| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| nedhorning | "Hi kaushalsingh – The three target reflectance values you note seem like a good choice to me. At this point I do not have study material in additi..." | Read more » | over 7 years ago | |||
| kaushalsingh | "@nedhorning You got it right Ned. I am trying to calibrate the image using a reference target before you calculate NDVI. Suppose, I have 3 target ..." | Read more » | over 7 years ago | |||
| nedhorning | "Hi kaushalsingh – Ait seems as if you are trying to calibrate the image using a reference target before you calculate NDVI? If that assumption is a..." | Read more » | over 7 years ago | |||
| kaushalsingh | "@nedhorning Hello Ned, I have calculated ndvi using following code in matlab, using single camera without white balancing: red_orig = imread('IM..." | Read more » | over 7 years ago | |||
| cfastie | "Scott, There is no problem. The Mobius can do interval shooting at any interval, and it can also do motion detection. The trail camera has NIR LED..." | Read more » | over 7 years ago | |||
| eustatic | "Is the problem that the mobius can t do intervals greater than a certain amount? or mostly it's the NIR and motion capture that you are looking fo..." | Read more » | over 7 years ago | |||
| warren | "Sorry, I meant make an activity out of this, with step by step instructions and such, not one taking the next step. So, yes! I'm hoping @stevie an..." | Read more » | over 7 years ago | |||
| cfastie | "Don't we have to have an activity before we have a follow up activity? There are lots of ways to make this an activity and many ways to follow up (..." | Read more » | over 7 years ago | |||
| warren | "This was fun and pretty easy. I'd love to try collaborating on a follow-up activity, I don't think it'd be too complicated. What do you think? " | Read more » | over 7 years ago | |||
| cfastie | "Oh no @Zengirl2, TY so much for posting the awesome hard-hitting journalistic expose of LEAFFEST at the Adafruit blog: https://blog.adafruit.com/20..." | Read more » | over 7 years ago | |||
| zengirl2 | "TY so much for posting the details of this test @cfastie and @warren! " | Read more » | over 7 years ago | |||
| cfastie | "ImageJ and Fiji have very powerful tools for extracting, summarizing, and displaying the NDVI values in the floating point images produced by Ned's..." | Read more » | almost 8 years ago | |||
| ahcalori | "@cfastie. I think you are right. The problem must be the filters. I will open the cam and see what happens. I'm just using the product the way I bo..." | Read more » | almost 8 years ago | |||
| cfastie | "The color gradient in the photos taken by your modified camera seems to be the cause of the artifacts in your NDVI image. To determine whether this..." | Read more » | almost 8 years ago | |||
| ahcalori | "Hi, dear @cfastie, the webcam that I have been used is described in the follow link: https://www.adafruit.com/product/1722. The filter used allow ..." | Read more » | almost 8 years ago | |||
| ahcalori | "@cfastie, Is not the Mobius camera. Is just one with modified filters. I will post the specification here. Thanks! " | Read more » | almost 8 years ago | |||
| cfastie | "Although the diagonal color gradient is not conspicuous in the NDVI image, it is present in the NIR photo (pinkish in the lower left and bluish in ..." | Read more » | almost 8 years ago | |||
| ahcalori | "@cfastie, Thanks for reply. The camera that has been used is one bought in the 'Public Lab Store'. The curious fact is that some pics does not has ..." | Read more » | almost 8 years ago | |||
| cfastie | "The color gradient in the NIR photo from lower left to upper right is conspicuous.This could be caused by the ambient lighting or by the camera. Wi..." | Read more » | almost 8 years ago | |||
| JacobNederend | "@nedhorning Today I rescued an old light source and integrating sphere from the scrap heap on campus. I don't think the light source is a monochrom..." | Read more » | about 8 years ago | |||
| shubham | "Thank you Warren. I downloaded the .csv file and will try to work on the stats. Will keep updated on the project. :) " | Read more » | about 8 years ago | |||
| warren | "This looks fantastic; yes, you could increase your camera resolution. You can download .csv from any Spectral Workbench spectrum -- it's on the le..." | Read more » | about 8 years ago | |||
| nedhorning | "Several years ago I was thinking of how to build a DIY integrating sphere/monochromator setup but never pursued it. You would want something other ..." | Read more » | over 8 years ago | |||
| JacobNederend | "http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-1-W4/207/2015/isprsarchives-XL-1-W4-207-2015.pdf This paper has a method for det..." | Read more » | over 8 years ago |