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    • 2. 发明申请
    • ADAPTIVE CONTRAST ADJUSTMENT TECHNIQUES
    • 自适应对比度调整技术
    • US20120250988A1
    • 2012-10-04
    • US13074257
    • 2011-03-29
    • Ya-Ti PengYi-Jen Chiu
    • Ya-Ti PengYi-Jen Chiu
    • G06K9/00
    • G06T5/40G06K9/38G06T2207/10016G06T2207/10024
    • Techniques are disclosed involving contrast adjustment for images. For example, an input image is classified based on its pixel value characteristics, as expressed in an input brightness histogram. From such a classification, a target histogram distribution for a corresponding output image (i.e., a contrast-adjusted transformation of the input image) may be specified. With the target histogram of the output image specified, a transformation function may be derived that maps input image values to output image values. Moreover, transitions of such transformation functions may be smoothed. Such smoothing may provide advantages, such as a reduction in flickering associated with video data.
    • 公开了涉及图像的对比度调整的技术。 例如,输入图像根据输入亮度直方图所表示的像素值特性进行分类。 根据这样的分类,可以规定对应的输出图像的目标直方图分布(即输入图像的对比度调整变换)。 利用指定的输出图像的目标直方图,可以导出将输入图像值映射到输出图像值的变换函数。 此外,这种变换函数的转换可以被平滑化。 这种平滑可以提供诸如减少与视频数据相关联的闪烁的优点。
    • 10. 发明授权
    • Adaptive contrast adjustment techniques
    • 自适应对比度调整技术
    • US08639031B2
    • 2014-01-28
    • US13074257
    • 2011-03-29
    • Ya-Ti PengYi-Jen Chiu
    • Ya-Ti PengYi-Jen Chiu
    • G06K9/00G06K9/40
    • G06T5/40G06K9/38G06T2207/10016G06T2207/10024
    • Techniques are disclosed involving contrast adjustment for images. For example, an input image is classified based on its pixel value characteristics, as expressed in an input brightness histogram. From such a classification, a target histogram distribution for a corresponding output image (i.e., a contrast-adjusted transformation of the input image) may be specified. With the target histogram of the output image specified, a transformation function may be derived that maps input image values to output image values. Moreover, transitions of such transformation functions may be smoothed. Such smoothing may provide advantages, such as a reduction in flickering associated with video data.
    • 公开了涉及图像的对比度调整的技术。 例如,输入图像根据输入亮度直方图所表示的像素值特性进行分类。 根据这样的分类,可以规定对应的输出图像的目标直方图分布(即输入图像的对比度调整变换)。 利用指定的输出图像的目标直方图,可以导出将输入图像值映射到输出图像值的变换函数。 此外,这种变换函数的转换可以被平滑化。 这种平滑可以提供诸如减少与视频数据相关联的闪烁的优点。