Public Lab Research note


to know process of NDVI calculation through point and shoot infrared camera

by rajsan1108 | | 1,811 views | 1 comments |

Read more: publiclab.org/n/12223


sir I am researcher in Punjab agricultural university Ludhiana, Punjab (India ). I have bought your camera for NDVI calculation of the corn field for my project work. 1) I used infragram for image analysis but after uploading image of IR camera and select NDVI for point and shoot camera option on red filter then I select HSV mode.then I obtain red and yellowish image but after that how will I know the NDVI value. please guide me and tell me full process so that I am able to find NDVI. 2) secondly I want to know the about that how I can take image automatically after ever 2 second interval of time without pressing the shutter key since we are installing IR camera on drone take images at high altitude and take images. 3) third thing I want to know about camera viewing angle on both the axis, so that I can fly my drone according to the field of view. I have 1.4 acres of field & 36 plots of size 16*10 metres & I want to calculate NDVI of each plot... please send me all details as early as possible so i can able to find NDVI of the field and complete my project work.... waiting for your reply...


1 Comments

To set the Mobius camera to take a photo every few seconds, install msetup from here: https://www.mobius-actioncam.com/downloads-info/. Under Photo Mode there are options for time-lapse.

I don't think infragram.org displays the color table and NDVI values. The NDVI image below was made with the Photo monitoring plugin for Fiji (http://publiclab.org/notes/nedhorning/07-22-2015/introducing-the-calibration-plugin-for-imagej-fiji)

ndviKey.JPG

With the Fiji plugin you can make a floating point image that has the actual NDVI values in each pixel. Below is such an image with a graph of the NDVI values in a transect through the field (yellow marquee). Individual rows of crops can be distinguished in the profile.

NDVIprofile.JPG

Chris


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