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patent

Method for producing visually evenly spaced typographic characters

Hersch, R.D.  
•
Bétrisey, C.
2001

Methods are proposed for visually evenly spacing of two successive characters taking into account outline shape modifications induced by character grid-fitting. Visually even spacing of characters is obtained by converting the geometric space between two characters into its visually perceived equivalent space. Converting between geometric and visually perceived spaces requires transformations applied to the character outlines for smoothing out the character borders and replacing them by virtual borders which represent the boundaries of the perceived intercharacter space. The optimal visual distance between the origins of two successive characters is obtained by requiring the characters to have a perceived visual space equal or close to an ideal perceived visual space called ideal optical intercharacter space extracted from by design optimally spaced character pairs such as "nn" for lower-case characters and "HH" for capital letters.

  • Details
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Type
patent
EPO Family ID

21925893

Author(s)
Hersch, R.D.  
Bétrisey, C.
Note

Alternative title(s) : (en) Method for producing contrast-controlled grayscale characters

URL

URL

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=8&f=G&l=50&co1=AND&d=PTXT&s1=5768490&OS=5768490&RS=5768490

URL

http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F5796409
EPFL units
LSP  
DOICountry codeKind codeDate issued

US5796409

US

A

1998-08-18

US5768490

US

A

1998-06-16

Available on Infoscience
January 31, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/240251
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