# US 5,347,589 A · System and method for displaying handwriting parameters for handwriting verification

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- Number: US 5,347,589 A
- Document ID: US5347589A
- Status: Granted
- Kind: A
- Application number: 08/080,680
- Filed: 1993-06-22
- Granted: 1994-09-13
- Earliest claimed: 1991-10-28
- Assignees: Meeks Associates, Inc.
- Inventors: M. Littleton Meeks; Theodore T. Kuklinski
- Web page: https://patentgrep.com/patent/US5347589A

## CPC

- G06V 40/30: Writer recognition; Reading and verifying signatures
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING

## Abstract

A system and method of displaying handwriting parameters in which a dynamic parameter, such as the tangential speed, of a stylus moving across a surface is determined, a trace of the stylus across the surface is recorded on a record member, and the dynamic parameter is represented on the record member to provide a means of visually observing both the handwriting itself and one or more dynamic parameters of the handwriting process.

## Claims

### Claim 1

A method of displaying handwriting and handwriting parameters from movement of a stylus across a surface, comprising:
resolving the tangential speed of the stylus tip as it moves along a trace across the surface;
recording on a record member the stylus trace as a thin line; and
recording an envelope, which is visually distinguishable from the thin line, on the record member along and about the thin line, in which the width of the envelope is modulated in proportion to the stylus tangential speed to visually indicate the stylus tangential speed, for displaying both the handwriting and the stylus tangential speed.

### Claim 2 (depends on 1)

The method of claim 1 in which the record member includes a printer.

### Claim 3 (depends on 1)

The method of claim 1 further including determining the pressure of the stylus on the surface.

### Claim 4 (depends on 3)

The method of claim 3 further including recording on the record member, along the thin line, a representation of the pressure of the stylus tip as it moves along the trace across the surface.

### Claim 5 (depends on 4)

The method of claim 4 in which recording the representation of the pressure includes assigning display colors to represent pressure values.

### Claim 6 (depends on 4)

The method of claim 4 in which recording the pressure includes assigning display gray shades to represent pressure values.

### Claim 7 (depends on 1)

The method of claim 1 further including determining the location and duration of pauses of the stylus as it moves across the surface.

### Claim 8 (depends on 7)

The method of claim 7 further including recording the pauses on the record member.

### Claim 9 (depends on 8)

The method of claim 8 in which recording the pauses on the record member includes displaying a symmetric pattern around the pause locations.

### Claim 10 (depends on 9)

The method of claim 9 in which displaying a symmetric pattern includes representing the pause duration with the size of the symmetric pattern.

### Claim 11 (depends on 9)

The method of claim 9 in which the symmetric pattern is a circle.

### Claim 12 (depends on 1)

The method of claim 1 further including determining the motion of the stylus just above the surface.

### Claim 13 (depends on 12)

The method of claim 12 further including recording on the record member the motion of the stylus just above the surface.

### Claim 14 (depends on 1)

The method of claim 1 further including determining the tilt of the stylus in relation to the surface.

### Claim 15 (depends on 1)

The method of claim 1 further including outlining the envelope to indicate stylus direction in overlapping envelope areas.

### Claim 16 (depends on 1)

The method of claim 1 further including recording on the record member as a second thin line a previous stylus trace, and a second envelope which is visually distinguishable from the second thin line along and about the second thin line, in which the width of the second envelope has been modulated in proportion to the stylus tip tangential speed along the previous stylus trace to visually indicate the previous stylus trace and the stylus tip tangential speed, to allow visual comparison of two handwriting samples.

### Claim 17 (depends on 1)

The method of claim 1 in which the record member includes a video display device.

### Claim 18

A system for displaying handwriting and handwriting parameters from movement of a stylus across a surface, comprising:
means for resolving the tangential speed of the stylus tip as it moves along a trace across the surface;
means for recording on a record member the stylus trace as a thin line; and
means for recording an envelope, which is visually distinguishable from the thin line, on the record member along and about the thin line, in which the width of the envelope is modulated in proportion to the stylus tangential speed, for displaying both the handwriting and the stylus tangential speed.

### Claim 19 (depends on 18)

The system of claim 18 in which the record member includes a printer.

### Claim 20 (depends on 18)

The system of claim 18 further including means for determining the pressure of the stylus on the surface.

### Claim 21 (depends on 20)

The system of claim 20 further including means for recording on the record member along the thin line a representation of the pressure of the stylus tip as it moves along the trace across the surface.

### Claim 22 (depends on 21)

The system of claim 21 in which said means for recording the pressure includes means for assigning display colors to represent pressure values.

### Claim 23 (depends on 21)

The system of claim 21 in which said means for recording the pressure includes means for assigning display gray shades to represent pressure values.

### Claim 24 (depends on 18)

The system of claim 18 further including means for determining the location and duration of pauses of the stylus as it moves across the surface.

### Claim 25 (depends on 24)

The system of claim 24 further including means for recording the pauses on the record member.

### Claim 26 (depends on 25)

The system of claim 25 in which said means for recording the pauses on the record member includes means for displaying a symmetric pattern around the pause locations.

### Claim 27 (depends on 26)

The system of claim 26 in which said means for displaying a symmetric pattern includes means for representing the pause duration with the size of the symmetric pattern.

### Claim 28 (depends on 26)

The system of claim 26 in which the symmetric pattern is a circle.

### Claim 29 (depends on 18)

The system of claim 18 further including means for determining the direction of motion of the stylus just above the surface.

### Claim 30 (depends on 29)

The system of claim 29 further including means for recording on the record member the direction of motion of the stylus just above the surface.

### Claim 31 (depends on 18)

The system of claim 18 further including means for determining the tilt of the stylus in relation to the surface.

### Claim 32 (depends on 18)

The system of claim 18 further including means for outlining the envelope to indicate stylus direction in overlapping envelope areas.

### Claim 33 (depends on 18)

The system of claim 18 further including means for recording on the record member as a second thin line a previous stylus trace, and a second envelope which is visually distinguishable from the second thin line along and about the second thin line, in which the width of the second envelope has been modulated in proportion to the stylus tip tangential speed along the previous stylus trace to visually indicate the previous stylus trace and the stylus tip tangential speed, to allow visual comparison of two handwriting samples.

### Claim 34 (depends on 18)

The system of claim 18 in which the record member includes a video display device.