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    • 65. 发明授权
    • Adaptive generation of Q-table2 for improved image quality
    • 自适应生成Q-table2,以提高图像质量
    • US07120303B2
    • 2006-10-10
    • US10183386
    • 2002-06-28
    • Joan L. MitchellRavinder Prakash
    • Joan L. MitchellRavinder Prakash
    • G06K9/36
    • H04N19/85H04N5/20H04N19/124H04N19/136H04N19/172H04N19/46H04N19/60
    • Brightness correction and image enhancement are derived to compensate for changes in captured image data by hardware scanners and the like by statistically measuring the captured data and generating or selecting a compensation quantization table to be substituted in image data encoded for compression. Three techniques of compensation usable singly or in combination are provided which may be used in combination with techniques for dynamic range reduction for extreme compression. Thus, improved images which may be enhanced in any desired manner, for example, to conform to an established image standard, may be derived from data having sufficient compression to allow economically acceptable long-term storage in high-speed access storage media even though the data captured is degraded in dynamic range, brightness and the like.
    • 导出亮度校正和图像增强,以通过统计测量所捕获的数据并生成或选择要在被压缩编码的图像数据中替换的补偿量化表来补偿由硬件扫描仪等捕获的图像数据的变化。 提供了可以单独或组合使用的三种补偿技术,其可以与用于极限压缩的动态范围缩小的技术结合使用。 因此,可以以任何期望的方式(例如,以符合建立的图像标准)来增强的改进的图像可以从具有足够压缩的数据导出,以允许在高速存取存储介质中经济上可接受的长期存储,即使 拍摄的数据在动态范围,亮度等方面下降。