Hung Dow Huang

US Patent:

6496600, Dec 17, 2002

Filed:

Jun 17, 1996

Appl. No.:

08/664575

Inventors:

Hung Khei Huang - Lake Forest CA

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06K 900

US Classification:

382187, 382190

Abstract:

An optical character recognition system identifies a font type for an image of a block of text. Key characters matching characters in a pre-defined character set are located in the text block. The image of the text block is partitioned into plural image segments where, for example, each image segment is an image of one line of text. Each image segment is evaluated to determine whether the characters in the image segment have fixed pitch or variable pitch. For each key character in the image segments designated as variable pitch, a determination is made whether a gap exists between a left edge of the key character image and the left border of the key character. A font type is identified for the characters in the image data based on the fixed pitch determinations and the gap determinations.

US Patent:

7171442, Jan 30, 2007

Filed:

Sep 18, 2000

Appl. No.:

09/664550

Inventors:

Hung Huang - Tustin CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06F 15/16

US Classification:

709203, 709205, 709220, 358 18

Abstract:

Supporting printer maintenance in a network environment having a server, at least one network device and a printer, the server containing a plurality of printer configuration files, wherein the printer maintenance is supported by accessing one of the printer configuration files which corresponds to the printer, the configuration file including a plurality of printer maintenance function names and a plurality of printer maintenance commands corresponding to the printer maintenance function names, generating an HTML-based page corresponding to the printer, the HTML-based page containing each of the printer maintenance function names from the accessed printer configuration file, and sending the HTML-based page to the network device, wherein, upon selection in the network device of one of the printer maintenance function names in the HTML-based page, the server sends to the printer the printer maintenance command which corresponds to the selected printer maintenance function name.

US Patent:

7478124, Jan 13, 2009

Filed:

Jul 19, 2006

Appl. No.:

11/488778

Inventors:

Hung Huang - Tustin CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06F 15/16

US Classification:

709203, 709205, 709220, 358 18

Abstract:

Supporting printer maintenance in a network environment having a server, at least one network device and a printer, the server containing a plurality of printer configuration files, wherein the printer maintenance is supported by accessing one of the printer configuration files which corresponds to the printer, the configuration file including a plurality of printer maintenance function names and a plurality of printer maintenance commands corresponding to the printer maintenance function names, generating an HTML-based page corresponding to the printer, the HTML-based page containing each of the printer maintenance function names from the accessed printer configuration file, and sending the HTML-based page to the network device, wherein, upon selection in the network device of one of the printer maintenance function names in the HTML-based page, the server sends to the printer the printer maintenance command which corresponds to the selected printer maintenance function name.

US Patent:

7636757, Dec 22, 2009

Filed:

Dec 15, 2000

Appl. No.:

09/736240

Inventors:

Devon James Kemp - Laguna Hills CA, US
Donald Parke Gibson - Yorba Linda CA, US
Hung Huang - Tustin CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06F 15/16
G06F 3/12

US Classification:

709208, 358 115

Abstract:

Printing over the Internet by a print driver, accessible by at least one application program, so as to output print data for transmission over the Internet, by receiving a print request from an application program to print over the Internet, rendering print data to be transmitted over the Internet into a printing definition language, and packaging the rendered print data with a protocol for transmission over the Internet. The print driver further obtains service provider information, the service provider information representing at least one destination for which the print data can be transmitted to over the Internet. A graphical user interface may provide an interface for obtaining user information and service provider information.

US Patent:

7972018, Jul 5, 2011

Filed:

Feb 25, 2009

Appl. No.:

12/392473

Inventors:

Seyed Behzad Sajadi - Irvine CA, US
Yasuhiro Komori - Irvine CA, US
Hung Khei Huang - Irvine CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G03B 3/00
H04N 3/26

US Classification:

353101, 353 76, 348745, 2502012

Abstract:

Focus adjustment for a projector which includes a projection lens having an adjustable focus position. An asymmetrically focused pattern is projected through the projection lens onto a projection screen, wherein the asymmetrically focused pattern is imaged by the projection lens onto the projection screen with a focus at one portion on the screen that differs with focus at another portion thereof. An image of the asymmetrically focused pattern is captured from the projection screen. A focus adjustment direction is calculated by using asymmetrical aspects of the captured image of the asymmetrically focused pattern. The focus position of the projection lens is driven in the calculated focus adjustment direction so as to move from an out-of-focus state of the projection lens toward an in-focus state.

US Patent:

7973967, Jul 5, 2011

Filed:

Nov 16, 2006

Appl. No.:

11/560715

Inventors:

Hung Huang - Irvine CA, US
Loren Wood - Lakewood CA, US
Charles Armstrong - Irvine CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G06F 15/00
G06K 1/00
G06K 15/00

US Classification:

358 19, 358 21, 358 113, 358 115

Abstract:

A method is provided for allowing a single threaded filter in a print driver to execute feature commands in a parallel mode, thereby creating a pseudo-multithreaded infrastructure which decreases overall processing latency for a print job. The method includes getting and parsing a document sequence print ticket for a document sequence for the print job; creating a feature command list of document sequence scoped feature commands based on the document sequence print ticket; getting a document part and parsing a document print ticket for the document part; inserting document scoped feature commands, based on the document print ticket, in the front of the feature command list; getting a page part and parsing a page print ticket for the page part; inserting page scoped feature commands, based on the page print ticket, in the front of the feature command list; and sequentially executing the feature commands in the feature command list.

US Patent:

8393740, Mar 12, 2013

Filed:

Mar 12, 2009

Appl. No.:

12/403316

Inventors:

Seyed Behzad Sajadi - Irvine CA, US
Yasuhiro Komori - Irvine CA, US
Hung Khei Huang - Irvine CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G03B 21/00

US Classification:

353 70, 353 69, 353 20

Abstract:

Keystone correction for a projector. An uncorrected graphic is displayed on a display unit utilizing pixels. The uncorrected graphic is projected from the display unit onto a projection screen to form an uncorrected image. An orientation of the uncorrected image relative to the projection screen is captured. The uncorrected graphic is transformed into a pre-distorted graphic for projection from the display unit onto the projection screen so as to form a corrected image with an orientation more aligned with the projection screen than the orientation of the uncorrected image and such that the pre-distorted graphic utilizes more pixels in the display unit than a second pre-distorted graphic, wherein if formed, would be formed by transforming the uncorrected graphic such that the second pre-distorted graphic forms a second corrected image with a maximum rectangular area inside the uncorrected image when projected from the display unit onto the projection screen.

US Patent:

8439504, May 14, 2013

Filed:

Mar 2, 2010

Appl. No.:

12/716248

Inventors:

Sangwon Chae - Irvine CA, US
Hung Khei Huang - Irvine CA, US
Yasuhiro Komori - Irvine CA, US

Assignee:

Canon Kabushiki Kaisha - Tokyo

International Classification:

G03B 21/26
G03B 21/14

US Classification:

353 30, 353 48, 353 69

Abstract:

Control of a multiprojector system having multiple projectors arranged in a projector array. It is determined whether the projector array is positioned to form one object or two or more objects. A first keystone correction mode is selected if it is determined that the projector array is positioned to form one object. A second keystone correction mode is selected if it is determined that the projector array is positioned to form two or more objects. In the first keystone correction mode, a homography transformation for each of the projectors is derived so as to accommodate keystone correction of all projectors in the projector array involved in the projection of the single object. In the second keystone correction mode, a homography transformation for each of the projectors is derived so as to accommodate keystone correction of all projectors involved in the projection of each object.