Colormaps are used to show details in monochrome (greyscale) images, by showing pixel intensity values using a wide range of colors instead of just from black => white. This makes finer details easier to see, although it may make it harder for colorblind viewers to read depending on the colors chosen. See https://publiclab.org/ndvi-gradients for a collection of common and useful colormaps by @cfastie. Some colormaps are not linear, meaning they use a set of color changes in one region of the scale to emphasize features with approximately that brightness. Colormaps are also known as "lookup tables" or LUTs, and the process overall is sometimes known as "false color" (alongside other color compositing techniques). Learn more in these posts: [notes:grid:colormap]...
| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| jhondue123456 | "https://www.google.com " | Read more » | 23 days ago | |||
| shahdharam7 | "@peter_mansson1 Nice work. The final goal here is to analyze the nutrient effect. Right? The normal camera (Raspberry pi camera) can also get th..." | Read more » | over 2 years ago | |||
| achita_ea | "Hi @petter_mansson1 I can not use Cloud Upload in MainNDVI Thise error missing 2 required positional arguments : 'preNDVIFilepath' and 'timestamp' ..." | Read more » | about 3 years ago | |||
| patalbright | "Have you found your answer already or is there anyone else with a feedback on how to know when one found the best balance? :) pretty hard to find i..." | Read more » | over 3 years ago | |||
| nstarli | "Hi Peter, you explained that you used the GUI to manually find your proper balance, however how did you actually quantify what made a good photo? " | Read more » | over 4 years ago | |||
| evan_lesmez | "Lol wish I had saved the blue filter it shipped with " | Read more » | over 4 years ago | |||
| evan_lesmez | "This is awesome I am working on implementing this into analyzing my hydroponic garden. Just got my piNoIr camera running & am looking through y..." | Read more » | over 4 years ago | |||
| warren | " Hi! Just noting that this software stack I mentioned above is configured to run headlessly and to send video over WiFi, including NDVI processing:..." | Read more » | almost 5 years ago | |||
| petter_mansson1 | "I use a combination of PILLOW, numpy and Matplotlib. You can also find all my camera settings in https://github.com/PiddePannkauga/ndviMachine. It ..." | Read more » | about 5 years ago | |||
| jmdavison12 | " Thanks Petter, I'm using a headless Raspberry Pi so I don't have the option of writing a GUI application (without networking the stream and severe..." | Read more » | about 5 years ago | |||
| petter_mansson1 | "Here is my repo for the GUI application. Run the script on your raspberry pi. Think you need to install a Tkinter library. At first I only created ..." | Read more » | about 5 years ago | |||
| petter_mansson1 | " I wrote a simple GUI application using TK for Python with 2 sliders to control AWB gains. That was my approach to finding a good balance. I don't ..." | Read more » | about 5 years ago | |||
| jmdavison12 | " " | Read more » | about 5 years ago | |||
| jmdavison12 | " Hi Peter, What red/blue gains did you use for these photos (I assume you are using picamera)? I know that lighting conditions vary and white bala..." | Read more » | about 5 years ago | |||
| jmdavison12 | "Dang, nice! Didn't realize this was possible with the blue filter that ships with the piNoIR. I can't believe how clear these results are. I'm als..." | Read more » | about 5 years ago | |||
| petter_mansson1 | " Hi Jacob, Cool! It would be interesting to compare ideas. I'm taking a single image, using the blue filter that came with the NoIR camera module..." | Read more » | about 5 years ago | |||
| jmdavison12 | " Wow, great work Peter! Have you not included the non-filtered image used to generate the single channel NDVI? or are you doing 'single image' NDVI..." | Read more » | about 5 years ago | |||
| ankurp836 | " Thanks for buddy Post " | Read more » | about 5 years ago | |||
| warren | "that'd be awesome. The image workflow we've built is javascript based, but it's also possible to use Pi Builder to produce reproducible python tool..." | Read more » | about 5 years ago | |||
| petter_mansson1 | " I was not aware of this. Very cool, I had an idea doing something of the same sort but it's better if we work together! I'd love to share what I'v..." | Read more » | about 5 years ago | |||
| warren | " Hi! This is awesome. Have you seen our Infragram Pi software, somewhat documented at: https://publiclab.org/infragram-pi https://publiclab.org/p..." | Read more » | about 5 years ago | |||
| Bronwen | " This is fantastic! Looking forward to seeing your conclusions! " | Read more » | about 5 years ago | |||
| bansal_sidharth2996 | " Hi, please submit your proposal on the GSOC official website at the earliest. Thanks " | Read more » | about 5 years ago | |||
| bansal_sidharth2996 | " I really like your proposal Few suggestions We are looking forwards for supportive folks. Make sure to do 1. at least one PR review each week and..." | Read more » | about 5 years ago |