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    • 5. 发明公开
    • Method for assessing image quality
    • Verfahren zur Bestimmung derBildqualität
    • EP2077527A1
    • 2009-07-08
    • EP08300006.7
    • 2008-01-04
    • Thomson Licensing
    • NINASSI, AlexandreLE MEUR, OlivierLE CALLET, PatrickBARBA, Dominique
    • G06T7/00
    • G06T7/001G06T2207/20064G06T2207/30108G06T2207/30168
    • The invention relates to a method for assessing image quality between a reference image and an impaired image. The method comprises the steps of:
      - subband decomposition (120) of the luminance component of the reference image into N subbands, called reference subbands and of the luminance component of the impaired image into N subbands, called impaired subbands;
      - errors computation (150, 160) from the reference subbands and from the impaired subbands; and
      - pooling (170) the computed the errors.
      According to the invention, the subband decomposition is based on a wavelet transform adapted to decompose each of the luminance components into L levels of decomposition, with L a positive integer determined as a function of the image height and of the distance of visualization.
    • 本发明涉及一种用于评估参考图像和受损图像之间的图像质量的方法。 该方法包括以下步骤:将被称为受损子带的参考图像的亮度分量的子带分解(120)分解为N个子带,被称为参考子带,并将受损图像的亮度分量分解成N个子带; - 来自参考子带和受损子带的误差计算(150,160); 和 - 池(170)计算出的错误。 根据本发明,子带分解基于适于将每个亮度分量分解成L分解水平的小波变换,其中L是作为图像高度和可视化距离的函数确定的正整数。