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Exposure adjustment of an image using G+/G− curve
Exposure adjustment of an image using G+/G− curve
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机译:使用G + / G−曲线对图像进行曝光调整
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摘要
An improved exposure adjustment technique for brightening and darkening an image using a modified Gamma-like (G+) function is provided. The G+ function possesses characteristics such that, when applied brightening an image, the darker pixels are not enhanced too quickly when brightening, and the lighter pixels are not decreased too quickly when darkening. Two pertinent characteristics include the fact that the slope of the G+ function is not infinite at the origin, where “origin” corresponds to black pixels, and the slope near the origin, where corresponding to pixels are relatively dark, is lower than the slope of a conventional Gamma-like function.
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机译:提供了一种改进的曝光调节技术,该技术可以使用改进的类似伽玛(G +)的功能使图像变亮和变暗。 G +功能具有以下特征:在应用增亮图像时,增亮时较暗的像素不会太快增强,而变暗时较亮的像素不会太快降低。两个相关的特征包括以下事实:G +函数的斜率在原点处不是无限的,其中“原点”对应于黑色像素,而在原点附近的斜率(在此对应于像素相对较暗)低于G +函数的斜率。传统的伽玛函数。
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