System and method for enhancing scanned document images for color printing
    1.
    发明授权
    System and method for enhancing scanned document images for color printing 有权
    用于增强扫描文档图像以进行彩色打印的系统和方法

    公开(公告)号:US06621595B1

    公开(公告)日:2003-09-16

    申请号:US09704358

    申请日:2000-11-01

    IPC分类号: H04N1409

    CPC分类号: H04N1/58 H04N1/4095

    摘要: A system and method for enhancing scanned document images utilizes an estimated background luminance of a given digital image to remove or reduce visual “see-through” noise. The estimated background luminance is dependent on the luminance values of the edges pixels of detected text edges of the image. In one embodiment, the estimated background luminance is generated using only the edge pixels that are on the lighter side of the detected edges. In addition to the see-through removal, the system and method may further enhance the scanned document images by removing color fringes and sharpening and/or darkening edges of text contained in the images.

    摘要翻译: 用于增强扫描文档图像的系统和方法利用给定数字图像的估计背景亮度来去除或减少视觉“透视”噪声。 估计的背景亮度取决于图像的检测文本边缘的边缘像素的亮度值。 在一个实施例中,仅使用在检测到的边缘的较轻一侧的边缘像素来产生估计的背景亮度。 除了透视去除之外,系统和方法可以通过去除包含在图像中的文本的边缘和边缘的锐化和/或变暗来进一步增强扫描的文档图像。