JP2005228342A - 走査された書類の区分方法及びシステム - Google Patents
走査された書類の区分方法及びシステム Download PDFInfo
- Publication number
- JP2005228342A JP2005228342A JP2005036118A JP2005036118A JP2005228342A JP 2005228342 A JP2005228342 A JP 2005228342A JP 2005036118 A JP2005036118 A JP 2005036118A JP 2005036118 A JP2005036118 A JP 2005036118A JP 2005228342 A JP2005228342 A JP 2005228342A
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- JP
- Japan
- Prior art keywords
- value
- signal
- edge
- pixel
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/40062—Discrimination between different image types, e.g. two-tone, continuous tone
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/11—Region-based segmentation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/12—Edge-based segmentation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/194—Segmentation; Edge detection involving foreground-background segmentation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/16—Image preprocessing
- G06V30/162—Quantising the image signal
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/40—Document-oriented image-based pattern recognition
- G06V30/41—Analysis of document content
- G06V30/413—Classification of content, e.g. text, photographs or tables
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10004—Still image; Photographic image
- G06T2207/10008—Still image; Photographic image from scanner, fax or copier
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20004—Adaptive image processing
- G06T2207/20012—Locally adaptive
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20172—Image enhancement details
- G06T2207/20192—Edge enhancement; Edge preservation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30176—Document
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
Abstract
【解決手段】本発明の方法及びシステムは、画像データを受け取り対象ピクセル周囲のウィンドウ内で従属最小値及び従属最大値を生成する従属最小・最大モジュールを有する。従属最小値及び従属最大値に基づき、動的閾値モジュールが例えばブロブ識別に適した連続性データ及び強調化データを発生する。
【選択図】 図3
Description
を示す。
EH=[GME+(MAX−GME)(ENL/256)] (1)
として生成する。これに対して、第二内挿モジュール2653は各ピクセルごとにより暗いエッジ強調化画像データELを:
EL=[GME+(MIN−GME)(ENL/256)] (2)
として生成する。
ここで<X,Y>はベクトルX、Y間のドット積操作を示す。従って、
<X,Y>=(XL,XA,BB)(YL,YA,YB)t=XLYL+XAYA+XBYB (4)
ここで
(Mn0*1LoCmp) (7)
但し、
Mx0は調整された最大輝度(非線形の場合)
Mn0は調整された最小輝度(非線形の場合)
1HiCmp=256−SegLumHiConThr
1LoCmp=256−SegLumLoConThr
SegLumHiConThrは約40のパラメータ
SegLumLoConThrは約80のパラメータ
である。
輝度Lは正の領域[0…255]に限定されており、また最大値は常に最小値より大きいので、輝度成分の絶対値は無視可能である。
Claims (3)
- エッジ連続性ピクセルデータを生成する方法に於いて、
ピクセルの第一近傍の最大輝度値及び最小輝度値に基づいてピクセルをエッジピクセルと識別する工程と、
最大輝度値及び付随するクロマ値と最小輝度値及び付随するクロマ値とのドット積に基づいてエッジピクセルの極性値を設定する工程と、
を有することを特徴とする方法。 - エッジ連続性ピクセルデータを生成する装置に於いて、
ピクセルの第一近傍の最大輝度値及び最小輝度値に基づいて最大輝度値及び付随するクロマ値と最小輝度値及び付随するクロマ値とを出力する最小・最大値発生器と、
最大輝度値及び付随するクロマ値と最小輝度値及び付随するクロマ値とのドット積に基づいてピクセルの極性値を発生するドット積乗算器と、
を有することを特徴とする装置。 - データ処理装置で実施可能な一組のプログラム指令を記憶する記憶媒体であって、前記一組のプログラム指令が、
ピクセルの第一近傍の最大輝度値及び最小輝度値に基づいてピクセルをエッジピクセルと識別する指令と、
最大輝度値及び付随するクロマ値と最小輝度値及び付随するクロマ値とのドット積に基づいてエッジピクセルの極性値を設定する指令と、
を有することを特徴とする記憶媒体。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/776,516 US7324120B2 (en) | 2002-07-01 | 2004-02-12 | Segmentation method and system for scanned documents |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005228342A true JP2005228342A (ja) | 2005-08-25 |
