Search
Now showing items 11-20 of 23
Information capacity as a figure of merit for spectral imagers: the trade-off between resolution and coregistration
(2013)
The performance of spectral imagers is customarily described by several characteristics including resolution, noise, and coregistration. These must be traded off against each other in a practical imager design. This paper ...
Pixel scaling in infrared focal plane arrays
(2013)
We discuss effects that arise in pixels of IR focal plane arrays (FPAs) when pixel size scales down to approach the wavelength of the incident radiation. To study these effects, we perform first-principles electromagnetic ...
Characterizing the dynamic range of a hyperspectral camera
(2021-04-12)
The dynamic range of a hyperspectral camera can have a strong impact on the quality and integrity of the collected spectra. For the image sensor chip alone, the dynamic range is the ratio between the saturation level and ...
Multimodal Multispectral Imaging System for Small UAVs
(2020-01-17)
Multispectral imaging is an attractive sensing modality for small unmanned aerial vehicles (UAVs) in numerous applications. The most compact spectral camera architecture is based on spectral filters in the focal plane. ...
Specifying radiometric performance of hyperspectral and conventional cameras: A minimal set of independent characteristics
(2020)
The radiometric performance of cameras is customarily characterized and specified in terms of component properties such as F-number and readout noise. This paper considers the camera as an integrated unit and derives ...
Full characterization of spatial coregistration errors and spatial resolution in spectral imagers
(2018)
For multi- and hyperspectral imagers, the integrity of the spectral information depends critically on the spatial coregistration between bands. There is at present no commonly accepted way to fully specify coregistration ...
Cost-Effective Flight Strategy for Aerial Thermography Inspection of Photovoltaic Power Plants
(2022-11-06)
Thermography from unmanned aerial vehicles (UAV) is widely used for module condition surveys and defect detection in solar (photovoltaic) power plants. This article presents an optimized defect inspection procedure in which ...
A Performance Characteristic for Net Light Collection in Hyperspectral and Conventional Cameras: A*
(2022-12-09)
The signal-to-noise ratio of modern cameras under normal operating conditions tends to be limited by “photon noise” originating from the random arrival of photons. For best signal-to-noise ratio, it is desirable to collect ...
Compact multimodal multispectral sensor system for tactical reconnaissance
(Society of Photo-Optical Instrumentation Engineers (SPIE), 2022-09-30)
Multispectral imaging is an attractive sensing modality for small unmanned aerial vehicles (UAVs) in numerous military and civilian applications such as reconnaissance, target detection, and precision agriculture. Cameras ...
Simplified measurement of point spread functions of hyperspectral cameras for assessment of spatial coregistration
(2019-05-14)
In multi- and hyperspectral imaging, spatial coregistration of the point spread functions (PSFs) of all bands within each pixel is critical for the integrity of measured spectra. There is a need to define a standardized ...