| 彩色数码相机光强响应特性的标定实验 |
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| 引用本文： | 吴波,符泰然,程晓舫,袁耀明,郑小兵,章骏平. 彩色数码相机光强响应特性的标定实验[J]. 光电工程, 2006, 33(6): 101-105 |
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| 作者姓名： | 吴波 符泰然 程晓舫 袁耀明 郑小兵 章骏平 |
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| 作者单位： | 中国科学技术大学,热科学和能源工程系,安徽,合肥,230026;中国科学技术大学,热科学和能源工程系,安徽,合肥,230026;中国安全生产科学研究院,北京,100029;中国科学院安徽光学精密机械研究所,遥感部,安徽,合肥,230031 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 当前高动态彩色数码相机的光强响应具有强烈的非线性,针对于此,用多项式这种非线性模型对彩色数码相机红、绿、蓝三通道的光强响应特性予以描述。建立了一种利用曝光时间测量CCD彩色数码相机光强响应特性的方法,通过调整快门速度获得不同的光强。同时,设计了标定实验,选用OLYMPUSE20数码相机对上述理论分析成果进行了实验验证,分别采用多项式模型和幂模型对实验数据进行拟合。实验结果表明,光强响应标定方法是可行的,多项式模型更适于描述彩色数码相机光强响应特性。
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| 关 键 词： | CCD 光强响应 数码相机 标定 |
| 文章编号： | 1003-501X(2006)06-0101-05 |
| 收稿时间： | 2005-05-19 |
| 修稿时间： | 2005-09-13 |
Calibration experiment for intensity response characteristics of digital color camera |
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| WU Bo,FU Tai-ran,CHENG Xiao-fang,YUAN Yao-ming,ZHENG Xiao-bing,ZHANG Jun-ping. Calibration experiment for intensity response characteristics of digital color camera[J]. Opto-Electronic Engineering, 2006, 33(6): 101-105 |
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| Authors: | WU Bo FU Tai-ran CHENG Xiao-fang YUAN Yao-ming ZHENG Xiao-bing ZHANG Jun-ping |
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| Affiliation: | 1. Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230026, China; 2. China Academy of Safety Science and Technology, Beijing 100029, China; 3. Anhui Institute of Optics and Fine Mechanics, the Chinese Academy of Sciences, Hefei 230031, China |
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| Abstract: | For digital color camera with high dynamic range, the intensity response characteristic is strongly nonlinear. Therefore, this paper established the non-linear model (polynomial) to respectively predict the intensity response characteristics for three channels (R, G, B) of digital color camera. Then a convenient method was put forward to determine the intensity response curves of digital color camera by only adjusting the exposure duration. For the specified digital color camera, Olympus-E20, we set up the calibration experiments of intensity response characteristics and presented the corresponding experimental results through polynomial model fitting and exponent model fitting. The results show that the calibration method mentioned in this paper is feasible. And the polynomial model is more suitable to describe the response characteristics of digital color camera. |
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| Keywords: | CCD |
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