images captured with wide-angle lenses suffer from spatial distortion, which prevents accurate measure and feature extraction. In this work, a mathematical model based on polynomial mapping is used to map the images f...
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images captured with wide-angle lenses suffer from spatial distortion, which prevents accurate measure and feature extraction. In this work, a mathematical model based on polynomial mapping is used to map the images from distorted image space onto the corrected image space. The model parameters include the polynomial coefficients, distortion center, and dot center. A new technique to estimate the distortion center based on the evaluation function is presented. In dot center estimation, a seed fill algorithm is used to traverse all pixels. The expansion polynomial was obtained by using cubic spline interpolation. With a field programmable gate array (FPGA), the real-time distortion correction is implemented, which is independent of a computer. The major benefit using FPGA is that the same circuit can be used for other circularly symmetric wide-angle lenses without being modified. (C) 2003 Society of Photo-Optical Instrumentation Engineers.
作者：
Lookin, N. A.Urals Fed Univ
Inst Radioelect & Informat Technol 32 Mira Str Ekaterinburg 620002 Russia RAS
Inst Engn Sci Ural Branch Ekaterinburg 620049 Russia
Continuous complication of data processing algorithms for space and air vehicles results to special-purpose processor embedded on the different levels of board hardware. Their architectures and instructions sets are a...
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ISBN:
(纸本)9789663354125
Continuous complication of data processing algorithms for space and air vehicles results to special-purpose processor embedded on the different levels of board hardware. Their architectures and instructions sets are adopted for effective implementation of the most complicated computational algorithms. It is important for real-timedigital signal and imageprocessing when computer performance must perform about 10(12) op/sec. These processors are intended for real-time data flow computation with large massive of signals or pixels and considered as a VLSI. Some problems of development of the functional-oriented processors with homogeneous architecture are discussed in the paper.
Innovations in optics, focal plane arrays (FPA), microelectronics and imageprocessing have revolutionized infrared camera design. Infrared detectors coupled with nanostructures are expected to subvert the traditional...
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ISBN:
(纸本)9781510639485
Innovations in optics, focal plane arrays (FPA), microelectronics and imageprocessing have revolutionized infrared camera design. Infrared detectors coupled with nanostructures are expected to subvert the traditional intensity detectors and advance to the multi-dimensional and data cube detectors. Photon trapping technology is expected to decrease the intrinsic dark current, broaden the response band, increase the QE and increase the working temperature. High density FPAs result to novel wide field-of-view small SWaP broadband infrared camera architecture. digital-pixel focal plane for real-time digital image processing enable the intelligent chips. This paper highlights sensors with nanostructure coupled FPA, photo trapping FPAs, high density FPAs and digital-pixel FPAs.
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