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infrablue
infrablue


Author Comment Last activity Moderation
cfastie "`>>So according to this we should be getting about 10% transmission of red light, does that mean I should subtract 10% of each pixel value in..." | Read more » about 3 years ago
nstarli "Thanks for the detailed response Chris, this is super helpful! I really appreciate the feedback. So I have actually been provided the full charact..." | Read more » about 3 years ago
cfastie "I don't know for sure whether your protocol with the RPi camera (use automatic white balance with blue paper) and my protocol with a Powershot (use..." | Read more » about 3 years ago
nstarli "Thanks for the reply Chris. I have read through pretty much every single one of your posts! So my white balance calibration is the simple one that ..." | Read more » about 3 years ago
cfastie "I am not familiar with your white balance procedure so I don't know how it is affecting your results. If you can manually set the white balance, se..." | Read more » about 3 years ago
nstarli "Sorry, I meant to include the cfastie colormap image as well: " | Read more » about 3 years ago
nstarli "Where can I find the blue calibration card? I could not find it on the public lab store. " | Read more » about 3 years ago
shivparkash05 "awesome & click here more " | Read more » over 3 years ago
anothal3v3l23 "Is the destroying angel bluest because of toxicity? " | Read more » almost 4 years ago
cagiva "@cfastie, You were absolutely correct. The Blue card from PublicLab arrived today so I redid the white-balancing calibration with it and I got much..." | Read more » almost 4 years ago
cfastie "Performing a custom white balance on a blue-filtered NIR camera fools the camera into exaggerating the brightness of the red channel. The red chann..." | Read more » almost 4 years ago
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
cfastie "Oh, you're right. The older lut used in the images above can be found here: https://publiclab.org/wiki/photo-monitoring-plugin " | Read more » almost 5 years ago
plnedestroyer "the file in that one shows a different Lut than the one you are using in these images " | Read more » almost 5 years ago
cfastie "The lut file for use in Fiji is available for download here: https://publiclab.org/notes/cfastie/08-26-2014/new-ndvi-colormap In a comment to that..." | Read more » almost 5 years ago
plnedestroyer "Okay I have everything ready to go but I have to ask you for the LUT file that you are using for your image then I'm set! " | Read more » almost 5 years ago
plnedestroyer "okay, yeah I understand it way better now, I just need to figure out how to get the LUT on it, that was my main confusion, well and still is a bit,..." | Read more » almost 5 years ago
cfastie "What Fiji does is a bit confusing. In a normal histogram the x-axis is brightness so 0 (at the left end) is black and 255 (at the right end) is max..." | Read more » almost 5 years ago
plnedestroyer "Ah okay got you, I was ultra confused,but how would that work, since its only putting the values on the histogram as just the brightness of the pix..." | Read more » almost 5 years ago
cfastie "Fiji made that histogram of the color NDVI image. The NDVI image is not an RGB color image (it is a single channel image with a color look up table..." | Read more » almost 5 years ago
plnedestroyer "where can I find how to do so, I looked through the tutorials and did not find anything on making custom histograms, I am able to make a b&w hi..." | Read more » almost 5 years ago
cfastie "I used Fiji (ImageJ) to make the histograms of the NDVI images. Fiji will make a couple of different kinds. " | Read more » about 5 years ago
plnedestroyer "@cfastie did you use a plugin to get the color histogram for the ndvi, because I am creating ndvi images from infrared but I need a histogram from ..." | Read more » about 5 years ago
plnedestroyer "alright thanks guys, I will try it " | Read more » about 5 years ago