JP4680622B2 JP4680622B2 (ja) | 2011-05-11 |
Family
ID=34711834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005036118A Expired - Fee Related JP4680622B2 (ja) | 2004-02-12 | 2005-02-14 | 分類装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7324120B2 (ja) |
EP (1) | EP1566768B1 (ja) |
JP (1) | JP4680622B2 (ja) |
TW (1) | TWI380675B (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005228341A (ja) * | 2004-02-12 | 2005-08-25 | Xerox Corp | 画像データを領域へ編成するシステムおよび方法 |
WO2010101292A1 (en) * | 2009-03-03 | 2010-09-10 | Sharp Kabushiki Kaisha | Method of and apparatus for processing a video image |
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JP3792149B2 (ja) * | 2001-11-12 | 2006-07-05 | 任天堂株式会社 | 画像処理装置および画像処理プログラム |
US20040032412A1 (en) * | 2002-08-13 | 2004-02-19 | Odom Brian Keith | Generating a graphical program based on a timing diagram |
US7139442B2 (en) * | 2002-12-16 | 2006-11-21 | Xerox Corporation | Template matching applied to selector planes for multiple raster content (MRC) representation of documents |
JP2004336453A (ja) * | 2003-05-08 | 2004-11-25 | Ricoh Co Ltd | 複写機、画像処理システム、プログラム及び記憶媒体 |
JP4095530B2 (ja) * | 2003-10-01 | 2008-06-04 | キヤノン株式会社 | 画像処理装置及び方法 |
US20050265600A1 (en) * | 2004-06-01 | 2005-12-01 | Xerox Corporation | Systems and methods for adjusting pixel classification using background detection |
US8204306B2 (en) * | 2004-06-14 | 2012-06-19 | Xerox Corporation | Method for image segmentation based on block clustering for improved processing of touching characters |
US7783117B2 (en) * | 2005-08-12 | 2010-08-24 | Seiko Epson Corporation | Systems and methods for generating background and foreground images for document compression |
US7899258B2 (en) * | 2005-08-12 | 2011-03-01 | Seiko Epson Corporation | Systems and methods to convert images into high-quality compressed documents |
US8849031B2 (en) * | 2005-10-20 | 2014-09-30 | Xerox Corporation | Document analysis systems and methods |
US8085416B2 (en) * | 2005-12-08 | 2011-12-27 | Xerox Corporation | Method and system for color highlighting of text |
WO2007081234A1 (fr) * | 2006-01-12 | 2007-07-19 | Otkrytoe Aktsionernoe Obschestvo 'bineuro' | Procede de codage de la semantique de documents-textes |
JP4764231B2 (ja) * | 2006-03-31 | 2011-08-31 | キヤノン株式会社 | 画像処理装置、制御方法、コンピュータプログラム |
US8179556B2 (en) * | 2007-03-26 | 2012-05-15 | Xerox Corporation | Masking of text in document reproduction |
US7894689B2 (en) * | 2007-05-31 | 2011-02-22 | Seiko Epson Corporation | Image stitching |
US8155437B2 (en) * | 2007-09-07 | 2012-04-10 | CVISION Technologies, Inc. | Perceptually lossless color compression |
JP4766030B2 (ja) * | 2007-10-11 | 2011-09-07 | 富士ゼロックス株式会社 | 画像処理装置及び画像処理プログラム |
US7992087B1 (en) * | 2008-02-27 | 2011-08-02 | Adobe Systems Incorporated | Document mapped-object placement upon background change |
US8165388B2 (en) * | 2008-03-05 | 2012-04-24 | Xerox Corporation | Neutral pixel detection in an image path |
US7843616B2 (en) * | 2008-03-27 | 2010-11-30 | Xerox Corporation | Background suppression in a multi-function color scanning system |
