| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| suman | "Dear FrankA, Greetings from Nepal, I have a mobius actioncam ( Green Blue and Near Infrared ) which is modified to take near infrared spectrum for..." | Read more » | almost 8 years ago | |||
| sujayj | "Thanks Chris " | Read more » | almost 8 years ago | |||
| cfastie | "You can use any filter that blocks most blue and green light (all visible light other than red) and also passes a lot of near infrared light (somew..." | Read more » | almost 8 years ago | |||
| cfastie | "Finding inexpensive, do-it-yourself calibration targets is an obstacle to NDVI calibration. You need targets for which the spectral reflectance is ..." | Read more » | almost 8 years ago | |||
| J_tanna | "@cfastie sample image is like this, " | Read more » | almost 8 years ago | |||
| J_tanna | "@cfastie On an agriculture land, How can we specify the targets for calibration? " | Read more » | almost 8 years ago | |||
| dbehr | "Thx. @cfastie " | Read more » | almost 8 years ago | |||
| cfastie | "Trying slightly different values could yield better results in some situations. CLF_SYSCFG.TXT " | Read more » | almost 8 years ago | |||
| dbehr | "Hi, I have Mobius Infragarm cam for NDVI. I can't locate the White Balance settings for the mSetup program. Can you pls. give the values or a link..." | Read more » | almost 8 years ago | |||
| cfastie | "Here is my discussion of calibrating NDVI images: https://publiclab.org/notes/cfastie/05-01-2016/calibration-cogitation And Ned's most recent note..." | Read more » | almost 8 years ago | |||
| J_tanna | "@cfastie Thank you for your time. I have two more doubts in my mind, 1.) What are the steps that I need to apply for image calibration? 2.) What is..." | Read more » | almost 8 years ago | |||
| cfastie | "With a blue filter which blocks only red light, the red channel will capture NIR. Use the red channel for NIR and the blue channel for visible ligh..." | Read more » | almost 8 years ago | |||
| cfastie | "With a blue filter which blocks only red light, the red channel will capture NIR. Use the red channel for NIR and the blue channel for visible ligh..." | Read more » | almost 8 years ago | |||
| J_tanna | "@cfastie What should be the formula of NDVI for NIR camera as it is blocking red light. " | Read more » | almost 8 years ago | |||
| platteferguson | "So my million dollar question do I buy 3 or 4 inspire 2.0 with extra batteries or go for the new Ebee SQ ag drone for 12-15k with the multi spec wi..." | Read more » | almost 8 years ago | |||
| rs806 | "Okay thanks Ned! I had been wondering about the structure of the csv file since, judging from the script, it had quite a few columns of information..." | Read more » | almost 8 years ago | |||
| nedhorning | "The CSV file for the R script is different form the table in the "Improved DIY NIR camera calibration" post. The CSV file has the reflectance value..." | Read more » | almost 8 years ago | |||
| rs806 | "@nedhorning Hello Ned thank you for posting the R script. I'm finding it helpful to understand the process by going through the script itself. I wa..." | Read more » | almost 8 years ago | |||
| dannysmith | "thanks @Claytonb, they seem like the way to go " | Read more » | almost 8 years ago | |||
| Claytonb | "@dannysmith -I have been using the Labsphere Permaflect coated targets http://labsphere.com/labsphere-products-solutions/materials-coatings-2/coati..." | Read more » | almost 8 years ago | |||
| dannysmith | "@Claytonb - I was just wondering if you could indicate what type of calibration targets you are using? I've been looking at targets produced by lab..." | Read more » | almost 8 years ago | |||
| cfastie | "In single-camera NIR systems with a filter that blocks all red or blue, the camera can be adjusted to emphasize the color channel capturing NIR. Th..." | Read more » | almost 8 years ago | |||
| FrankA | "https://youtu.be/Vff--FWRfTo addendum how to file : sorry about the Clip quality.... NEW clip to follow in due course. I realised the Caiibration..." | Read more » | almost 8 years ago | |||
| jfd | "Nice! Thank you Warren, ok I will check it out. Yes, I will develop on Github... I will have some time in next 2 weeks, once I get a prototype goin..." | Read more » | about 8 years ago |