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1. 发明公开

EP1831823A4 SEGMENTING DIGITAL IMAGE AND PRODUCING COMPACT REPRESENTATION 有权
标题翻译：数字图像的分割，使一个紧凑表示
公开(公告)号：EP1831823A4
公开(公告)日：2009-06-24
申请号：EP05818582
申请日：2005-12-20
申请人： CANON KK
发明人： ANDREW JAMES PHILIP , BESLEY JAMES AUSTIN , IRRGANG STEVEN , CHEN YU-LING , CHONG ERIC WAI-SHING , LAWTHER MICHAEL JAN , WARK TIMOTHY JOHN
IPC分类号： G06K9/34 , G06T7/00
CPC分类号： G06K9/00456 , G06K9/38 , G06K2209/01 , G06T7/11 , G06T2207/10024 , G06T2207/30176
摘要： A method (100), an apparatus, and a computer program product for automatically producing a compact representation of a colour document are disclosed. In the method, a digital image of a colour-document page is segmented (110) into connected components in one-pass, block raster order. The digital image of the page is partitione into foreground and background images using layout analysis (120) based on compact, connected-component statistics of the whole page. At least one portion of the background image where at least one portion of the foreground image obscures the background image is inpainting (520) in one-pass block raster order. The foreground and background images are combined (130) to form a compact document. A method, an apparatus, and a computer program product for segmenting a digital image comprising a plurality of pixels are also disclosed.

2. 发明专利

AU2009233625A1 Progressive window colour quantisation 未知
公开(公告)号：AU2009233625A1
公开(公告)日：2011-05-19
申请号：AU2009233625
申请日：2009-10-30
申请人： CANON KK
发明人： PAN RUMIN , YUEN EDMUND , CHEN YU-LING
IPC分类号： G06T9/20

3. 发明专利

AU2008260130A1 Graphics object extraction in compound colour documents 未知
公开(公告)号：AU2008260130A1
公开(公告)日：2010-07-08
申请号：AU2008260130
申请日：2008-12-18
申请人： CANON KK
发明人： CHEN YU-LING
IPC分类号： G06T7/40

4. 发明专利

AU2004233516A1 Tree-based compositing system 未知
公开(公告)号：AU2004233516A1
公开(公告)日：2005-06-16
申请号：AU2004233516
申请日：2004-11-26
申请人： CANON KK
发明人： CHEN YU-LING
IPC分类号： G06T11/00

5. 发明专利

AU2014277851A1 Detecting a gap between text columns from text line fragments 未知
公开(公告)号：AU2014277851A1
公开(公告)日：2016-07-07
申请号：AU2014277851
申请日：2014-12-22
申请人： CANON KK
发明人： BLENNERHASSETT MICHAEL JOHN , FERNANDO CHANDAKA , CHEN YU-LING
IPC分类号： G06T7/60 , G06F17/27
摘要： - 29 DETECTING A GAP BETWEEN TEXT COLUMNS FROM TEXT LINE A method (300; 400) determines a gap (812) between text columns (816,818) in an image (810). The method forms (330,340;430,440) text line fragments (920) byjoining text connected components (820,821) in the image based on interconnection features (320;420) between neighbouring text connected components of the plurality of text connected components. The method forms (350;450) a plurality of connections between the plurality of anchor points, and identifies (510) a region (1612) enclosed by three of the plurality of connections, each vertex of the identified enclosed region being located at a distinct text line fragment. The gap between text columns is determined by joining (540) the identified enclosed region with further enclosed regions adjacent to the identified enclosed region, each of the further enclosed regions being enclosed by three of the plurality of connections and each vertex of the further enclosed regions being located at a distinct text line fragment. qdRF;R1R 1 P142R2 qnpri Inrigp 110b 140 120 110a camera Scanner * a:~m~nW& ~g111 Find gaps between text columns Fig. 1

