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# nbg nbg

Author Comment Last activity Moderation
CD3000 "Very beautiful observation! My hypothesis is that chloroplast density is less in new vegetation, but also reflectance/absorbance/transmittance is ..." | Read more » about 4 years ago
warren "Maybe we should call our version of NDVI "INDVI" for Infragram-NDVI or something? Or BNDVI for Blue-NDVI? I'm loathe to make an already obscure acr..." | Read more » over 9 years ago
cfastie "kykytos, you are correct. The equation (NIR-R)/(NIR+R) is the standard one for NDVI. Substituting blue for red as in (NIR-B)/(NIR+B) also works wel..." | Read more » over 9 years ago
kykytos "A pair of doubts: In the equation in the image, it should say (IR-B)/(IR+B) (like in the video) instead of (IR-R)/(IR+R), Shouldn't it? Is the (IR-..." | Read more » over 9 years ago
warren "Haha, lots of fun stuff is possible. Try JavaScript math functions: R:Math.pow(R,2) G:Math.pow(G,2) B:Math.pow(B,2) I'm making a docs page here: h..." | Read more » over 9 years ago
cfastie "Huge Breakthrough! We love sliders! Here is NBG of an astroturf putting green (R*S, B*1.3, G*0.1, WHEN S=100): And here is ENDVI = ((R+G)-..." | Read more » over 9 years ago
donblair "(... and in case the resultant HTML is at all useful, it's here: https://github.com/Pioneer-Valley-Open-Science/infragram-js ) " | Read more » over 9 years ago
donblair "I've got your code working locally, and it's gorgeous. Just to play around, I tried adding in some of your video instructions as explanation on th..." | Read more » over 9 years ago
donblair "HOLY COW. " | Read more » over 9 years ago
cfastie "In fact it was just one dirt road, State Route 8, the Denali Highway. 135 miles of dust. " | Read more » over 9 years ago
warren ":-) you would've gotten there a lot faster if you hadn't pulled over so often! You drive a lot of dirt roads!! " | Read more » over 9 years ago
mathew "Here is a much better image capture program: https://dl.dropboxusercontent.com/u/31205904/camera%20bench.app.zip " | Read more » over 9 years ago