公开(公告)号：US20050174360A1

公开(公告)日：2005-08-11

申请号：US10775012

申请日：2004-02-09

Applicant: Scott Daly ,  Xiao-fan Feng

Inventor： Scott Daly ,  Xiao-fan Feng

IPC: G09G3/20 ,  G09G3/36 ,  G09G5/02

CPC classification number: G09G3/2055 ,  G09G3/2003 ,  G09G3/3611 ,  G09G2360/16

Abstract: Embodiments of the present invention comprise methods and systems for adaptive dither pattern array generation and application.

Abstract translation: 本发明的实施例包括用于自适应抖动图案阵列生成和应用的方法和系统。

公开(公告)号：US20050147317A1

公开(公告)日：2005-07-07

申请号：US10746423

申请日：2003-12-24

Applicant: Scott Daly ,  Xiao-fan Feng

Inventor： Scott Daly ,  Xiao-fan Feng

IPC: G06T5/00 ,  G06T5/20 ,  H04N1/409

CPC classification number: G06T5/004 ,  H04N1/409

Abstract: A system for image enhancement and, more particularly, a system for enhancing the quality of a quantized image.

公开(公告)号：US6043900A

公开(公告)日：2000-03-28

申请号：US052638

申请日：1998-03-31

Applicant: Xiao-fan Feng ,  Roger L. Triplett

Inventor： Xiao-fan Feng ,  Roger L. Triplett

IPC: G06T5/40 ,  H04N1/407 ,  G06K15/02

CPC classification number: H04N1/4072 ,  G06T5/009 ,  G06T5/40 ,  G06T2207/10008

Abstract: A method and system automatically determines proper background values for a document. A histogram of the document is generated and it is determined whether a background characteristic of the document is uniform. If the background is uniform, a white background value is set equal to a first calculated white peak value. If the background is non-uniform, the white background value is set equal to a second calculated white peak value. A foreground value of the document is analyzed for validity when it is determined that a background characteristic of the document is uniform. A black background value is set equal to a black peak value calculated from the histogram when it is determined that a foreground value of the document is valid.

Abstract translation: 方法和系统自动确定文档的正确背景值。 生成文档的直方图，确定文档的背景特征是否均匀。 如果背景是均匀的，则将白色背景值设置为等于第一计算的白色峰值。 如果背景不均匀，则将白色背景值设置为等于第二计算的白色峰值。 当确定文档的背景特征是均匀的时，分析文档的前景值的有效性。 当确定文档的前景值有效时，黑色背景值被设置为等于从直方图计算的黑色峰值。