| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| utobolearning | "This is totally new topic for me. I am learning lot of things so this is also the New. utobo " | Read more » | about 4 years ago | |||
| warren | "Hi, you can use this simpler sequence for that: https://sequencer.publiclab.org/examples/#steps=ndvi,colormap This will just apply NDVI and the c..." | Read more » | almost 5 years ago | |||
| ThomasTaufan | "how to process single multispectral image with the modified webcam and red filter? Because when I saw your example, it is processing 2 images that ..." | Read more » | almost 5 years ago | |||
| cheneyshreve | ":smiley: " | Read more » | over 6 years ago | |||
| warren | "Just a note to self - as we plan out auto-registration features for this, could be good to look at #image-registration ! " | Read more » | over 6 years ago | |||
| warren | "Cool! We've tested blue filters with Raspberry Pi cameras, and it works well although the separate camera technique does result in cleaner separati..." | Read more » | over 6 years ago | |||
| xose | "During the leptos development we bought this board. We'are now playing with a point and shoot NDVI with raspi. I'll give the "IVMECH" board a chanc..." | Read more » | over 6 years ago | |||
| tech4gt | "This is so cool @warren " | Read more » | over 6 years ago | |||
| warren | "@imvec @xose too! " | Read more » | over 6 years ago | |||
| warren | "@tech4gt @ccpandhare check it out! :-) " | Read more » | over 6 years ago | |||
| warren | "Also could be interesting to @maggpi -- check it out! " | Read more » | over 6 years ago | |||
| sjmanosalvas | "@carolccarvalho please your help, I trying to do a similar project for school, but I'm new with MATLAB program, Could you send your codes to implem..." | Read more » | over 6 years ago | |||
| 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 | |||
| 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 |