Multi-directional hand scanner and mouse

• US 5,355,146 A
• Filed: 01/30/1991
• Issued: 10/11/1994
• Est. Priority Date: 03/05/1990
• Status: Expired due to Fees

• Current Assignee: BMC Micro-Industries Limited
• Original Assignee: BMC Micro-Industries Limited
• Inventors: Chiu, Wing-Lim, Chew, Wai-Kwok
• Primary Examiner(s): Weldon, Ulysses
• Assistant Examiner(s): WU, XIAO MIN
• Application Number:
  US07/647,832
• Time in Patent Office: 1,350 Days
• Field of Search: 340/710, 340/709, 340/706, 358/473, 382/58, 382/59, 382/62, 250/221, 235/472, 345/156, 345/157, 345/163, 345/164, 345/165, 345/166, 345/167
• US Class Current: 345/156
• CPC Class Codes: G06F 3/03544 having dual sensing arrangement, e.g. two balls or two coils used to track rotation of the pointing device
• CPC Class Codes: H04N 1/107 with manual scanning

Abstract

A computer system incorporating a combined computer pointing device (mouse) and hand scanner is disclosed. When used as a hand scanner, the device transmits signals representing image data, position information and rotation information to the computer. The computer assembles from the received signals a unified image from possibly non-aligned and overlapping image data and stores the resulting image.

Claims

1. In a system for optically scanning the surface of an object and comprising an optical scanning device for repetitively generating representations of visually perceptible information of a portion of the object, each representation of visually perceptible information comprising a single row of pixel digits, and for each such representation of visually perceptible information for generating representations of movement of said scanning device over the object, said movement representations comprising a first X-direction movement representation, a first Y-direction movement representation, said Y-direction being normal to said X-direction and a representation of second Y-direction movement of a point on said scanning device separate from the point of said first Y-direction movement representation, a method comprising:

determining from said representation of first X-direction movement and said representation of first Y-direction movement a position value;

determining from said representation a first Y-direction movement and said representation of second Y-direction movement a rotation value indicative of scanning device rotation;

determining, from said position value and said rotation value, a storage location in a two-dimensional pixel array for a first of said pixel digits and a last of said pixel digits of the representation of visually perceptible information; and

writing into said two-dimensional pixel array said plurality of pixel digits in an approximation of a straight line between the storage location of the first pixel digit and the storage location of the last pixel digit.

2. The method of claim 1 wherein each of said representations of movement identifies a change of position from the preceding such representation and said position value determining step comprises adding an amount determined from said representation of first X-direction movement to a priorly determined X-position value, and adding an amount determined from said representation of first Y-direction movement to a priorly determined Y-position value.

3. The method of claim 2 wherein said rotation value determining step comprises subtracting said representation of first Y-direction movement from said representation of second Y-direction movement, and adding an amount determined from the result of such subtraction to a priorly determined rotation value.

4. The method of claim 1 wherein each representation of visually perceptible information comprises a fixed number of digits and said writing step comprises:

reducing the number of digits in said representation of visually perceptible information in response to said rotation value; and

writing the reduced number of pixels digits of said representation of visually perceptible information into said two-dimensional pixel array at locations determined from said position value and said rotation value.

5. A system for optically scanning the surface of an object bearing visually perceptible information, capturing the information, and representing it digitally as a two-dimensional pixel representation of an image, said system comprising:

a scanning device that can be positioned adjacent to the surface of an object to be scanned,

said scanning device generating a signal output suitable for conveyance to a digital computer,

said scanning device including an optical scanner that repeatedly scans an adjacent surface portion of such an object, capturing a representation of the visually perceptible information borne by that portion, and presenting the representation to the signal output,

said scanning device being manually positionable over the surface of such an object to capture representations of visually perceptible information from plural adjoining and possible non-aligned and overlapping portions of such an object, and

said scanning device including a mechanism that can interact with such an object to sense and to generate representations of surface translations and rotations of said device with respect to such an object and present these representations to the signal output;

a storage device comprising a plurality of storage locations each representing one pixel of a reproducible two-dimensional representation of a scanned object; and

program means installable upon a computer and responsive to the representations of surface translation and rotation for writing representations of the visually perceptible information received by the computer from the scanning device into the storage device at ones of the plurality of storage locations determined from the representations of surface translation and rotation from said scanning device with respect to such an object to assemble a unitary image within the storage device from separately scanned image representations of adjoining and possible non-aligned and overlapping portions of an object as the scanning device is manually drawn across such an object in a relatively uncontrolled manner.

