图像亮度测量的几何校正技术研究

Studies on Geometric Calibration Technology of Image-based Luminance Measurement

近年来图像亮度测量的亮度校正技术日益引起广泛关注,而鲜有开展图像亮度几何校正技术的研究,从而制约了该技术在照明环境质量领域的应用和推广。本文在相机线性数学模型的基础上,引入径向畸变、偏心畸变等非线性变量提高了图像亮度测试系统的精度,建立了能够满足实践需要具有较高精度的数码相机几何映射模型,为下一步利用数码相机进行测量、评价眩光以及天空亮度测试等项目的研究奠定了技术基础。

In recent years,luminance calibration technology of image-based luminance measurement has attracted increasing attention,but there is little research available on geometric calibration technology of image-based luminance,which restricts application and promotion of the technology in quality area of luminous environment.This paper bases itself on linear mathematic model of camera,introduces non-linear variables such as radial distortion,decentering distortion,etc.,improves the accuracy of image brightness test system,establishes digital camera geometric mapping model with relatively high accuracy required in practices,and lays a technical foundation for researches on items such as measurement and evaluation of glare as well as sky brightness test,etc.by means of digital camera.