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    • 5. 发明申请
    • IMAGE QUALITY EVALUATION METHOD AND APPARATUS THEREOF
    • 图像质量评估方法及其设备
    • US20070153309A1
    • 2007-07-05
    • US11614296
    • 2006-12-21
    • Nobuatsu SASANUMATomohisa ITAGAKIMasami TOMITAToshio SAISHOJISatoshi TAKAYAMAMiyoko HAYASHI
    • Nobuatsu SASANUMATomohisa ITAGAKIMasami TOMITAToshio SAISHOJISatoshi TAKAYAMAMiyoko HAYASHI
    • H04N1/60
    • H04N1/6094
    • Upon observing homogeneity in page image by the human eye, a permissible level associated with color reproduction with respect to an identical color signal changes depending on the distance from an interest point. Since the conventional homogeneity in page image evaluation scheme doesn't take the above characteristics into consideration, the correlation between a finished image and the evaluation result cannot be exploited fully. Hence, image data, which forms an image with identical density within a range to be evaluated in one page, is output to a printer to measure reflection characteristics of the image at points on output of the printer. One point is set as a reference point, and distances between the reference point and the remaining points, and differences of the reflection characteristic between the reference point and the remaining points are calculated. The image quality within the range is evaluated based on the distances and differences.
    • 在通过人眼观察页面图像的均匀性时,与相同颜色信号的颜色再现相关联的允许电平根据与兴趣点的距离而变化。 由于页面图像评估方案中的常规均匀性不考虑上述特征,所以完成的图像与评估结果之间的相关性不能被充分利用。 因此,在打印机的输出点输出打印机,从而将在一个页面中评价的范围内形成具有相同密度的图像的图像数据输出到打印机。 将一点设定为参考点,并计算参考点与剩余点之间的距离以及参考点与其余点之间的反射特性的差异。 基于距离和差异评估范围内的图像质量。