| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Tbtouaki | "Hi I have tried several white balance options before, base on what I've read. On this pics the settings were exactly the same as the maxmax camera...." | Read more » | about 9 years ago | |||
| Tbtouaki | "Hi Sorry for the trouble but how did you proceed to calibrate individual bands to reflectance before calculating NDVI? Did you use "dark object sub..." | Read more » | about 9 years ago | |||
| cfastie | "Hi Rita, Your photo above (NIR1_Red3_b.jpg) will not produce very good NDVI. Most of the pixels of plants have the same value in each of the three ..." | Read more » | about 9 years ago | |||
| Tbtouaki | "Hi I currently have a modified canon (IR block removed) with a wratten 25A Red filter. My pictures are really nice looking but I have big problems ..." | Read more » | about 9 years ago | |||
| Jimo1966 | "Yes! Glue can be remove easily with Heat Gun and a Sewing Needle. Smash to bits is never an option. (or the last one) I filed down I tiny screwdriv..." | Read more » | about 9 years ago | |||
| fgiorlando | "Interesting stuff indeed, I have been lurking here for a while and trying to build a good documentary NDVI camera for a public gardening project. I..." | Read more » | about 9 years ago | |||
| pjsbill | "Hi Warren, In the frame level rate it is around 20-30 fps, better than the raspberry. I think that the resolution of the camera is at maximum, I d..." | Read more » | about 9 years ago | |||
| warren | "Were you able to do this at full camera resolution? What frame rate? Do you have some video youve saved that you can share? Thanks!! " | Read more » | about 9 years ago | |||
| nshapiro | "Here is some alternative tech to the FLIR-- hyperspectral camera for methane visualization (which is one of the most expensive gases to monitor). M..." | Read more » | over 9 years ago | |||
| bwarzak | "Ned, Our company is supposed to be writing an article for Vision System Design magazine regarding uses for dual band filters. I realize that the r..." | Read more » | over 9 years ago | |||
| warren | "Note: the python library is here: https://github.com/publiclab/infrapix Infragrammar would be great to adopt as a standard: http://publiclab.org/w..." | Read more » | over 9 years ago | |||
| cfastie | "Andresc4, The A2300 allows custom white balance. For a red or yellow filter, flood the sensor with red light (fill the frame with red paper in dire..." | Read more » | over 9 years ago | |||
| andresc4 | "cfastie Great, in that case the formula that I'm using is correct for the Weatten25A or for the Yellow filter ndiv= (ndiv.b-ndiv.r)/(ndiv.b+ndiv...." | Read more » | over 9 years ago | |||
| cfastie | "The response from Pix4D does not seem to be well informed. With a Wratten 25A filter, NIR and little else will be captured in the blue channel and ..." | Read more » | over 9 years ago | |||
| andresc4 | "Another thing that confuses me a little bit more is this response from the people of Pix4d Pix4D Support December 01, 2014 13:28 Dear Andres, We..." | Read more » | over 9 years ago | |||
| warren | "One way to do this could involve the python version of infragram -- perhaps modded to use Infragrammar? " | Read more » | over 9 years ago | |||
| Thorsten | "I had no problems with using lens filters so far. But it would be interesting if there is some reason to better replace the IR Filter instead. " | Read more » | over 9 years ago | |||
| nedhorning | "I don't have experience with lens mounted filters but you might get some feedback if you post your question on the plots-infrared list at http://pu..." | Read more » | over 9 years ago | |||
| zeigerpuppy | "I am thinking of getting a modified DSLR for NDVI imaging and am having trouble deciding between two different options - camera with Schott BG3 fil..." | Read more » | over 9 years ago | |||
| pswigert | "Hi! I really enjoyed this thread and seeing everyone's thoughts and responses to the question. @WhiteRabbit , I was wondering if you have any updat..." | Read more » | over 9 years ago | |||
| eustatic | "this is cool. thanks, chris " | Read more » | over 9 years ago | |||
| mathew | "thank you for these conversion details and trying to get to the bottom of this problem. " | Read more » | over 9 years ago | |||
| patcoyle | "Chris, excellent well documented tips. I appreciate your continuing effort to advance the quality of results from these tools. " | Read more » | over 9 years ago | |||
| cfastie | "He didn't listen when they told Thomas Edison "You've tried enough filaments." He didn't listen when they told George Washington Carver "We don't n..." | Read more » | over 9 years ago |