System and method for calibrating imaging measurements taken from aerial vehicles

摘要

Systems and methods are provided for calibrating spectral measurements taken of one or more targets from an aerial vehicle. Multiple photo sensors may be configured to obtain spectral measurements of one or more ambient light sources. The obtained spectral measurements of the one or more ambient light sources may be used to calibrate the obtained spectral measurements of the target.

主权项

1. A system for obtaining calibrated spectrally-resolved images of a target, the system comprising:
an aerial vehicle; at least two spectral imaging devices disposed at the aerial vehicle including a first spectral imaging device and a second spectral imaging device, the first spectral imaging device being configured to obtain spectrally-resolved images of a target over a first discrete spectral frequency range centered on a first spectral frequency, the second spectral imaging device being configured to obtain spectrally-resolved images of the target over a second discrete spectral frequency range centered on a second spectral frequency, the first spectral frequency being different from the second spectral frequency, the target being at least partially illuminated by one or more ambient light sources; and at least two photo sensors disposed at the aerial vehicle including a first photo sensor and a second photo sensor, the first photo sensor being configured to obtain measurements of the one or more ambient light sources over the first discrete spectral frequency range centered on the first spectral frequency, the second photo sensor being configured to obtain measurements of the one or more ambient light sources over the second discrete spectral frequency range centered on the second spectral frequency; wherein the spectrally-resolved images obtained by the first spectral imaging device are calibrated based on the measurements of the one or more ambient light sources obtained by the first photo sensor; wherein the spectrally-resolved images obtained by the second spectral imaging device are calibrated based on the measurements of the one or more ambient light sources obtained by the second photo sensor; and wherein the first photo sensor includes a first light emitting diode (LED) used as a sensor and the second photo sensor includes a second LED used as a sensor.