公开(公告)号：US06185335B2

公开(公告)日：2001-02-06

申请号：US09111047

申请日：1998-07-07

申请人： Ron J. Karidi ,  Niklas Nordstrom

发明人： Ron J. Karidi ,  Niklas Nordstrom

IPC分类号： G06K962

CPC分类号： H04N1/40062

摘要： A method and apparatus for image classification includes a first embodiment, in which halftone detection is performed based on the size of a boundary set between a class of light pixels and a class of dark pixels, and further based upon image information contained within each single image plane (i.e within one color plane). This embodiment of the invention is based upon the distinctive property of images that halftone areas within the image have larger boundary sets than non-halftone areas within the image. A second, equally preferred embodiment of the invention provides a cross color difference correlation technique that is used to detect halftone pixels.

摘要翻译： 用于图像分类的方法和装置包括第一实施例，其中基于在一类光像素和一类暗像素之间设置的边界的大小进行半色调检测，并且还基于包含在每个单个图像内的图像信息 （即在一个颜色平面内）。 本发明的该实施例基于图像中的半色调区域与图像内的非半色调区域相比具有更大边界集的图像的特征。 本发明的第二个同样优选的实施例提供了用于检测半色调像素的交叉色差相关技术。