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Improving Color Reproduction Accuracy on Cameras

机译:提高摄像机上的颜色再现精度

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One of the key operations performed on a digital camera is to map the sensor-specific color space to a standard perceptual color space. This procedure involves the application of a white-balance correction followed by a color space transform. The current approach for this colorimetric mapping is based on an interpolation of pre-calibrated color space transforms computed for two fixed illuminations (i.e., two white-balance settings). Images captured under different illuminations are subject to less color accuracy due to the use of this interpolation process. In this paper, we discuss the limitations of the current colorimetric mapping approach and propose two methods that are able to improve color accuracy. We evaluate our approach on seven different cameras and show improvements of up to 30% (DSLR cameras) and 59% (mobile phone cameras) in terms of color reproduction error.
机译:在数码相机上执行的关键操作之一是将传感器特定的颜色空间映射到标准感知颜色空间。该过程涉及应用白平衡校正,然后是彩色空间变换。该比色映射的当前方法基于针对两个固定照度计算的预校准颜色空间变换的插值(即,两个白平衡设置)。由于使用此插值过程,在不同的照明下捕获的图像可能会降低颜色准确性。在本文中,我们讨论了当前比色映射方法的局限性,并提出了两种能够提高颜色精度的方法。我们在七种不同的摄像机上评估了我们的方法,并在颜色再现误差方面显示了高达30%(DSLR相机)和59%(移动电话摄像机)的改进。

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