Automatic exposure in computer graphics based on the minimum information loss principle

L. Neumann, K. Matkovič, W. Purgathofer
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引用次数: 27

Abstract

The available contrast of common display devices is much lower than image data often demand. Usually a variant of an average of the field of view is used to normalize the image. An alternative approach is introduced to define the mapping of rendered values to the displayable intensity range. The luminance range is chosen such that a minimum amount of information is lost thereby preserving the contrast ratio of all correctly displayed parts. The loss of information can be regulated by different error functions. If the loss is too large, the luminance range can be increased, but the original contrast is not presented any more. In this case the method represents an improvement of Schlick's (1994) mapping technique. The newly introduced method can be applied on color and gray scale images, rendered in absolute or fictitious units.
计算机图形学中基于最小信息丢失原理的自动曝光
普通显示设备的可用对比度远低于图像数据的需求。通常使用视场平均值的变体来对图像进行归一化。引入了另一种方法来定义渲染值到可显示强度范围的映射。所选择的亮度范围使得丢失的信息量最小,从而保留所有正确显示部分的对比度。信息的丢失可以通过不同的误差函数来调节。如果损失太大,可以增加亮度范围,但不再呈现原来的对比度。在这种情况下,该方法代表了Schlick(1994)映射技术的改进。新引入的方法可以应用于彩色和灰度图像,以绝对或虚拟单位呈现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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