Comments

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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 » about 4 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 » about 4 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 » about 4 years ago
cfastie "I don't think there is any debate about what those words mean, but I find it hard to use them correctly all the time. The only sensors I have used ..." | Read more » about 4 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 4 years ago
cfastie "It's really good to see these flight trajectories. I think it's an important way to document a flight. I have not been able to figure out how to m..." | Read more » about 4 years ago
cfastie "I like the idea of linking to other notes that set the stage for the current one. I was using the response:##### powertag for a while, but that doe..." | Read more » about 4 years ago
cfastie "Thanks Jeff. That's a really interesting question. I did not include step by step instructions, so a complete novice would have to do some research..." | Read more » about 4 years ago
cfastie "Well-commented code is always helpful. At the novice level at which I work, good comments are sometimes hard to come by. I have often stolen uncomm..." | Read more » about 4 years ago
cfastie "That's a good question about the DVD plastic fluorescing. I don't know of anyone who has raised that question about the Public Lab spectrometers. I..." | Read more » about 4 years ago
cfastie "Katie, it sounds like what would be helpful for you is a better NDVI wiki. That would explain what it can mean when NDVI is high, and why it might ..." | Read more » about 4 years ago
cfastie "That's a really good point that the En pin on the Feather can disable the regulator and reduce power consumption. We need a table of all the featur..." | Read more » about 4 years ago
cfastie "Hi Patrick, With 60 people, 30 minutes is barely enough time to go outside and come back in, even without doing anything at either place. So you m..." | Read more » about 4 years ago
cfastie "The histograms were made with Fiji: http://imagej.net/Fiji/Downloads " | Read more » about 4 years ago
cfastie "Teams? There are going to be teams? Will they have T-shirts? I'm still not sure overlapping code is relevant. If you have a working sketch for a K..." | Read more » about 4 years ago
cfastie "Maybe more useful than a long list of popular/recent/related notes in the sidebar is the one or two real research notes (not newsletters, events, o..." | Read more » about 4 years ago
cfastie "The dashboard feed is a mix of research notes, comments, questions, and events. The display can be limited to a subset of these using a dropdown me..." | Read more » about 4 years ago
cfastie "You might want to point out that you are referring to the left sidebar which shows up on a subset of publiclab pages. I don't think I have ever f..." | Read more » about 4 years ago
cfastie "Cool. We'll have to get a third answer or Gretchen won't know what to think. " | Read more » about 4 years ago
cfastie "I'm not familiar with the KnowFlow, but I would not expect there to be much overlap in the sketches which are typically used to run the two devices..." | Read more » about 4 years ago
cfastie "Nine cubic meters for 500 euros is not a terrible deal. That's 318 cubic feet (which is a huge tank, so that's a problem unless you don't really ha..." | Read more » about 4 years ago
cfastie "Although there are sensors that require more than 3.3V, most of the simple DIY sensors are designed to use 3.3V. For example, all of the sensors he..." | Read more » about 4 years ago
cfastie "Further empirical evidence suggests that the VBAT pin delivers the voltage of the battery that is plugged into the "Lithium 3.7V" connector, but no..." | Read more » about 4 years ago
cfastie "Evidence suggests my answer is wrong. I powered a Riffle with a battery pack which supplied 4.5V, but the VBAT pin supplied only 2.3V. So maybe it'..." | Read more » about 4 years ago