Topic
ClearType
About: ClearType is a research topic. Over the lifetime, 21 publications have been published within this topic receiving 514 citations.
Papers
1 May 2000
TL;DR: Fourier analysis demonstrates that both the optimization technique and the displaced box filter suppress frequencies that contribute most to color fringing in unfiltered displaced sampling.
Abstract: This paper describes the filtering used in Microsoft ClearType. ClearType is a software system that enhances the resolution and readability of fonts on displays that contain a repeating pattern of addressable colored sub-pixels. The filtering in ClearType is based on a perceptual model of human vision. The perceptual model leads to an optimization technique for finding the best output values. The results of the optimization can be approximated by pre-filtering each color channel of an input image and then sampling each filtered color image at the spatial locations of the same colored sub-pixels in the display. We refer to this filtering followed by displaced sampling as RGB decimation. RGB decimation eliminates the phase error caused by standard anti-aliasing. A further approximation of the optimal filter yields RGB decimation with displaced box filters. Fourier analysis demonstrates that both the optimization technique and the displaced box filter suppress frequencies that contribute most to color fringing in unfiltered displaced sampling.
140 citations
1 May 2000
TL;DR: Fourier analysis demonstrates that both the optimization technique and the displaced box filter suppress frequencies that contribute most to color fringing in unfiltered displaced sampling.
Abstract: This paper describes the filtering used in Microsoft ClearType. ClearType is a software system than enhances the resolution and readability of fonts on displays that contain a repeating pattern of addressable colored sub-pixels. The filtering in ClearType is based on a perceptual model of human vision. The perceptual model leads to an optimization technique for finding the best output values. The results of the optimization can be approximated by pre-filtering each color channel of an input image and then sampling each filtered color image at the spatial locations of the same colored sub-pixels in the display. We refer to this filtering followed by displaced sampling as RGB decimation. RGB decimation eliminates the phase error caused by standard anti-aliasing. A further approximation of the optimal filter yields RGB decimation with displaced box filters. Fourier analysis demonstrates that both the optimization technique and the displaced box filter suppress frequencies that contribute most to color fringing in unfiltered displaced sampling.
96 citations
TL;DR: In this paper, the passages were presented either in a format (ClearType) designed to display smoother, clearer characters on LCD monitors by eliminating pixilation or in standard format (non-ClearType).
Abstract: Subjects read passages of text on a video monitor as their eye movements were recorded. In Experiment 1, the passages were presented either in a format (ClearType) designed to display smoother, clearer characters on LCD monitors by eliminating pixilation or in standard format (non-ClearType). The passages were also presented in three different fonts (Times New Roman, Harrington and Script MT bold) which differed in how easy the letters were to encode. While there were no comprehension differences due to ClearType or font, ClearType led to faster reading, fewer fixations, and shorter fixation durations than non-ClearType. There were also font differences, with Times New Roman leading to faster reading than the other two fonts. In Experiment 2, we replicated the results that ClearType lead to faster reading than non-ClearType when subjects read single sentences with high or low frequency target words. Across both experiments, word frequency interacted with presentation format. Copyright © 2009 John Wiley & Sons, Ltd.
80 citations
22 Apr 2006
TL;DR: Two experiments comparing user performance on ClearType and Regular displays are reported, revealing substantial individual differences in performance suggesting ClearType may not be universally beneficial to information workers.
Abstract: Two experiments comparing user performance on ClearType and Regular displays are reported. In the first, 26 participants scanned a series of spreadsheets for target information. Speed of performance was significantly faster with ClearType. In the second experiment, 25 users read two articles for meaning. Reading speed was significantly faster for ClearType. In both experiments no differences in accuracy of performance or visual fatigue scores were observed. The data also reveal substantial individual differences in performance suggesting ClearType may not be universally beneficial to information workers.
29 citations
TL;DR: This study compares the on-screen legibility of six ClearType typefaces to that of two existing typefaces widely used for business documents, email, and websites to show that the legibility was higher for the ClearType typesetting as well as the non-ClearType typeface Verdana than for Times New Roman.
Abstract: This study compares the on-screen legibility of six ClearType typefaces to that of two existing typefaces widely used for business documents, email, and websites. Participants were presented with individual letters, digits, and symbols from each typeface for brief durations and asked to verbally identify the character. Percent correct identification for each character was calculated and graphical sunflower plots were used to highlight the characters misidentified. Results show that the legibility was higher for the ClearType typefaces Consolas and Cambria as well as the non-ClearType typeface Verdana than for Times New Roman, especially for digits and symbols.
24 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2018 | 1 |
| 2016 | 1 |
| 2011 | 1 |
| 2010 | 3 |
| 2009 | 1 |
| 2008 | 2 |