| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| JohnsonC | "@cfastie Hi I just have one more quick question while designing my next experiment. If I substitute the IR LEDs with red LEDs in my chamber when I ..." | Read more » | over 8 years ago | |||
| JohnsonC | "@cfastie I will reflect on what you have said for my next experiments, thanks for your help! " | Read more » | over 8 years ago | |||
| cfastie | "Oh, that's great to be able to disable AWB. I don't really know what manual setting would be best for your use. If you are going to be swapping f..." | Read more » | over 8 years ago | |||
| JohnsonC | "@cfastie - That is really interesting to hear and thanks for the link to Ned's note there. I actually have an installed GHI camera that currently a..." | Read more » | over 8 years ago | |||
| aldehyde | "@JohnsonC - i will thankful if you can share this program with the community. " | Read more » | over 8 years ago | |||
| cfastie | "Hi JohnsonC, That is a very intriguing chamber you have. Being able to control the spectral quality of the lighting makes some interesting things ..." | Read more » | over 8 years ago | |||
| JohnsonC | "@aldehyde - It's just a python-made program that basically looks at a pixel of an image based on location (X pixel width, Y pixel height). As far a..." | Read more » | over 8 years ago | |||
| aldehyde | "Hi, tell me please what kind of tool you use for analyze each pixel of a NDVI image? Thanks! " | Read more » | over 8 years ago | |||
| bortek | "Thanks Clayton. I am on it now. :) " | Read more » | over 8 years ago | |||
| Claytonb | "@bortek -the blue in the NDVI image is related to the value of the color LUT I applied to the image during processing. I did that to help me to see..." | Read more » | over 8 years ago | |||
| bortek | "@Claytonb - I am planning to start with a single camera and do some initial testing and learning before I go over to two cameras. Yes the focusing..." | Read more » | over 8 years ago | |||
| Claytonb | "Here is a similar scene with the Event38 at about the same height. This is with f/4, exp 1/1250, ISO 100 " | Read more » | over 8 years ago | |||
| Claytonb | "@bortek -I am assuming that the noise is partly due to the filter thickness and light requirement. I believe the Event38 filter is 0.5mm thick and ..." | Read more » | over 8 years ago | |||
| bortek | "This is really interesting. I have read Ned's article too and it is clearly better contrast when using red filter versus blue. I have just receive..." | Read more » | over 8 years ago | |||
| cfastie | "That's a good description of what the Rosco blue filter does. Both the blue and the red channels will have a mixture of visible and NIR light. The ..." | Read more » | over 8 years ago | |||
| Rayishido | "Hi! I was in the filed without internet. I wrote a program that trigger the photo on the second pi when a picture is taken with the first so it is..." | Read more » | over 8 years ago | |||
| cfastie | "other areas (not foliage) showed values between 0.2 and 0.9 and I don't know why, since there is no photosynthesis occuring there. Getting high ND..." | Read more » | over 8 years ago | |||
| nachokhan | "Hey, interesting. I am also from Argentina and I am working in the same field. Can you write me? ignacio.rigoni at gmail. Abrazo! " | Read more » | over 8 years ago | |||
| cfastie | "Do you know how well synchronized the photo pairs are? Do you have to start them both taking photos at the same time, or synchronize their clocks? ..." | Read more » | over 8 years ago | |||
| Rayishido | "I am using 2 raspberry Pis (one camera on each) and I synchronize the shutters using interrupts. I had some strange behavior (one Pi taking more pi..." | Read more » | over 8 years ago | |||
| cfastie | "The NDVI image in my last comment was made by stretching only the NIR channel. The default is to stretch both NIR and VIS and that usually works we..." | Read more » | over 8 years ago | |||
| Rayishido | "Hi Chris, to obtain this picture you stretched the histogram of the visible or visible and IR. As far as I understand to make NDVI picture a visib..." | Read more » | over 8 years ago | |||
| cfastie | "Both NDVI images look good. Both seem to have some biological meaning and both have reasonable NDVI values in areas that are shady which is very go..." | Read more » | over 8 years ago | |||
| Rayishido | "Hi Chris! You assumed right! :D The pictures was taken with the pi noir and the blue filter and turned off the automatic white balance to set my o..." | Read more » | over 8 years ago |