Public Lab Research note


Initial results: Using PTLens to correct fisheye effect in PL Mobius Infragram Point and Shoot

by patcoyle | November 27, 2014 02:04 | 3,119 views | 0 comments | #11407 | 3,119 views | 0 comments | #11407 27 Nov 02:04

Read more: stable.publiclab.org/n/11407


What I want to do

Correct fisheye effect in images from PL Mobius Infragram Point and Shoot. One tool is PTLens ($25).

My attempt and results

Based on conversation with Stewart Long and his experience with GoPros, I used my neighbor's garage door to provide an image with a grid feature. I then used the 10-free-image trial version of PTLens to apply fisheye correction and crop the images. Used Adobe PS to make a panorama from the infrablue images. Used Ned Horning's Fiji Photomonitoring plugin to process the infrablue panorama to NDVI. Screenshot of PTLens with settings used

PTLens_ss.jpg

Contact sheet of before and after images

contact_sht_ss.jpg

PS automerged panoramas: infrablue

PTLense_corrected_crpd_Mobius_infrablue_Panorama.jpg

Floating Point ndvi

FP_ndviImage.jpg

Color ndvi

Color_Index.jpg

Questions and next steps

Explore settings and use of the PTLens software. Explore other software solutions to address the fisheye effect. Consider replacement lens options for the Mobius.

Why I'm interested

The fisheye distorted images are difficult to stitch into maps.


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