6. 发明专利

AU2011253930A1 Document image line detector using tiles and projection 未知
公开(公告)号：AU2011253930A1
公开(公告)日：2013-06-27
申请号：AU2011253930
申请日：2011-12-09
申请人： CANON KK
发明人： MASON TIMOTHY STEPHEN , CHEN YU-LING
IPC分类号： G06T7/60 , H04N1/387 , H04N1/40
摘要： DOCUMENT IMAGE LINE DETECTOR USING TILES AND PROJECTION Disclosed is a method (200) of detecting a line in a digital image (111). The digital image 5 is processed to form connected components for adjacently located pixels of similar colour. , The method forms (230) a tiled line candidate bitmap (183) of the digital image using line candidates, the line candidates being at least one of the connected components (181) selected according to geometric properties of the at least one connected component. A line segment is detected (235) in each tile of the tiled line candidate bitmap, the line segment 10 (187) passing a reference point (930) corresponding to the peak formed from a projection profile (186,802,803) of the tile with a measure (250) being determined by a polar transform (1001) of the tile about the reference point. The method forms (260) line based on the reference point and the measure of line segments for at least two adjacent tiles. 5816796_1 P015747_speci_lodge X -1000 0 -* 100 0 ->1001 r 0 -+0 1002 1003 0 >1005 Fig. 10 5816784 1 P015747 fias lodae

7. 发明专利

AU2007249098B2 Method of multi-level decomposition for colour document layout analysis 未知
公开(公告)号：AU2007249098B2
公开(公告)日：2010-03-04
申请号：AU2007249098
申请日：2007-12-18
申请人： CANON KK
发明人： CHEN YU-LING , IRRGANG STEVEN RICHARD
IPC分类号： G06T15/70 , G06F15/16
摘要： BLOCK-BASED NOISE DETECTION AND REDUCTION METHOD WITH PIXEL LEVEL CLASSIFICATION GRANULARITY A method of detecting noise in an image (1900, 2000) of a compound document is disclosed. The image comprising pixels representing at least text data (1910,1930, 2010) and image data (1920, 2020) used to form the compound document. The noise comprises at least one of halftone, bleeding and texture noise. The method partitions (120) the image 10 into a plurality of tiles (Fig. 11) each formed of a plurality of pixels and determines (140) a set of dominant colours for each said tile and associating each pixel with one of the determined dominant colours. The method then determines (1210) for each dominant colour a fragmentation statistic (1210, Fig. 13); and applies (1220) a threshold (NoiseCnt, NoSolid, NoiseType) to each said fragmentation statistic to detect the at least one of 15 halftone, bleeding and texture noise in the corresponding dominant colour in the tile. The method may be extended to reduce detected noise in the image by processing the colours of each said tile by (a) merging each of the colours with noise to one said colour without noise if the noise is halftone noise or texture noise; and (b) removing the colours with noise if the noise is bleeding noise. The pixels of the tile are then quantised to those 20 remaining dominant colours of said set. 1064822_1 831907_speci02

8. 发明专利

AU770051B2 Entropy coding 未知
公开(公告)号：AU770051B2
公开(公告)日：2004-02-12
申请号：AU8937401
申请日：2001-11-12
申请人： CANON KK
发明人： CHEN YU-LING
IPC分类号： H03M7/30 , H04N7/30

9. 发明专利

AU757618B2 Alpha-channel compositing system 未知
公开(公告)号：AU757618B2
公开(公告)日：2003-02-27
申请号：AU1838901
申请日：2001-02-09
申请人： CANON KK
发明人： CHEN YU-LING
IPC分类号： G06T11/00

10. 发明专利

AT501487T 未知
公开(公告)号：AT501487T
公开(公告)日：2011-03-15
申请号：AT05818582
申请日：2005-12-20
申请人： CANON KK
发明人： ANDREW JAMES , BESLEY JAMES , IRRGANG STEVEN , CHEN YU-LING , CHONG ERIC , LAWTHER MICHAEL , WARK TIMOTHY
IPC分类号： G06K9/34 , G06T7/00
摘要： A method (100), an apparatus, and a computer program product for automatically producing a compact representation of a colour document are disclosed. In the method, a digital image of a colour-document page is segmented (110) into connected components in one-pass, block raster order. The digital image of the page is partitioned into foreground and background images using layout analysis (120) based on compact, connected-component statistics of the whole page. At least one portion of the background image where at least one portion of the foreground image obscures the background image is inpainting (520) in one-pass block raster order. The foreground and background images are combined (130) to form a compact document. A method, an apparatus, and a computer program product for segmenting a digital image comprising a plurality of pixels are also disclosed.

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