6. The system of claim 5 wherein said mechanism comprises a first sensing means having a fixed position on said device, for generating first representations of the surface translation of said first sensing means and a second sensing means having a second fixed position on said scanning device, separate from said first fixed position, for generating second representations of surface translation of said second sensing means and for presenting these representations to the signal output;

and

said program means being responsive to said first and said second representations of surface translation for writing said representations of visually perceptible information into said storage means.

7. The system of claim 6 wherein said optical scanner captures rectangular representations of the visually perceptible information, each rectangular representation having a length and a width, and

said first and second fixed positions of said first and second surface translation sensing means are on a line parallel to the length of said rectangular representation.

8. The system of claim 5 wherein said mechanism comprises:

a first movement sensor for generating representations of movement in a first direction and for generating representations of movement in a second direction, normal to the first direction, and a second movement sensor spaced apart from said first movement sensor for generating representations of movement in a direction parallel to said first direction.

9. The system of claim 5 wherein said device comprises a source of equally spaced clock pulses and means responsive to said clock pulses for periodically presenting to the signal output a representation of the visually perceptible information and representations of translation and rotation generated in timed relationship to the transmitted representation of visually perceptible information.

10. The system of claim 5 wherein said optical scanner captures a first representation of visually perceptible information at a first position on said object and captures a second representation of visually perceptible information at a second position on said object, said second position being different from said first position;

said mechanism comprises means for generating representations of the translation and rotation differences between said first and second positions;

said device comprises means for presenting to the signal output, said first representation of visually perceptible information coupled with translation and rotation representations of said first position and for presenting to the signal output and said second representation of visually perceptible information coupled with the representations of the translation and rotation differences between said first and second positions; and

said program means writes said first representation of visually perceptible information into said storage means at a location derived from the translation and rotation representations coupled with said first representation of visually perceptible information and writes said second representation of visually perceptible information into said storage means at locations derived from the translation and rotation differences between said first position and said second position.

11. The system of claim 10 wherein said second representation of visually perceptible information overlaps a portion of said first representation of visually perceptible information;

and

said program means is responsive to the translation and rotation differences between said first and second positions coupled with said second representation of visually perceptible information for replacing a portion of said first representation of visually perceptible information in said storage means with a portion of said second representation of perceptible information.

12. The system of claim 5 wherein the optical scanner comprises a charge coupled device means for capturing representations of visually perceptible information and for generating analog signals representative of the captured representations;

and

means for converting said analog signals into binary signals and for presenting said binary signals to the signal output.

13. The system of claim 12 wherein said means for converting comprises circuit means for converting said analog signals into binary grey scale code signals for presentation to the signal output.

14. The system of claim 12 wherein said device comprises means for illuminating said object;

and

said program means is operative to enable said illuminating means when in the optical scanning mode and to disable said illuminating means when in the mouse pointing mode.

15. The system of claim 5 wherein said mechanism comprises surface translation sensing means for generating first representations of movement of said device in a first direction relative to said device and for generating second representations of movement of said device in a second direction opposite to said first;

and

said program means being responsive to said first representations of movement and said second representations of movement for writing said representations of visually perceptible information into said storage means;

whereby a unitary image can be assembled within the two-dimensional pixel representations from separately scanned image representations of adjoining and possibly nonaligned and overlapping portions of such an object as the device is manually drawn across such an object in both the first and the second directions.

16. The system of claim 5 comprising:

means for comparing representations of visually perceptible information received from said device with at least partially overlapping representations of visually perceptible information previously written into said storage device to identify errors in the translation and rotation representations of said received representations of visually perceptible information; and

said writing means comprises means responsive to translation and rotation errors identified by the comparing means for writing said received representations of visually perceptible information into said storage device at positionally and rotationally corrected locations.

17. The system of claim 16 wherein said comparing means responds to the translation and rotation representations of received visual information representations for selecting portions of said visual information representations stored in said storage device for comparison with the received visual information representations.

18. The system of claim 17 comprising means for buffering said received visual information representations prior to comparison with visual information representation stored in said storage device.

19. The system of claim 18 wherein the storage device stores visual information representations of at least one region of the object and the buffering means stores visual information representations of the same one region;

and

said comparison means compares visual information representations of said one region stored in said storage device with positionally adjusted visual information representations of said one region stored in said buffering means.

20. The system of claim 16 wherein said writing means comprises means for writing said received representations into locations of said storage means occupied by said previously written visually perceptible information.