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JPEG压缩对噪声相关性影响的修正 被引量:3

Modifying the effect of JPEG compression on noise correlation
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摘要 提出了一种修正JPEG压缩对噪声相关性大小影响的新方法。该方法应用最小二乘法估计原理求出噪声相关性大小与品质因素的函数关系,根据修正的约束条件和归一化条件推导出修正函数,利用该修正函数把各种品质因素下的噪声相关性大小修正为最高品质因素下的噪声相关性大小,使得判别阈值与品质因素无关,从而修正了JPEG压缩对噪声相关性大小的影响。实验结果表明,利用该方法产生的错误拒绝率很小,但错误接受率随着品质因素的变小而变大。 A new method is proposed to modify the effect of JPEG compression on noise correlation between digital images and digital cameras.In this method,the relation function between noise correlation and the quality factor is sought by using least square estimation theory,then the modifying function is figured out based on constraint condition and normalization condition,and the value of noise correlation in any quality factor is modified to the value of noise correlation in maximal quality factor by using the mod...
作者 崔夏荣
出处 《光电子.激光》 EI CAS CSCD 北大核心 2009年第9期1258-1261,共4页 Journal of Optoelectronics·Laser
基金 福建省教育厅科技基金资助项目(JA08245)
关键词 JPEG压缩 品质因素 噪声相关性 最小二乘法 JPEG compression quality factor noise correlation least-square-method
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