基于颜色视觉过程的高动态范围图像映射方法

HDR Image Rendition Method Based on Color Vision Pathway

  • 摘要: 为解决低动态范围显示设备显示高动态范围图像所产生的问题,提出一种基于颜色视觉过程的高动态范围图像映射方法. 此方法通过模拟人眼颜色视觉处理信息的过程压缩图像的动态范围,解决动态范围压缩导致细节丢失等问题. 模拟光感应细胞的响应机制,在各适应性亮度下,进行色度适应性调整,并获得其适应性亮度下的相对响应值;利用主成分分析(PCA)方法转换到正交对立颜色空间,模拟颜色视觉中的边缘相阻机制,进一步处理后得到适合低动态范围显示设备的图像. 在实验中,通过主观和客观评价,并与国际上一些映射方法比较发现,该方法适用于各

     

    Abstract: A high dynamic range (HDR) image rendition method based on color vision pathway is proposed in order to display HDR images on ordinary display devices with low dynamic range. This method mimics the way of color vision pathway to compress dynamic range of HDR images, which can reconstruct the lost visible details during displaying HDR images. On the first stage of this method, chromaticity of the HDR image is adapted and then the relative photoreceptor response of each pixel is computed based on each adapted luminance level. On the second stage, the results from the first stage are transformed to orthogonal opponent color space by PCA, and then process them to meet the request of display devices with low dynamic range according to lateral inhibition mechanism of color vision. Finally, the obtained images can fit to typical display devices. The experimental results, by subjective evaluation, objective evaluation and comparison with some excellent rendition methods, demonstrate that the proposed method has good performance on rendition of visible fine details of original HDR images with various high dynamic range.

     

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