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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 mathematical characteristics of the sensing curve show that the finite-element polynomial can satisfy the fitting of the sensor function and its accuracy. By defining the relative light intensity and deriving the light intensity transfer function equivalent to the sensor function, the scene calibration principle is established. Only change the exposure time, keep the other camera parameters unchanged, established the principle of exposure calibration. The two calibration principles are combined to form a scene exposure calibration method for the light intensity transfer function of a color digital camera. The Olym-pus E-20p digital camera is calibrated.