公开(公告)号：US06317223B1

公开(公告)日：2001-11-13

申请号：US09211600

申请日：1998-12-14

申请人： Peter Rudak ,  Yongchun Lee ,  James M. Stefanko

发明人： Peter Rudak ,  Yongchun Lee ,  James M. Stefanko

IPC分类号： G06T550

CPC分类号： H04N1/4097

摘要： A digital image processing system applies an edge-based adaptive thresholding technique with different contrast parameters to convert an image into first and second binary images. In the digital processing system of the invention, the first and second binary images are compared and a map of the difference between the first and second binary images is generated. A vertical profile of this map is projected and local peaks in the vertical profile which correspond to a vertical pattern or artifact in the map is detected. Pixels in the first binary image are reversed based on the vertical pattern or artifact in the map. This system is effective in reducing vertical artifacts produced by scanners.

摘要翻译： 数字图像处理系统将具有不同对比度参数的基于边缘的自适应阈值技术应用于将图像转换为第一和第二二进制图像。 在本发明的数字处理系统中，比较第一和第二二进制图像并生成第一和第二二进制图像之间的差异的映射。 投影该地图的垂直剖面，并检测对应于地图中的垂直图案或伪影的垂直剖面中的局部峰值。 基于地图中的垂直图案或伪像，第一个二进制图像中的像素被颠倒。 该系统有效减少扫描仪产生的垂直伪影。