全景照度理论及其测量模拟

Theory and Simulations of Measurement of Panoramic Illuminance

不同于传统照明中对平面照度的测量,全景照度是一种对空间中可视物体整体照亮程度进行评价的参数。关于其测量方法,在介绍现有的基于照度计在六个维度上测量数值的近似估算法之外,提出了一种基于高动态范围全景图的亮度分布球函数分解法,并利用球形光源模型对这两种测量方法的准确性进行了比较。结果表明,相比前一种方法,后一种方法具有更强的鲁棒性,并将推动利用身边的数码设备对全景照度进行测量。

Different from the measurement of plane illuminance in traditional lighting,panoramic illuminance is a parameter that evaluates the overall illumination of visible objects in space.Regarding its measurement method,in addition to introducing the existing approximate estimation method based on the measurement value of a cubic meter in six dimensions,a luminance distribution spherical function decomposition method based on the high dynamic range panoramic image is proposed,and a spherical light source is used to compare the accuracy of these two measurement methods.The results show that,compared with the former method,the latter method is more robust and will promote the use of digital equipment around to measure the panoramic illuminance.