公开(公告)号：EP1360641A4

公开(公告)日：2008-12-24

申请号：EP01985991

申请日：2001-11-19

Applicant: IBM

Inventor： MITCHELL JONA L ,  PRAKASH RAVINDER ,  STEPNESKI DAVID

IPC: H04N1/413 ,  H04N7/30 ,  H04N1/41

CPC classification number: H04N19/98 ,  H04N19/126 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/40 ,  H04N19/46 ,  H04N19/60

Abstract: Increased and potentially extreme compression of documents is achieved by reducing/remapping the dynamic range (140) of the document image possibly together with further image analysis (110) and pre-processing (120) and storing the document with a substitute table to restore dynamic range (170) of the document image. Such increased compression allow document images to be maintained in rapid-access memory for extended periods without increased storage costs.

公开(公告)号：WO02058000A8

公开(公告)日：2004-04-08

申请号：PCT/US0143631

申请日：2001-11-19

Applicant: IBM

Inventor： MITCHELL JONA L ,  PRAKASH RAVINDER ,  STEPNESKI DAVID

IPC: H04N1/413 ,  H04N1/41 ,  H04N7/30 ,  G06K9/36

CPC classification number: H04N19/98 ,  H04N19/126 ,  H04N19/14 ,  H04N19/176 ,  H04N19/18 ,  H04N19/40 ,  H04N19/46 ,  H04N19/60

Abstract: Increased and potentially extreme compression of documents is achieved by reducing/remapping the dynamic range (140) of the document image possibly together with further image analysis (110) and pre-processing (120) and storing the document with a substitute table to restore dynamic range (170) of the document image. Such increased compression allow document images to be maintained in rapid-access memory for extended periods without increased storage costs.

Abstract translation: 通过减少/重新映射文​​档图像的动态范围（140）可能与进一步的图像分析（110）和预处理（120）一起实现文档的增加和潜在的极端压缩，并且用替换表存储文档以恢复动态 范围（170）的文档图像。 这种增加的压缩允许文件图像在快速存取存储器中长时间地维持，而不增加存储成本。

公开(公告)号：DE60140959D1

公开(公告)日：2010-02-11

申请号：DE60140959

申请日：2001-11-19

Applicant: IBM

Inventor： MITCHELL JONA L ,  PRAKASH RAVINDER ,  STEPNESKI DAVID

IPC: G06K9/36 ,  H04N1/413 ,  H04N1/41 ,  H04N7/30

Abstract: Increased and potentially extreme compression of documents is achieved by reducing/remapping the dynamic range of the document image possibly together with further image analysis and pre-processing and storing the document together with a substituted table of values chosen to restore or enhance the dynamic range of the document image. Increased or extreme compression is provided notwithstanding multiple image tones (e.g. colors or grey scale levels) even at low contrast within a document, such as a personal check. Such increased compression allows document images to be maintained in rapid-access memory for extended periods without increased storage costs.