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（光照不均匀图像的校正二〇一六年六月摘要光照不均匀图像的校正是图像处理的一个基础性问题，它的基础性在于它是图像深度处理的铺垫。光照不均匀图像的校正也是数字图像处理的一个前沿问题，它的前沿性在于待研究的领域很多。所以光照不均匀图像校正这个课题兼具理论性与工程性，通过对这个课题的研究可以帮助我们获得更多的已知，探究更多的未知。实际成像环境中因受到光源光照不佳、物体表面采光不均等因素影响，所拍摄的图像往往是目标与背景差别较小且光照不均匀的。光照不均匀体现在图像光照亮度不均匀、直方图上波峰与峰谷杂乱无章，造成图像的分割效果差、有效信息识读困难。本次设计采用线阵CCD摄像机采集矿用输送带上皮带图像，光源采用白色线性光源。因上皮带呈弧状，光源光照很难达到均匀，且在输送带的宽度方向上各点采光不均，加上输送带表面的划痕、煤泥、水痕等因素影响，所采集的图像是光照不均匀图像。在对不均匀光照图像的传统处理方法和线阵相机所采集图像特性进行深入分析的基础上，提出了一种光照不均匀的非线性校正方法。通过将本文方法与同态滤波、概率统计方法进行比较分析，本文方法算法结构简单、处理速度快、校正效果优越，为后续的图像处理、识别奠定了的基础。关键词：非线性校正；光照不均匀；图像增强；图像处理AbstractUneven illumination image correction is a basic problem of image processing, it is fundamental that it is foreshadowing image depth processing. Uneven illumination image correction digital image processing is a cutting-edge issues, it is that many frontier areas to be studied. So uneven illumination image correcting this issue both theoretical and engineering properties, through the study of this subject can help us get more known, to explore more unknown.Actual imaging environment impact due to poor light by the light source, the surface uneven lighting and other factors, the captured image is often little difference between the target and background and uneven lighting. Uneven illumination image reflected in the uneven illumination brightness, histogram peaks and valley disorganized, resulting in poor image segmentation results, valid information reading difficulties. This design uses linear CCD cameras capture images mine conveyor belt, a white light source using a linear light source.As the belt rounded in difficult to achieve uniform illumination light source, and in the width direction of each of the conveyor belt point uneven lighting, coupled with the conveyor belt impact scratches, slime, surface water marks and other factors, the acquired images are uneven illumination image.On the basis of image characteristics of uneven illumination image processing method and traditional line scan cameras collected in-depth analysis of th