WO2002031753A1 - Character entry apparatus based on character recognition in the video signal - Google Patents
Character entry apparatus based on character recognition in the video signal Download PDFInfo
- Publication number
- WO2002031753A1 WO2002031753A1 PCT/TR2001/000054 TR0100054W WO0231753A1 WO 2002031753 A1 WO2002031753 A1 WO 2002031753A1 TR 0100054 W TR0100054 W TR 0100054W WO 0231753 A1 WO0231753 A1 WO 0231753A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- characters
- computer
- character
- camera
- video signal
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
- G06V30/10—Character recognition
- G06V30/14—Image acquisition
- G06V30/142—Image acquisition using hand-held instruments; Constructional details of the instruments
- G06V30/1423—Image acquisition using hand-held instruments; Constructional details of the instruments the instrument generating sequences of position coordinates corresponding to handwriting
Definitions
- the computer vision based apparatus is invented to enter text, numbers, ' and characters to computers, personal digital assistants, pagers, computerized systems, and other devices having digital signal processors or microprocessors.
- the user draws a character using his or her fmger or a tip pointer or a laser pointer.
- the drawing action of the user are captured by a camera connected to the computer.
- Video signal generated by the camera is analyzed by using computer vision techniques and hand drawn characters are recognized in real- time.
- the computer vision based character entry apparatus does neither need an antenna nor a cable to enter characters as the communicatip ⁇ between the user and the .computer is made possible . b the camera..
- the camera connected to the computer or computerized system may generate analog or digital video.
- a red laser pointer is used for drawing a character on a flat non-reflective surface which is in the viewing area of the camera.
- the beam of the laser pointer produces a maximum in the red component of the image I 0 (if a white light source is used to draw a character then a maximum occurs in the gray level image component).
- the detection of the beam of the laser pointer is equivalent to finding the maximum valued pixel(s) of the image.
- Characters can be simply drawn by a finger or an ordinary pointer on a paper, on a fabric or a board or on the air as well.
- Detection of the tip of the finger can be carried out by estimating the edges of the finger using one of the algorithms described in the article "Finger tracking as an input device for augmented reality," by J. Crowley, F. Berard and J. Coutaz in Proceedings of International Workshop on Automatic Face and Gesture Recognition, pp.
- Characters that can be entered to a computer or a computerized system using our apparatus are members of the characters described by 8-bit ASCII or 16-bit Unicode or the single stroke alphabets used in personal digital assistants (pda).
- the user can also define other special characters which can be used as x bookmarks.
- the characters that our text entry device recognizes are not the characters of a sign language used by deaf people.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Human Computer Interaction (AREA)
- Character Discrimination (AREA)
- Telephone Function (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002214528A AU2002214528A1 (en) | 2000-10-10 | 2001-10-05 | Character entry apparatus based on character recognition in the video signal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR2000/02943 | 2000-10-10 | ||
TR2000/02943A TR200002943A2 (en) | 2000-10-10 | 2000-10-10 | Data input device based on character recognition from video signal |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002031753A1 true WO2002031753A1 (en) | 2002-04-18 |
Family
ID=21622727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/TR2001/000054 WO2002031753A1 (en) | 2000-10-10 | 2001-10-05 | Character entry apparatus based on character recognition in the video signal |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2002214528A1 (en) |
TR (1) | TR200002943A2 (en) |
WO (1) | WO2002031753A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012021220A1 (en) | 2012-10-27 | 2014-04-30 | Volkswagen Aktiengesellschaft | Operating arrangement for detection of gestures in motor vehicle, has gesture detection sensor for detecting gestures and for passing on gesture signals, and processing unit for processing gesture signals and for outputting result signals |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999039302A1 (en) * | 1998-01-28 | 1999-08-05 | California Institute Of Technology | Camera-based handwriting tracking |
US5945981A (en) * | 1993-11-17 | 1999-08-31 | Microsoft Corporation | Wireless input device, for use with a computer, employing a movable light-emitting element and a stationary light-receiving element |
US6044165A (en) * | 1995-06-15 | 2000-03-28 | California Institute Of Technology | Apparatus and method for tracking handwriting from visual input |
EP1087327A2 (en) * | 1999-09-21 | 2001-03-28 | Seiko Epson Corporation | Interactive display presentation system |
-
2000
- 2000-10-10 TR TR2000/02943A patent/TR200002943A2/en unknown
-
2001
- 2001-10-05 WO PCT/TR2001/000054 patent/WO2002031753A1/en active Application Filing
- 2001-10-05 AU AU2002214528A patent/AU2002214528A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5945981A (en) * | 1993-11-17 | 1999-08-31 | Microsoft Corporation | Wireless input device, for use with a computer, employing a movable light-emitting element and a stationary light-receiving element |
US6044165A (en) * | 1995-06-15 | 2000-03-28 | California Institute Of Technology | Apparatus and method for tracking handwriting from visual input |
WO1999039302A1 (en) * | 1998-01-28 | 1999-08-05 | California Institute Of Technology | Camera-based handwriting tracking |
EP1087327A2 (en) * | 1999-09-21 | 2001-03-28 | Seiko Epson Corporation | Interactive display presentation system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012021220A1 (en) | 2012-10-27 | 2014-04-30 | Volkswagen Aktiengesellschaft | Operating arrangement for detection of gestures in motor vehicle, has gesture detection sensor for detecting gestures and for passing on gesture signals, and processing unit for processing gesture signals and for outputting result signals |
Also Published As
Publication number | Publication date |
---|---|
AU2002214528A1 (en) | 2002-04-22 |
TR200002943A2 (en) | 2002-05-21 |
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