Apparatus and method of assisting visually impaired persons to generate graphical data in a computer

• US 6,140,913 A
• Filed: 07/20/1998
• Issued: 10/31/2000
• Est. Priority Date: 07/20/1998
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Okada, Yoshihiko, Yamanaka, Katsuhiro
• Primary Examiner(s): POPE, DARYL C
• Application Number:
  US09/118,972
• Time in Patent Office: 834 Days
• Field of Search: 340/407.1, 340/407.2, 340/825.19, 434/112, 434/113, 434/114, 434/115
• US Class Current: 340/407.2
• CPC Class Codes: G09B 21/001 Teaching or communicating with blind persons G09B21/02 - G09B21/06 take precedence
• CPC Class Codes: G09B 21/003 using tactile presentation of the information, e.g. Braille displays

Abstract

In order to assist a visually impaired person to generate digital image data in a computer, a plurality of graph components are provided each of which is tactually recognized by the visually impaired person. A touch graph is generated using the graph components on a plate-like member by the visually impaired person. The touch graph is acquired into a computer using an input interface such as a digital still camera. Subsequently, a computer software analyzes the digital image data so as to define each of the graph components and logical relationship between the graph components. The analyzed digital image data is stored in a memory within the computer.

Claims

1. An apparatus for assisting visually impaired persons to generate graphical data in a computer, comprising:

a plurality of graph components each of which is tactually recognized by a visually impaired person;

a plate-like member on which the graph components are positioned to generate a touch graph;

an input interface for acquiring digital image data of said touch graph into a computer;

an image data analyzer for analyzing said digital image data so as to define each of said graph components and a logical relationship between said graph components; and

a memory for storing the analyzed digital image data.

2. An apparatus as claimed in claim 1, wherein each of said plurality of graph components is detachably secured on said plate-like member.

3. An apparatus as claimed in claim 1, wherein each of said plurality of graph components can be identified by sighted persons.

4. An apparatus as claimed in claim 1, wherein said plate-like member carries an identifier for ascertaining the identity thereof, said identifier being able to be recognized by visually impaired persons, sighted persons, and computers.

5. An apparatus as claimed in claim 3, further comprising:

another input interface for acquiring said identifier carried on said plate-like member into said computer, said identifier being stored in said computer in relation to the analyzed digital image data.

6. An apparatus as claimed in claim 1, further comprising:

a touch screen on which an image of the touch graph is displayed;

an interactive device operatively coupled to said touch screen, said interactive device assisting communication between the visually impaired person and the computer so as to specify the graph components,

wherein the visually impaired person is able to add information in connection with a given graph component by way of the touch screen and the interactive device.

7. An apparatus as claimed in claim 3, wherein the identifying by said sighted persons is based on a unique shape of each of the graph components and not based on knowledge of Braille.

8. An apparatus as claimed in claim 7, wherein one unique shape corresponds to a rectangular shape, another unique shape corresponds to hexagonal shape, and yet another unique shape corresponds to a line with an arrow at one end thereof.

9. An apparatus as claimed in claim 2, wherein each of said plurality of graph components is detachably secured to said plate-like member by way of a magnet.

10. An apparatus as claimed in claim 6, wherein, when the visually impaired person touches the screen at a location corresponding to one of the graph components of said touch graph that are visually displayed on said touch screen, the interactive display provides an audible output as to which the one of the graph components the location corresponds to, and wherein the interactive display includes a keyboard by which the visually impaired person can add information to the one of the graph components.

11. A method of assisting visually impaired persons to generate graphical data in a computer, comprising the steps of:

(a) generating a touch graph using a plurality of graph components on a plate-like member, each of the graph components being tactually recognized by a visually impaired person;

(b) acquiring digital image data of the touch graph into a computer;

(c) analyzing said digital image data so as to define each of said graph components and a logical relationship between said graph components; and

(d) a memory for storing the analyzed digital image data.

12. A method as claimed in claim 11, wherein each of said plurality of graph components is detachably secured on said plate-like member.

13. A method as claimed in claim 11, wherein each of said plurality of graph components can be identified by sighted persons.

14. A method as claimed in claim 11, further comprising:

acquiring an identifier carried on said plate-like member for ascertaining the identity thereof; and

storing said identifier in said computer in relation to the analyzed digital image data.

15. A method as claimed in claim 11, further comprising:

displaying an image of the touch graph on a touch screen;

specifying a given graph component using an interactive device operatively coupled to said touch screen, said interactive device assisting communication between the visually impaired person and the computer so as to specify the graph components; and

allowing the visually impaired person to add information in connection with the given graph component by way of the touch screen and the interactive device.

16. A method as claimed in claim 13, wherein the identifying by said sighted persons is based on a unique shape of each of the graph components and not based on knowledge of Braille.

17. A method as claimed in claim 16, wherein one unique shape corresponds to a rectangular shape, another unique shape corresponds to hexagonal shape, and yet another unique shape corresponds to a line with an arrow at one end thereof.

18. A method as claimed in claim 12, wherein each of said plurality of graph components is detachably secured to said plate-like member by way of a magnet.

19. A method as claimed in claim 15, wherein, when the visually impaired person touches the touch screen at a location corresponding to one of the graph components of said touch graph that are visually displayed on said touch screen, the interactive display provides an audible output as to which the one of the graph components the location corresponds to, and wherein the interactive display includes a keyboard by which the visually impaired person can add information to the one of the graph components.