Radiometric calibration of eight-channel parallel multi-spectral imaging

Q4 Physics and Astronomy

光学技术 Pub Date : 2014-01-01 DOI:10.3788/GXJS20144003.0240

屈亮 Qu Liang, 廖宁放 Liao Ningfang, 董志刚 Dong Zhigang, 杨奇开 Yang Qikai, 吕航 Lü Hang, 董淑雯 Dong Shuwen

引用次数: 0

Abstract

In order to calibrate the eight-channel parallel multi-spectral imaging,the principle of the multi-spectral imaging is introduced.The radiation response of the camera is analyzed.Based on the eight channels and the characteristics of the narrowband filters,a method which takes the G channel output of each digital camera as calibration channel is proposed.Depending on the spectral radiance of the integrating sphere under different color temperatures and exposure time of the camera,the camera's radiation characteristic curve is fit.The results show that the method is accurate and valid. An accurate absolute spectral radiance output of the object is got.The eight channel multi-spectral imaging system′s data processing requirements is met.

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八通道平行多光谱成像的辐射定标

为了对八通道平行多光谱成像进行标定，介绍了多光谱成像的原理。分析了摄像机的辐射响应。根据8通道和窄带滤波器的特点，提出了一种以各数码相机的G通道输出作为标定通道的方法。根据积分球在不同色温和相机曝光时间下的光谱亮度，拟合出相机的辐射特性曲线。结果表明，该方法准确、有效。得到了精确的目标绝对光谱辐射输出。满足了八通道多光谱成像系统的数据处理要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

光学技术 Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

0.60

自引率

0.00%

发文量

6699

期刊介绍： The predecessor of Optical Technology was Optical Technology, which was founded in 1975. At that time, the Fifth Ministry of Machine Building entrusted the School of Optoelectronics of Beijing Institute of Technology to publish the journal, and it was officially approved by the State Administration of Press, Publication, Radio, Film and Television for external distribution. From 1975 to 1979, the magazine was named Optical Technology, a quarterly with 4 issues per year; from 1980 to the present, the magazine is named Optical Technology, a bimonthly with 6 issues per year, published on the 20th of odd months. The publication policy is: to serve the national economic construction, implement the development of the national economy, serve production and scientific research, and implement the publication policy of "letting a hundred flowers bloom and a hundred schools of thought contend".