Jian Ping Zhao

US Patent:

7937588, May 3, 2011

Filed:

Jan 6, 2005

Appl. No.:

10/585396

Inventors:

Justin Picard - Cologre, DE
Jian Zhao - North Attleboro MA, US

Assignee:

Thomson Licensing - Boulogne-Billancourt

International Classification:

H04L 9/00

US Classification:

713176, 726 26, 726 32

Abstract:

Improved techniques for making copy detection patterns and using them to detect copying relationships between digital representations. The techniques include techniques for including a message in a copy detection pattern without altering the copy detection patterns entropy and reading the message, techniques for using a copy detection pattern on an analog form to determine whether the analog form is an original analog form without reference to a digital representation of the original of the analog form's copy detection pattern, techniques for increasing the sensitivity of copy detection using copy detection patterns by modifying one of two copy detection patterns that are being compared to take into account alterations resulting from the copying process, techniques for distributing a copy detection pattern across a document, and techniques for using the entropy of a copy detection pattern to locate the copy detection pattern. Also disclosed are applications of copy detection patterns with copying that involves transformations between the digital and analog forms and with digital-to-digital copying.

US Patent:

20050245620, Nov 3, 2005

Filed:

Nov 13, 2003

Appl. No.:

10/534685

Inventors:

Yanlong Shi - Littleton MA, US
Jian Zhao - Boston MA, US

International Classification:

C07C027/06

US Classification:

518716000

Abstract:

Startup of autothermal reformers for hydrogen production in simplified by providing a first, ATR catalyst bed () containing a low-temperature-lightoff catalyst and a second catalyst in a second bed (), or in a second part of the first bed (), which is a better steam reforming catalyst. The combination is an effective solution for the startup needs of small or mobile steam reformers.

US Patent:

20060204412, Sep 14, 2006

Filed:

Dec 22, 2005

Appl. No.:

11/318250

Inventors:

Vincent Rizzo - Norfolk MA, US
Druva Dattatraya - Medford MA, US
Brian Bowers - Cambridge MA, US
Michael Ruffo - Medford CA, US
Jian Zhao - Belmont MA, US

International Classification:

B01J 19/00
C01B 3/26
G05B 1/00

US Classification:

422198000, 423652000, 422105000

Abstract:

This invention relates to methods of water and steam management during fuel reforming, as well as related fuel reformers.

US Patent:

20090136083, May 28, 2009

Filed:

Sep 9, 2005

Appl. No.:

11/990812

Inventors:

Justin Picard - Cologne, DE
Jian Zhao - North Attleboro MA, US

International Classification:

G06K 9/00

US Classification:

382100

Abstract:

A method and system for watermarking video images by selecting sets of coefficients and enforcing relationships between property values of selected sets of coefficients with a volume of video are described.

US Patent:

20090161908, Jun 25, 2009

Filed:

Sep 21, 2005

Appl. No.:

11/992170

Inventors:

Jian Zhao - North Attleboro MA, US

International Classification:

G06K 9/00
H04N 1/32

US Classification:

382100, 283113

Abstract:

Techniques for making and using recoverable marks for films. The recoverable mark consists of a portion of a film to which a watermark that is imperceptible to viewers of the film has been applied and an original mark that is applied to the portion of the film with the watermark. Application of the original mark to the portion modifies the watermark, and consequently, if the original mark is altered, the modifications to the watermark preserve the original mark. In one application of the technique, the watermark is applied to a digital master of the film, a master analog copy is made from the digital master, and a unique original mark is applied to each of the copies made from the master analog copy.

US Patent:

20090220070, Sep 3, 2009

Filed:

Sep 9, 2005

Appl. No.:

11/990454

Inventors:

Justin Picard - Cologne, DE
Jian Zhao - North Attleboro MA, US

International Classification:

G06K 9/00
H04L 9/28

US Classification:

380 28, 382100

Abstract:

A method and system for watermarking video images including generating a watermark and embedding the generated watermark into video images by enforcing relationships between property values of selected sets of coefficients with a volume of video are described. The watermarks are thereby adaptively embedded in the volume of video.

US Patent:

20090226030, Sep 10, 2009

Filed:

Sep 9, 2005

Appl. No.:

11/990574

Inventors:

Jusitn Picard - Cologne, DE
Jian Zhao - North Attleboro MA, US

International Classification:

G06K 9/00

US Classification:

382100

Abstract:

A method and system for watermarking video images including generating a payload, selecting sets of coefficients, modifying coefficients and embedding said watermark by enforcing relationships between property values of selected sets of coefficients with a volume of video are described. The modified coefficients replace the selected sets of coefficients.

US Patent:

20090252370, Oct 8, 2009

Filed:

Sep 9, 2005

Appl. No.:

11/990805

Inventors:

Justin Picard - Cologne, DE
Jian Zhao - North Attleboro MA, US

International Classification:

G06K 9/00
H04N 7/26

US Classification:

382100, 37524026, 375E07076, 37524025

Abstract:

A method and system for detecting watermarks in video images including preparing a signal, extracting and calculating property values, detecting bit values and decoding a payload, where the payload is a bit sequence generated and embedded by enforcing relationships between property values in a volume of video are described.