Fuhua A Cheng

US Patent:

8648808, Feb 11, 2014

Filed:

Sep 19, 2011

Appl. No.:

13/236362

Inventors:

Fuhua Cheng - Lexington KY, US
Lu Hsien Chang - Taoyuan, TW

Assignee:

Amchael Visual Technology Corp. - Hsinchu

International Classification:

G06F 3/02

US Classification:

345166, 382103, 715863

Abstract:

A three-dimensional (3D) human-computer interaction system that supports mouse operations through the motion of a finger and an operation method thereof are provided. In the provided system and method, a multi-view video recording device captures an image of a finger of an operator, and has an information connection with an electronic information device through an interaction handling program. After the interaction handling program is executed, a CPU of the electronic information device performs operations such as computation, synthesis, image presentation, gesture tracking, and command recognition on the captured image to interpret a motion of the finger of the user. Accordingly, the user may perform operations on an operation interface of the electronic information device by using the finger in a 3D space in a noncontact mode. The present invention is particularly applicable to application software with 3D space operations as it can perform 3D interaction with the application software.

US Patent:

20100289874, Nov 18, 2010

Filed:

May 17, 2010

Appl. No.:

12/781476

Inventors:

FUHUA CHENG - Lexington KY, US

International Classification:

H04N 13/00
G02B 27/14
H04N 13/02

US Classification:

348 43, 359629, 348 49, 348E13074, 348E13001

Abstract:

A system is described for providing a three-dimensional representation of a scene from a single image. The system includes a reflector having a plurality of reflective surfaces for providing an interior reflective area defining a substantially quadrilateral cross section, wherein the reflector reflective surfaces are configured to provide nine views of an image. An imager is included for converting the nine-view image into digital data. Computer systems and computer program products for converting the data into three-dimensional representations of the scene are described.

US Patent:

20110310230, Dec 22, 2011

Filed:

Sep 20, 2010

Appl. No.:

12/885810

Inventors:

FUHUA CHENG - Lexington KY, US

International Classification:

H04N 13/02

US Classification:

348 49, 348E13074

Abstract:

A system for providing a three-dimensional representation from a single image includes a reflector apparatus for providing an image of a scene comprising three adjacent views of the scene. The apparatus defines a left light path, a center light path, and a right light path, wherein each of the left light path and the right light path comprise opposed reflective surfaces for redirecting light, whereby light passing through the left light path, light passing through the right light path, and light passing through the center light path converge at a nodal point of an imager to create an image of the scene providing three adjacent views of the scene arrayed in a three-by-one rectangular grid. A client computing device receives data from the imager and transforms the data into a stereoscopic image or an image-plus-depth rendering, and/or converts or switches back and forth between two-dimensional and three-dimensional images.

US Patent:

20130128005, May 23, 2013

Filed:

Nov 21, 2011

Appl. No.:

13/301293

Inventors:

Fuhua CHENG - Lexington KY, US
Shang Te TU - Hsinchu, TW

Assignee:

AMCHAEL VISUAL TECHNOLOGY CORP. - Hsinchu

International Classification:

H04N 13/02
G03B 35/10

US Classification:

348 49, 396332, 348E13074

Abstract:

A two-parallel-channel reflector (TPCR) with focal length and disparity control is used after being combined with an imaging device. A left parallel channel and a right parallel channel are formed in the TPCR, so that the imaging device can synchronously perform an imaging operation on a left side view and a right side view of a scene, so as to obtain a stereoscopic image. Each parallel channel is bounded by two curved reflecting mirrors, so that captured light rays may be parallelly reflected in the channel, and an operator may adjust a convergence angle and an interocular distance between the left side view and the right side view, so as to control the focal length and disparity during imaging as require.

US Patent:

20130250410, Sep 26, 2013

Filed:

Mar 22, 2012

Appl. No.:

13/427641

Inventors:

Fuhua CHENG - Lexington KY, US

International Classification:

G02B 27/22

US Classification:

359466

Abstract:

A two-parallel-channel reflector (TPCR) with focal length and disparity control is provided. The TPCR is connected to an imaging device, so that an image of a scene is captured to generate a stereoscopic image. The TPCR has two parallel channels that allow the imaging device to generate a left side view image and a right side view image of the shot scene synchronously. Each parallel channel includes an outward reflecting unit and an inward reflecting unit, which are designed to ensure that light rays in the parallel channels are reflected in a collimated and parallel manner. During imaging, a position and an angle of the outward reflecting unit can be adjusted to fulfill the function of controlling the disparity and the focal length.

US Patent:

7200532, Apr 3, 2007

Filed:

Jun 16, 2003

Appl. No.:

10/462297

Inventors:

Fuhua Cheng - Lexington KY, US

Assignee:

University of Kentucky Research Foundation - Lexington KY

International Classification:

G06F 17/10

US Classification:

703 2, 703 1, 703 6, 703 13, 345419, 345420, 345421, 345423

Abstract:

A method for surface modeling of images to produce realistic images or to provide simulations with accurate surface information is provided. More particularly, the present invention relates to a new subdivision depth computation technique and to an improved label-driven adaptive subdivision technique for use in Catmull-Clark subdivision surface modeling systems. The method comprises computing a subdivision depth to determine the number of recursive subdivisions which may be performed on a control mesh to generate a plurality of finer mesh elements while preserving a predetermined error tolerance, and using the computed subdivision depth to construct an adaptively refined mesh that is substantially similar to the control mesh within the predetermined error tolerance. Limit control surfaces with and without extraordinary vertices may be analysed using the method of the invention. In another aspect, a software program for accomplishing the method of the present invention is provided.

US Patent:

20150029100, Jan 29, 2015

Filed:

Jul 23, 2014

Appl. No.:

14/339090

Inventors:

- Lexington KY, US
Fuhua Cheng - Lexington KY, US

International Classification:

G06F 3/0354

US Classification:

345158, 345163

Abstract:

Systems for surface-free pointing and/or command input include a computing device operably linked to an imaging device. The imaging device can be any suitable video recording device including a conventional webcam. At least one pointing/input device is provided including first, second, and third sets of actuable light sources, wherein at least the first and second sets emit differently colored light. The imaging device captures one or more sequential image frames each including a view of a scene including the activated light sources. One or more computer program products calculate a two-dimensional or three-dimensional position and/or a motion and/or an orientation of the pointing/input device in the captured image frames by identifying a two-dimensional or three-dimensional position of the activated light sources of the first, second, and/or third sets of light sources. Certain activation patterns of light sources are mapped to particular pointing and/or input commands.