US8111918B2 (en) * | 2008-10-20 | 2012-02-07 | Xerox Corporation | Segmentation for three-layer mixed raster content images |
US8473467B2 (en) * | 2009-01-02 | 2013-06-25 | Apple Inc. | Content profiling to dynamically configure content processing |
US8532437B2 (en) * | 2009-05-18 | 2013-09-10 | Citrix Systems, Inc. | Systems and methods for block recomposition for compound image compression |
US8565531B2 (en) * | 2009-10-09 | 2013-10-22 | Xerox Corporation | Edge detection for mixed raster content (MRC) images for improved compression and image quality |
TWI420403B (zh) * | 2009-11-13 | 2013-12-21 | Primax Electronics Ltd | 影像處理方法及影像處理裝置 |
US8335379B2 (en) * | 2009-12-28 | 2012-12-18 | Xerox Corporation | System and method for cleanup of MRC images for improved compression and image quality |
US8340363B2 (en) | 2010-05-27 | 2012-12-25 | Palo Alto Research Center Incorporated | System and method for efficient interpretation of images in terms of objects and their parts |
US9288484B1 (en) | 2012-08-30 | 2016-03-15 | Google Inc. | Sparse coding dictionary priming |
US9300906B2 (en) | 2013-03-29 | 2016-03-29 | Google Inc. | Pull frame interpolation |
US9286653B2 (en) | 2014-08-06 | 2016-03-15 | Google Inc. | System and method for increasing the bit depth of images |
US9153017B1 (en) | 2014-08-15 | 2015-10-06 | Google Inc. | System and method for optimized chroma subsampling |
US9438769B1 (en) * | 2015-07-23 | 2016-09-06 | Hewlett-Packard Development Company, L.P. | Preserving smooth-boundaried objects of an image |
US10152630B2 (en) | 2016-08-09 | 2018-12-11 | Qualcomm Incorporated | Methods and systems of performing blob filtering in video analytics |
CN107086027A (zh) * | 2017-06-23 | 2017-08-22 | 青岛海信移动通信技术股份有限公司 | 文字显示方法及装置、移动终端及存储介质 |
US10832049B2 (en) | 2018-05-31 | 2020-11-10 | Intematlonal Business Machlnes Corporation | Electronic document classification system optimized for combining a plurality of contemporaneously scanned documents |
US10915546B2 (en) | 2018-10-10 | 2021-02-09 | Micron Technology, Inc. | Counter-based compaction of key-value store tree data block |
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2004
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-
2005
- 2005-02-05 TW TW094103881A patent/TWI380675B/zh not_active IP Right Cessation
- 2005-02-10 EP EP05100937.1A patent/EP1566768B1/en not_active Expired - Fee Related
- 2005-02-14 JP JP2005036118A patent/JP4680622B2/ja not_active Expired - Fee Related
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Cited By (3)
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JP2005228341A (ja) * | 2004-02-12 | 2005-08-25 | Xerox Corp | 画像データを領域へ編成するシステムおよび方法 |
JP4587832B2 (ja) * | 2004-02-12 | 2010-11-24 | ゼロックス コーポレイション | 画像データ内で識別された領域を編成する方法及び装置 |
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Also Published As
Publication number | Publication date |
---|---|
TW200541311A (en) | 2005-12-16 |
EP1566768A3 (en) | 2008-09-24 |
TWI380675B (en) | 2012-12-21 |
EP1566768A2 (en) | 2005-08-24 |
US7324120B2 (en) | 2008-01-29 |
EP1566768B1 (en) | 2016-05-18 |
JP4680622B2 (ja) | 2011-05-11 |
US20040227758A1 (en) | 2004-11-18 |
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