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cfastie commented on Engineered Histograms : "I used Fiji (ImageJ) to make the histograms of the NDVI images. Fiji will make a couple of different kinds. " | Read more » 9 days ago
quencher commented on How do we confirm the current version of the software? : "Hi Warren, we're testing the flow of multiple fluids using dye solutions. We're total amateurs. Any ideas or references you could point us at? Char..." | Read more » 9 days ago
stoft commented on PLab Spectrometer Gain-Correction : "Ah, good. Glad you could view the additional data and figured it out. " | Read more » 9 days ago
warren commented on Collaboratively write the new Pocket Guide to Grassroots Mapping : "And cover design coming together here! https://docs.google.com/presentation/d/1ochr6gQm6JO-Eg0Nztu7Uu6tTci1vLDVc_6_eZ-yhDw/edit?usp=sharing " | Read more » 10 days ago
Tehnicni commented on PLab Spectrometer Gain-Correction : "How a stupid mistake. I checked linearity of all 3 cameras at three points, thinking that it have an exponential dependency, which is not true, the..." | Read more » 10 days ago
warren commented on Does anyone know what image processing spectral workbench does to find intensity at wavelength/ where to find the coding for that? : "at what point in the code? in spectrum? How are you going to use it? I'm happy to help! " | Read more » 10 days ago
warren commented on Does anyone know what image processing spectral workbench does to find intensity at wavelength/ where to find the coding for that? : "yep - it averages the three channels! " | Read more » 10 days ago
warren commented on Setting up the Raspberry Pi Camera for Wireless Streaming : "Love this so much! I was thinking you might have a note above or just below "How It Works" that could advise you to jump ahead to the "Skip a few ..." | Read more » 10 days ago
warren commented on Autonomous Recording Unit : "Wow, this is a great page! If you're still working on it, we'd love to see some updates -- we're starting to collect lots of material over at http:..." | Read more » 10 days ago
warren commented on What information do I need to assess if a data logger and sensor will be compatible? : "And also see: https://publiclab.org/questions/gretchengehrke/07-19-2017/can-commercially-available-water-sensors-work-with-diy-data-loggers " | Read more » 10 days ago
warren commented on What information do I need to assess if a data logger and sensor will be compatible? : "@cfastie - i remember you highlighted a few different interfaces Arduinos can use -- i2c, analog... do many sensors fall into one of these categori..." | Read more » 10 days ago
warren commented on Hydrogen Sulfide Testing With Black and White Film : "Also note this PDF version! https://i.publiclab.org/system/images/photos/000/004/830/original/H2SphotopaperHowTo_ew__(1).pdf " | Read more » 10 days ago
warren commented on Quick Build: Raspberry Pi Microscope : "This is great! Love the photos. Was thinking if there was a cheap product we could substitute for the LED and battery pack, to save a few steps, bu..." | Read more » 10 days ago
warren commented on How do we confirm the current version of the software? : "Cool! what are you interested in doing with it? I'm the lead developer, very happy to work with you! " | Read more » 10 days ago
quencher commented on How do we confirm the current version of the software? : "Thank you, that's exactly what I need! " | Read more » 10 days ago
stoft commented on PLab Spectrometer Gain-Correction : "Yes, clearly all but the last image shows compression in the Green (and Red though less). Because the process of spectral data from a webcam does n..." | Read more » 10 days ago
amirberAgain commented on Hackteria Remix: Building a Raspberry Pi Microscope : "This looks really nice! I'll start assembling the parts! in the mean time, a small suggestion: place a diffuser (piece of parchment paper) between ..." | Read more » 10 days ago
plnedestroyer commented on Engineered Histograms : "@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 » 10 days ago
warren commented on Simple data logger : "Super - added this here: https://publiclab.org/q/15296 " | Read more » 10 days ago
warren commented on Simple data logger : "I also like the prospect of an Atmega 328 with no SD card for logging. How much of the 32k memory would be available after flashing the program? M..." | Read more » 10 days ago
warren commented on Dd : "Hi! What kind of experiment are you doing? " | Read more » 10 days ago
warren commented on Water Filter Effectiveness : "There are also a number of resources on turbidity monitoring -- DIY and otherwise, here: https://publiclab.org/wiki/turbidity " | Read more » 10 days ago
stevie commented on Quick Build: Raspberry Pi Microscope : "@stevie awards a barnstar to partsandcrafts for their awesome contribution! " | Read more » 10 days ago
stevie commented on Putting sensor data to work : "@stevie awards a barnstar to cfastie for their awesome contribution! " | Read more » 10 days ago
stevie commented on Setting up the Raspberry Pi Camera for Wireless Streaming : "@stevie awards a barnstar to partsandcrafts for their awesome contribution! " | Read more » 10 days ago
liz commented on Risks to public comment : "This is a great description of strategy @kgradow1 ! Would you consider adding it in to the second paragraph on the wiki, under https://publiclab.or..." | Read more » 10 days ago
Tehnicni commented on PLab Spectrometer Gain-Correction : "I also tried the third webcam, cheap Chinese. White Balance: R and G at max, B in the middle. Gama 2, Exposuer manually Measured at different..." | Read more » 10 days ago
nshapiro commented on Oil Chemistry of Keystone Leak : "Interesting question! if you'd like to elaborate a bit more on your thoughts or talk about how the photo spectroscopy kit could be of help, please..." | Read more » 10 days ago
stoft commented on PLab Spectrometer Gain-Correction : "The camera's I've used seem different in this effect but you might try to hunt down the technical data sheets from the Mfg -- sometimes they have a..." | Read more » 10 days ago
Tehnicni commented on PLab Spectrometer Gain-Correction : "I'm using wery old cheap webcam with all controll on manual and get same result with Logitech C525 also in manual mode. I checked lineariti on all ..." | Read more » 10 days ago