| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "The "histogram" is a frequency distribution of brightness values (DNs, 0-255) for all of the pixels in a photo, in this case for one color channel...." | Read more » | almost 4 years ago | |||
| ThomasTaufan | "This is the original image This is taken with WB 0% This is taken with WB 25% This is taken with WB 50% This is taken with WB 75% This is..." | Read more » | almost 4 years ago | |||
| ThomasTaufan | "I have done white balancing manually with the range from the left to the right I defined as 0% - 100%. This is taken with WB 0% This is taken w..." | Read more » | almost 4 years ago | |||
| ThomasTaufan | "The histogram of one of the channels was probably stretched (one or more extreme points at either end removed and the rest stretched to fill the 0-..." | Read more » | almost 4 years ago | |||
| cfastie | "I used the standard NDVI equation. The histogram of one of the channels was probably stretched (one or more extreme points at either end removed an..." | Read more » | almost 4 years ago | |||
| ThomasTaufan | "I have successfully used your color map, but the result is different. What is the equation of NDVI that you used? " | Read more » | almost 4 years ago | |||
| cfastie | "Is it by trial and error until the color of plant is like the one you provided? Yes, that would be a good way to do it. What the camera is pointed..." | Read more » | almost 4 years ago | |||
| ThomasTaufan | "How can I use your colormap in MATLAB? Thanks Chris " | Read more » | almost 4 years ago | |||
| ThomasTaufan | "Many cameras have a feature that allows a custom white balance. If the software for your camera does not allow this, it is not an option for you. ..." | Read more » | almost 4 years ago | |||
| cfastie | "What should I do to this pictures to improve the NDVI calculation? There is not much that can be done after the photo is taken to improve its abil..." | Read more » | almost 4 years ago | |||
| ritewayhtowing | "i Love this thought.. Motorcycle Tow Truck Service " | Read more » | about 4 years ago | |||
| kauemv2 | " Hello, I have a photo take with this kind of sensor: https://www.dropbox.com/s/7dddzda6at9d8a7/2019_0502_154807_246.JPG?dl=0 Hope that these one..." | Read more » | almost 5 years ago | |||
| kumarvirendran | " This is one the best blog for health. we are here give health-related best information. Those give you better health solution, which can be helpfu..." | Read more » | about 5 years ago | |||
| nedhorning | " I can think of two possible reason. The most obvious would be that the illumination changed and the other is that the sensor temperature change. S..." | Read more » | about 5 years ago | |||
| Corymbia | "Thank you both, I really appreciate your help. My tiles were far from perfect, but from next week on I will be able to test with six Spectralon sa..." | Read more » | about 5 years ago | |||
| cfastie | "Subtracting the blue channel from the red channel is a good first step for correcting for contamination of the red channel with NIR. With one parti..." | Read more » | about 5 years ago | |||
| nedhorning | "It's good you discovered that. Yesterday I started to write about the need to subtract the blue band (NIR) from the red band (red + NIR) so you get..." | Read more » | about 5 years ago | |||
| Corymbia | "Hi, I have some trouble previewing my processed DNG images in Matlab, but the channel values are similar to the ones in your image. Since the red c..." | Read more » | about 5 years ago | |||
| nedhorning | "I used this following dcraw command: dcraw -D -W -4 Image1.ORF to create this image which has been scaled to 16-bit integers: https://drive.googl..." | Read more » | about 5 years ago | |||
| nedhorning | " I have to run out now but will try to make time to check this in the morning. It's also possible it's due to the nature of the filter and after ca..." | Read more » | about 5 years ago | |||
| Corymbia | "Sure, I've just uploaded ORF files for all three images to the google drive (link at the end of my post). Unfortunately I couldn't find any inform..." | Read more » | about 5 years ago | |||
| nedhorning | "Can you post one of your RAW images? I looked at Image1.dng and that shows the Bayer pattern so it needs to go through a debayer process to create ..." | Read more » | about 5 years ago | |||
| Corymbia | "How do you make sure the white balancing step is omitted? I tried that myself (see table 3 and figure 5 in my note), but the resulting NDVI values ..." | Read more » | about 5 years ago | |||
| nedhorning | "I use RAW pixel values for calibration analysis and since white balance doesn't impact RAW values I don't usually worry about it. If you want to us..." | Read more » | about 5 years ago |