彩色数码相机光强传递函数的场景曝光标定  

Calibration based on scene-exposure for intensity response function of digital color camera

作　　者：吴波[1] 符泰然[1] 程晓舫[1] 

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027

出　　处：《光学技术》2006年第6期916-919,共4页Optical Technique

摘　　要：由传感曲线的数学特征表明,有限项多项式完全可以满足传感器函数的拟合及其精度。通过定义相对光强和推导出与传感器函数等价的光强传递函数,建立了场景标定原理。仅改变曝光时间,保持相机的其它参数不变,建立了曝光标定原理。将两种标定原理相结合,形成了关于彩色数码相机光强传递函数的场景曝光标定方法,并对Olym-pus E-20p数码相机进行了标定。The mathematic characteristics of .sensor curve show that limited item of polynomial can fit the sensor function very well. The equivalent sensor function and the principle of scene calibration are established by defining relative intensity re sponse. The principle of exposure duration calibration is formed by adjusting exposure duration and keeping other parameters of digital color camera. Combined these two principles, the method of scene-exposure calibration for intensity response of digital color camera is put forward. The method is used to calibrate the digital odor camera——Olympus-E20.

关 键 词：传递函数 一般场景 数码相机 曝光时间 

分 类 号：TB852.1[一般工业技术—摄影技术] TH706[机械工程—仪器科学与技术]