基于双边滤波的HDR图像色调映射算法

高动态范围(HDR)图像是一种表达了超过一般显示器所能表示的真实场景中亮度大范围变化的图像类型,能够很好地区分场景的明暗区域,呈现更多的细节信息.为了能够在低动态范围显示器上显示HDR图像,需要进行动态范围压缩.采用一种基于双边滤波的HDR图像动态范围压缩算法,首先计算每个像素点亮度值,然后对其进行双边滤波处理,最后进行对比度的压缩并生成最终的图像.实验结果表明,该算法合成的HDR图像整体明暗效果较好,细节信息丰富.

HDR image tone mapping algorithms based on bilateral filtering

High dynamic range (HDR) image is a kind of image type which expresses more brightness range in the real scene than the general brightness of the display can be represented,it can well distinguish light and dark areas of the scene,showing more details.To be displayed on a low dynamic range of the display,the dynamic range compression is required.This paper introduces the HDR dynamic range compression algorithm based on bilateral filtering.The algorithm at first calculates the luminance value of each pixel,then subjects it to bilateral filtering process,finally compresses the contrast of the image to generate HDR image.Experimental results show that HDR imageuhiuhis(generated by this algorithm),achieves a better result in overall brightness,containing richer details.