About

Location

Salisbury, VT


About Me:

The ecology and history of forests and landscapes, and new ways to see these things. High-resolution stitched images of vegetation, including low elevation aerial photography and multispectral imaging. Design and distribution of 3D printed aerial photography rigs via the KAPtery. Enlightening communities about where they live by revealing new perspectives on their environment. http://fastie.net/


Please tell us a bit about your UAV interest

I am pursuing aerial photography for landscape study and ecological analysis, including near infrared imaging for vegetation monitoring.


Hometown:

Vermont


Activity Feed

Chris Fastie replied to zk876's discussion Experimenting with NDVI , fiji + photoscan in Agricultural UAVs
"Photoscan may or may not be resampling the images (changing the resolution). To make that nice seamless mosaic, they also have to alter the color or brightness of images to make them match each other. The dynamic range of the final mosaic might be…"
Feb 12, 2015
Chris Fastie commented on Mark Williams's blog post NDVI flight results
"That NDVI_VGYRM look up table assigns magenta for only the values of 250 to 255. That is intended as a troubleshooting feature. If NDVI values are that high (equivalent to NDVI > 0.95), it is obviously due to an artifact. In dark shadows, both the…"
Dec 6, 2014
Chris Fastie commented on Mark Williams's blog post NDVI flight results
"Did you sandwich the glass and the polyester filter together? If so it appears that no new problems were created.
I am hypothesizing that the glass itself is not responsible for the better focus. Good focus can be achieved with just a polyester…"
Dec 6, 2014
Chris Fastie commented on Mark Williams's blog post NDVI flight results
"Mark,
The only S95 I converted works pretty well. I put a Wratten 87 polyester filter inside and the focus is sharper on the right side of the photos (below). So I assume I can improve focus by adjusting one or more of the sensor screws. I will be…"
Dec 2, 2014
Chris Fastie commented on Mark Williams's blog post NDVI flight results
"Mark,
It looks like the S95 images that make up your stitched mosaic vary in focus. Was the camera on autofocus? Poor focus is a common result after converting a camera, but the new filter may not be to blame. The S95 makes it easy to adjust the…"
Dec 2, 2014