Multispectral imaging system with spatial resolution enhancement
First Claim
1. An imaging system having spatial resolution enhancement comprising:
- (a) a multispectral imager having four synchronized monochromatic camera for providing multispectral bands of images;
(b) said multispectral image comprising a narrow band interference filter in front of each of said four synchronized monochomatic cameras, each interference filter being different comprising a spectral band within the spectral ranges covering blue, green, red, and near infrared;
(c) a computer system connected to an output of each of said four sysnchronized cameras of said multispectral images for receiving said multispectral bands of spectral images and performing resolution enhancement;
(d) means within said computer system for resampling-up each of said multispectral bands of spectral images using neighbor average interpolation;
(e) means for storing said resampled-up multispectral bands of images for digital processing; and
(f) means for performing fine pitch shifting on said multispectral band-to-band pixel registration of said resampled-up images to obtain more accurate band-to-band, registration.
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Accused Products
Abstract
A spatial resolution enhancement and dynamic range extension for a Computerized Airborne Multicamera Imaging System (CAMIS). CAMIS is a multispectral imaging system for diverse manned and unmanned aerial vehicles to fly along flexible paths and altitudes for a wide variety of applications. CAMIS comprises four spectral bands of progressive scan CCD video cameras with 782×576 square pixels each, giving a total of 1.82 million effective pixels. These cameras are synchronized and aligned in parallel with sub-pixel-accurate spatial offsets over a common field of view. A software procedure interpolates the original four-band 782×576 captures into 1564×1152 ones using a bi-linear algorithm, and then performs geometric correction and band-to-band pixel registration. The result is a more precisely registered, spatial resolution enhanced multispectral image, sized 1540(H) ×1140(V)×4(Bytes). The CAMIS CCD cameras include a controllable electronic shutter, which permits the system to acquire a desirable range of signals by a computed exposure, and then bracket it with two additional up/down-stepped exposures into computer memory. The integrated data set of the multiple stepped exposures results in effectively extending the dynamic range of the measurement.
68 Citations
6 Claims
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1. An imaging system having spatial resolution enhancement comprising:
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(a) a multispectral imager having four synchronized monochromatic camera for providing multispectral bands of images;
(b) said multispectral image comprising a narrow band interference filter in front of each of said four synchronized monochomatic cameras, each interference filter being different comprising a spectral band within the spectral ranges covering blue, green, red, and near infrared;
(c) a computer system connected to an output of each of said four sysnchronized cameras of said multispectral images for receiving said multispectral bands of spectral images and performing resolution enhancement;
(d) means within said computer system for resampling-up each of said multispectral bands of spectral images using neighbor average interpolation;
(e) means for storing said resampled-up multispectral bands of images for digital processing; and
(f) means for performing fine pitch shifting on said multispectral band-to-band pixel registration of said resampled-up images to obtain more accurate band-to-band, registration. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification