Inventor · disambiguated record
Zhigang Fan
Also filed as: FAN ZHIGANG
218 granted patents·19 pending applications·4,145 citations·filing 1989–2023
99Inventor score
Top patents by PatentIndex Score
237 records- 0197US7660460B2Gamut selection in multi-engine systemsXEROX CORP·Filed 2005·Granted Feb 9, 2010·54 cites·22 claims
- 0296US9014432B2License plate character segmentation using likelihood maximizationFAN ZHIGANG·Filed 2012·Granted Apr 21, 2015·58 cites·20 claims
- 0396US5767978AImage segmentation systemXEROX CORP·Filed 1997·Granted Jun 16, 1998·285 cites·12 claims
- 0495US8792682B2Method and system for identifying a license plateFAN ZHIGANG·Filed 2011·Granted Jul 29, 2014·41 cites·16 claims
- 0594US8837830B2Finding text in natural scenesBALA RAJA·Filed 2012·Granted Sep 16, 2014·38 cites·19 claims
- 0694US8774462B2System and method for associating an order with an object in a multiple lane environmentXEROX CORP·Filed 2013·Granted Jul 8, 2014·40 cites·28 claims
- 0794US8699089B2Variable data image watermarking using infrared sequence structures in black separationESCHBACH REINER·Filed 2012·Granted Apr 15, 2014·20 cites·19 claims
- 0894US8699103B2System and method for dynamically generated uniform color objectsMESTHA LALIT K·Filed 2005·Granted Apr 15, 2014·24 cites·11 claims
- 0994US8494304B2Punched hole detection and removalVENABLE DENNIS L·Filed 2007·Granted Jul 23, 2013·41 cites·21 claims
- 1094US8064102B1Embedding frequency modulation infrared watermark in digital documentZHAO YONGHUI·Filed 2010·Granted Nov 22, 2011·29 cites·12 claims
- 1194US7800779B2System and method for image based control using inline sensorsXEROX CORP·Filed 2005·Granted Sep 21, 2010·24 cites·20 claims
- 1293US7324241B2Variable data differential gloss imagesXEROX CORP·Filed 2004·Granted Jan 29, 2008·62 cites·38 claims
- 1392US8462394B2Document type classification for scanned bitmapsFAN ZHIGANG·Filed 2008·Granted Jun 11, 2013·16 cites·19 claims
- 1492US6798539B1Method for moire-free color halftoning using non-orthogonal cluster screensXEROX CORP·Filed 2000·Granted Sep 28, 2004·49 cites·35 claims
- 1591US7532767B2Removing ringing and blocking artifacts from JPEG compressed document imagesXEROX CORP·Filed 2006·Granted May 12, 2009·18 cites·21 claims
- 1691US6985628B2Image type classification using edge featuresXEROX CORP·Filed 2002·Granted Jan 10, 2006·46 cites·20 claims
- 1790US8023156B2Image output color management system and methodXEROX CORP·Filed 2007·Granted Sep 20, 2011·13 cites·20 claims
- 1890US7436977B2Embedding variable watermark information in halftone screensXEROX CORP·Filed 2005·Granted Oct 14, 2008·14 cites·18 claims
- 1990US6954541B2Method of detecting changes occurring in image editing using watermarksXEROX CORP·Filed 2002·Granted Oct 11, 2005·48 cites·21 claims
- 2090US6192155B1Systems and methods for reducing boundary artifacts in hybrid compressionXEROX CORP·Filed 1998·Granted Feb 20, 2001·121 cites·20 claims
- 2189US9137405B2System for creating certified document copiesXEROX CORP·Filed 2013·Granted Sep 15, 2015·11 cites·29 claims
- 2289US7684084B2Multiple dimensional color conversion to minimize interpolation errorXEROX CORP·Filed 2007·Granted Mar 23, 2010·12 cites·19 claims
- 2388US9100576B2Camera positioning tool for symbology readingFAN ZHIGANG·Filed 2012·Granted Aug 4, 2015·8 cites·19 claims
- 2488US8352856B2Systems and methods to resize document contentXEROX CORP·Filed 2009·Granted Jan 8, 2013·18 cites·20 claims
- 2588US7864979B2System and method for embedding dispersed miniature security marksXEROX CORP·Filed 2007·Granted Jan 4, 2011·11 cites·20 claims
- 2688US6991260B2Anti-counterfeiting see-through security feature using line patternsXEROX CORP·Filed 2002·Granted Jan 31, 2006·21 cites·9 claims
- 2788US5495538ASegmentation-based JPEG image artifacts reductionXEROX CORP·Filed 1995·Granted Feb 27, 1996·112 cites·21 claims
- 2888US5339170AImage processing system and method employing hybrid filtering to provide improved reconstruction of continuous tone images from halftone screen-structured imagesXEROX CORP·Filed 1991·Granted Aug 16, 1994·88 cites·5 claims
- 2987US9760789B2Robust cropping of license plate imagesBURRY AARON MICHAEL·Filed 2012·Granted Sep 12, 2017·10 cites·10 claims
- 3087US7969624B2Method and system for identifying optimal media for calibration and controlXEROX CORP·Filed 2006·Granted Jun 28, 2011·10 cites·15 claims
- 3187US7376272B2Method for image segmentation to identify regions with constant foreground colorXEROX CORP·Filed 2004·Granted May 20, 2008·32 cites·15 claims
- 3287US5359676ADecompression of standard ADCT-compressed document imagesXEROX CORP·Filed 1993·Granted Oct 25, 1994·82 cites·10 claims
- 3386US9471846B2Method and system for visualizing a correlation mark using an electronic deviceXEROX CORP·Filed 2014·Granted Oct 18, 2016·8 cites·29 claims
- 3486US8401230B2Signature based drive-through order tracking system and methodKOZITSKY VLADIMIR·Filed 2010·Granted Mar 19, 2013·16 cites·20 claims
- 3586US6973213B2Background-based image segmentationXEROX CORP·Filed 2001·Granted Dec 6, 2005·44 cites·11 claims
- 3686US5799112AMethod and apparatus for wavelet-based universal halftone image unscreeningXEROX CORP·Filed 1996·Granted Aug 25, 1998·91 cites·28 claims
- 3786US5243444AImage processing system and method with improved reconstruction of continuous tone images from halftone images including those without a screen structureXEROX CORP·Filed 1992·Granted Sep 7, 1993·76 cites·8 claims
- 3885US8550367B2System and method for embedding machine-readable codes in combination with other images such as logosFAN ZHIGANG·Filed 2012·Granted Oct 8, 2013·8 cites·20 claims
- 3985US8265498B2Method and apparatus for determining media thickness in a feeder section of an image production deviceFAN ZHIGANG·Filed 2009·Granted Sep 11, 2012·7 cites·21 claims
- 4085US8056821B2Security marks simulating natural defects for embedding information in documentsFAN ZHIGANG·Filed 2006·Granted Nov 15, 2011·6 cites·24 claims
- 4185US7676058B2System and method for detection of miniature security marksXEROX CORP·Filed 2006·Granted Mar 9, 2010·9 cites·18 claims
- 4285US7382919B2System and method for editing image dataXEROX CORP·Filed 2006·Granted Jun 3, 2008·9 cites·20 claims
- 4385US6844941B1Color halftoning using a single successive-filling halftone screenXEROX CORP·Filed 2000·Granted Jan 18, 2005·28 cites·18 claims
- 4485US6839152B2Adaptive filtering method and apparatus for descreening scanned halftoned image representationsXEROX CORP·Filed 2000·Granted Jan 4, 2005·28 cites·21 claims
- 4584USD806824SElectric stun gunCUTTING EDGE PRODUCTS INC·Filed 2016·Granted Jan 2, 2018·23 cites·1 claims
- 4684US8744132B2Video-based method for detecting parking boundary violationsBULAN ORHAN·Filed 2012·Granted Jun 3, 2014·11 cites·20 claims
- 4784US8682036B2System and method for street-parking-vehicle identification through license plate capturingWANG YAO RONG·Filed 2012·Granted Mar 25, 2014·11 cites·21 claims
- 4884US8520074B2Determining a total number of people in an IR image obtained via an IR imaging systemWANG YAO RONG·Filed 2010·Granted Aug 27, 2013·11 cites·24 claims
- 4984US8373895B2Prevention of unauthorized copying or scanningXEROX CORP·Filed 2008·Granted Feb 12, 2013·8 cites·20 claims
- 5084US8159720B2Color error diffusionFAN ZHIGANG·Filed 2005·Granted Apr 17, 2012·8 cites·20 claims
Showing the top 50 of 237 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Zhigang Fan files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →