Smartphone NIR Technical Notes

 INTRODUCTION

We have adapted the Google (Nexus 5X, Nexus 5, Galaxy Nexus) and Apple (iPhone 6s, 6, 5s) smartphones for multi-spectral imaging applications (visible-to-near-infrared capability).

Night Sight, introduced in Google Camera App pushes the boundaries of low-light photography with smartphone cameras. It allows exposures up to 1 minute on the Pixel 3a so you can take sharp and clear pictures of the stars in the night sky or of nighttime landscapes without any artificial light. Sample imagery here.

Promising applications include near infrared photography, vegetation analysis, assisted night vision, UV/IR authentication, biological detection, urban growth analysis, defeating camouflage, disaster assessment, etc.

Use EigenCAM app to extract and isolate multi-spectral contents. 

Top row - clustering of red, blue, index.

Mid row - green cluster, decorrelation, near infrared.

Bottom row - RGB, NDVI in colors.