from the cameras (or multispectral versions). The problematic color variations are wit..." | Read more » | over 10 years ago | |||
| cfastie | "Camera orientation and position (relative to the photo scene) is reconstructed when a structure-from-motion model is made using lots of photos take..." | Read more » | over 10 years ago | |||
| cfastie | "This is great information. In the first GIF, the second largest circle, near the top, has a nice large patch of pure Trapa that appears to be simil..." | Read more » | over 10 years ago | |||
| cfastie | "I would encourage people to try to get the plants in their Infragram photos to be rather orange, like this: It might help to do the custom whi..." | Read more » | over 10 years ago | |||
| cfastie | "In the camera you use in this example, press "Menu" while filling the scene with the blue paper. Then press Function/Set to begin taking photograph..." | Read more » | over 10 years ago | |||
| cfastie | "Tom, Both WarnerLkVis7075.JPG and WarnerLkVis7136.JPG are there (case sensitive). Their NIR matches (2214 and 2275) are there too. The NIR images..." | Read more » | over 10 years ago | |||
| cfastie | "philippg, Ned Horning has been working on these images, and has tried some segmentation approaches, but maybe nothing fractal or with spectral cohe..." | Read more » | over 10 years ago |