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 Title: |
US5159668:
Method and apparatus for manipulating outlines in improving digital typeface on raster output devices
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Kaasila, Sampo; Cupertino, CA
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| Assignee: |
Apple Computer, Inc., Cupertino, CA
other patents from APPLE COMPUTER, INC. (32940) (approx. 1,718)
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| Published / Filed: |
1992-10-27
/ 1989-05-08
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| Application Number: |
US1989000348703
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| IPC Code: |
Advanced:
G06F 17/21;
G06K 15/12;
G06T 3/40;
G06T 11/20;
G09G 5/26;
Core:
more...
IPC-7:
G06F 15/72;
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| ECLA Code: |
G06T3/40B; G06K15/12G; S06K215/00B4D4; S06K215/00B6;
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| U.S. Class: |
Current:
345/469;
Original:
395/151;
395/150;
340/747;
340/750;
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| Field of Search: |
364/518,521,522
340/721,734,747,728,706
395/141,142,143,139,150,151
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| Priority Number: |
| 1989-05-08 |
US1989000348703 |
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| Abstract: |
In a computer system with a raster output device, a method for manipulating the outlines of a symbol image at various sizes such that the outline defines a close representation of the symbol image. A plurality of control points which correspond to an outline of the symbol image are stored in a memory of the computer system. The size of the symbol image which is to be output on the raster device is determined. The computer system then determines, given the size of the symbol image, whether the control points of the outline of the symbol must be adjusted in order to provide a proper display of the symbol. If adjustment is warranted, at least one of the control points for the outline is selected. The selected control points are then displaced by a predetermined amount to form a new outline of the symbol image. This adjusted outline is then stored in the computer system's memory and may be output in the raster device. The rearrangement of the outline of the symbol provides for a more uniform visual display of the symbol regardless of its size.
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| Attorney, Agent or Firm: |
Blakely, Sokoloff, Taylor & Zafman ;
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| Primary / Asst. Examiners: |
Harkcom, Gary V.; Nguyen, Phu K.
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
Show 4 known family members
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First Claim:
Show all 12 claims |
What is claimed is:
1. A method for manipulating the outline of a symbol image at a plurality of output sizes for improving the display of a digital typeface on raster output device having an output resolution and having an array of pixels, comprising the steps of:
- storing in a first memory means a plurality of control points corresponding to an outline of said symbol image, at least one of said control points having predetermined information specifying different positions of said at least one of said control points for at least two of said plurality of output sizes;
- selecting at least one of said control points of said outline which requires manipulation;
- selecting a first size from said plurality of output sizes to display said outline at said first size on said raster output device;
- calculating a distance and direction for repositioning said selected control point at said first size and said output resolution;
- manipulating said outline by using the distance and direction calculated for said selected control point to reposition said selected control point; and
- storing the results of said outline manipulation in a second memory means.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 23 U.S. patent(s) that reference this one
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