彩色数码相机光强响应特性的标定实验  

Calibration experiment for intensity response characteristics of digital color camera

作　　者：吴波[1] 符泰然[1] 程晓舫[1] 袁耀明[1] 郑小兵[2] 章骏平[2] 

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230026 [2]中国科学院安徽光学精密机械研究所遥感部,安徽合肥230031

出　　处：《光电工程》2006年第6期101-105,共5页Opto-Electronic Engineering

基　　金：教育部高等学校博士学科点专项科研基金项目(97035821)

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。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 γ 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.

关 键 词：CCD 光强响应 数码相机 标定 

分 类 号：TB852[一般工业技术—摄影技术]