Letter identification is not scale invariant!

Najib Majaj, Peri Kurshan, Denis Pelli

Research output: Contribution to journalArticle

Abstract

Using critical-band masking, we characterized the channels mediating identification of letters in several fonts and alphabets (Bookman, Künstler, Sloan, and Chinese) over a wide range of size (0.07 to 10 deg). Line frequency is the average number of lines crossed by a rule through a letter, divided by the letter size. We expected channel frequency to be proportional to line frequency, but instead we find that it grows as only the 2/3 power of line frequency. Furthermore, the efficiency of letter identification in noise rises and falls as a function of line frequency, consistent with a simple model of the effect of the mismatch between channel and line frequency.

Original languageEnglish (US)
Pages (from-to)S639
JournalInvestigative Ophthalmology and Visual Science
Volume38
Issue number4
StatePublished - Dec 1 1997
Externally publishedYes

Fingerprint

Noise

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Letter identification is not scale invariant! / Majaj, Najib; Kurshan, Peri; Pelli, Denis.

In: Investigative Ophthalmology and Visual Science, Vol. 38, No. 4, 01.12.1997, p. S639.

Research output: Contribution to journalArticle

@article{d3af3ed13b7b424b9f23e3679f5bdb61,
title = "Letter identification is not scale invariant!",
abstract = "Using critical-band masking, we characterized the channels mediating identification of letters in several fonts and alphabets (Bookman, K{\"u}nstler, Sloan, and Chinese) over a wide range of size (0.07 to 10 deg). Line frequency is the average number of lines crossed by a rule through a letter, divided by the letter size. We expected channel frequency to be proportional to line frequency, but instead we find that it grows as only the 2/3 power of line frequency. Furthermore, the efficiency of letter identification in noise rises and falls as a function of line frequency, consistent with a simple model of the effect of the mismatch between channel and line frequency.",
author = "Najib Majaj and Peri Kurshan and Denis Pelli",
year = "1997",
month = "12",
day = "1",
language = "English (US)",
volume = "38",
pages = "S639",
journal = "Investigative Ophthalmology and Visual Science",
issn = "0146-0404",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "4",

}

TY - JOUR

T1 - Letter identification is not scale invariant!

AU - Majaj, Najib

AU - Kurshan, Peri

AU - Pelli, Denis

PY - 1997/12/1

Y1 - 1997/12/1

N2 - Using critical-band masking, we characterized the channels mediating identification of letters in several fonts and alphabets (Bookman, Künstler, Sloan, and Chinese) over a wide range of size (0.07 to 10 deg). Line frequency is the average number of lines crossed by a rule through a letter, divided by the letter size. We expected channel frequency to be proportional to line frequency, but instead we find that it grows as only the 2/3 power of line frequency. Furthermore, the efficiency of letter identification in noise rises and falls as a function of line frequency, consistent with a simple model of the effect of the mismatch between channel and line frequency.

AB - Using critical-band masking, we characterized the channels mediating identification of letters in several fonts and alphabets (Bookman, Künstler, Sloan, and Chinese) over a wide range of size (0.07 to 10 deg). Line frequency is the average number of lines crossed by a rule through a letter, divided by the letter size. We expected channel frequency to be proportional to line frequency, but instead we find that it grows as only the 2/3 power of line frequency. Furthermore, the efficiency of letter identification in noise rises and falls as a function of line frequency, consistent with a simple model of the effect of the mismatch between channel and line frequency.

UR - http://www.scopus.com/inward/record.url?scp=33749208801&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33749208801&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33749208801

VL - 38

SP - S639

JO - Investigative Ophthalmology and Visual Science

JF - Investigative Ophthalmology and Visual Science

SN - 0146-0404

IS - 4

ER -