Comments

Author Comment Last activity Moderation
cfastie "Hi Juanjo, It would be good to see some photos from your archaeological missions, including more of the cool kite and how you attach the camera. A..." | Read more » over 2 years ago
cfastie "The Melexis MLX90614 Non-Contact Sensor has a temperature range of -70°C to +380°C. This is an infrared sensor so it does not have to touch the thi..." | Read more » over 2 years ago
cfastie "Whatever program you use to geotag your photos, make sure your photos were taken with a camera which had the correct time and timezone set. Most pr..." | Read more » over 2 years ago
cfastie "ExifTool by Phil Harvey is the industry standard command line tool to extract or modify the information in the EXIF header of image files: ExifToo..." | Read more » over 2 years ago
cfastie "The original photo above has some potential for conversion to NDVI, but the red channel (NIR) is not very much brighter than the blue channel (blue..." | Read more » over 2 years ago
cfastie "Leslie, it's really good you got this working. Thanks for troubleshooting the RTC library. It looks like the library I have been using is the MrAlv..." | Read more » over 2 years ago
cfastie "Sorry I was wrong about your original photo being grayscale. You are correct that it is color photo. All three color channels are extremely similar..." | Read more » over 2 years ago
cfastie "There was a spam comment on this note which I deleted today. This is note number 7? " | Read more » over 2 years ago
cfastie "Your image "660_850_Orginal.jpg" is a grayscale photo. The photo taken with your camera should be a three color photo with different values in the ..." | Read more » over 2 years ago
cfastie "Isn't that what research notes are for? Aren't research notes how we keep up with each others' activities? If research notes fail to accomplish thi..." | Read more » over 2 years ago
cfastie "It would be fun to try an Aeropod. I couldn't find any details about the instruments, but it looks like an awesome contraption to fly. " | Read more » over 2 years ago
cfastie "A pitot tube measures air pressure and uses fancy math to relate that to wind speed. I assume the ones on airplanes work better than the Rev P. " | Read more » over 2 years ago
cfastie "I decided not to drop into the rabbit hole of applying time series analysis to these data. There does appear to be some periodicity present, but I ..." | Read more » over 2 years ago
cfastie "It will be important to modify your two camera system so the photo pairs capture the same scene. It will also be important to align the two photos ..." | Read more » over 2 years ago
cfastie "I have a hypothesis about the different results obtained with two BME280 sensors on the flying rig. A difference of 3° to 4°C is more than should b..." | Read more » over 2 years ago
cfastie "Yes, the newer Rev. P sensor works better in high wind because it has a strong heater so the wind can't cool it off too fast. But the older Rev C s..." | Read more » over 2 years ago
cfastie "With this filter in front of your camera lens, the photos captured will include mostly near infrared light. There will be some visible light includ..." | Read more » over 2 years ago
cfastie "A running mean of the aerial wind speed looks like a very reasonable result. The red line is a running mean of 10 observations (which were six seco..." | Read more » over 2 years ago
cfastie "When the rich text editor went live (a year or two ago?) I gave it a try. In the middle of writing my first Rich research note I couldn't figure so..." | Read more » over 2 years ago
cfastie "I think the answers to your latest questions depend a lot on the sfm software you will be using. Some online services don't use GPS data, so it won..." | Read more » over 2 years ago
cfastie "I think what you are proposing is quite realistic. Depending on the scale of your study areas (e.g., How tall are the cliffs?), this could be accom..." | Read more » over 2 years ago
cfastie "This looks like a great project. The photos used for structure from motion models should have a few characteristics: They should be high image qu..." | Read more » over 2 years ago
cfastie "Here is a strange development. This action camera has a 1MP sensor. It is a 1/4" sensor which has an area of 10 square mm. The native image size is..." | Read more » over 2 years ago
cfastie "Gretchen, It looks like some of the sensors in the Water Sensor wiki could be hacked to work with an Arduino based data logger, but you would want..." | Read more » over 2 years ago