Anti-Aliased Text
Home: Graphic Design
Graphics Books
Graphics File Formats
  Animation File Formats
Bitmap File Formats
CAD File Formats
Cursor File Formats
Font File Formats
Icon File Formats
Metafile File Formats
Prepress File Formats
Vector File Formats
Video File Formats
Web File Formats
More Graphics File Formats
Graphics Software
  Banner Design Software
CAD Software
Diagram Drawing Software
Illustration Software
Photo Editing Software
Video Conversion Software
More Graphics Software
Graphics Tutorials
  • Adobe Dreamweaver Tutorials
  • Adobe Photoshop Tutorials
  • AutoCAD Tutorials
  • How To Draw Tutorials
    Banner Design Tutorial
    Banner Display Tutorial
    Color Combinations Tutorial
    Color-Safe Conversion Tutorial
    eBook Covers Tutorial
    Favicon Tutorial
    GIF + Photo Tutorial
    Good Web Design
    Image Slice Tutorial
    Image Tiling Tutorial
    Imagemap Tutorial
    Photography Tutorial
    Prevent Copying Tutorial
    Screenshots Tutorial
    Should I Use Flash?
    Text to Images Tutorial
    Web Image File Formats
    More Graphics Tutorials
    Graphics Glossary

    Learn PhotoShop Now

    Step-By-Step Video Tutorials Reveal Shortcut Secrets On How To Conquer Adobe Photoshop Quickly And Easily...
    Click here


    Read the Review of Learn How to Use Photoshop
      >  Glossary  >  Anti-Aliased Text



    Anti-Aliased Text

    Anti-aliasing is a method of drawing text or pictures which smooths edges, and avoids jagged edges ("jaggies").

    In this article we'll discuss anti-aliasing as applied to drawing text.

    Imagine that we wish to place a character glyph from an outline font on a bitmap. Looking at it closely (enlarging so that you can see the individual pixels), it might look something like this example:

    Overlaying a Glyph on a Pixel Grid

    There is an obvious problem, if you look closely at the above diagram. Namely, when we try to convert the glyph to a bitmap ("rasterise"), we can only have a single color for each individual pixel, but some of the cells in the pixel grid contain both red and white.

    So how do we address this problem?

    A simple solution (not anti-aliased) would be to look at each pixel cell:
    • If the pixel cell contains nothing but white, we make the pixel white.

    • If the pixel cell contains nothing but red, we make the pixel red.

    • If the pixel cell contains both red and white, we can choose to make the pixel red or white. For example, we might choose whichever color covers a larger proportion of the cell.
    Here's an example of how this might look:

    The Glyph Rasterised
    Not Anti-Aliased

    That isn't bad, but as you can see, it does look a little bit jagged (see "Jaggies").

    This problem can be addressed by modifying our method of rasterising the glyph. This new method (anti-aliasing) works:
    • As before: If the pixel cell contains nothing but white, we make the pixel white.

    • As before: If the pixel cell contains nothing but red, we make the pixel red.

    • However: If the pixel cell contains both red and white, we make the pixel an intermediate color between red or white (a lighter shade of red).

      • The more white in the pixel cell, the lighter (more whitish) we make the final pixel color.

      • The more red in the pixel cell, the redder we make the final pixel color.
    Here is the result it produces:

    The Glyph Rasterised

    This time, it doesn't look jagged, but it does (to some eyes at least), look a little blurred. This difference will become clearer when we compare the images at their final sizes.

    Finally, here is a comparison, at actual size, of text which has been anti-aliased, and text which has not been. (I have also included a comparison between two blocks of black and white text - in this case, the anti-aliasing is done using shades of gray rather than red).

    Not Anti-Aliased Anti-Aliased





    Discuss Anti-Aliased Text


    Please feel free to post your comments using Facebook or Disqus:

    Facebook Comments:

    Disqus Comments:

    comments powered by Disqus

    Related Pages on this site:
    Related Web Sites:
    Photo Editor X Photo Editing Software

    Disclosure: Our company's websites' content (including this website's content) includes advertisements for our own company's websites, products, and services, and for other organization's websites, products, and services. In the case of links to other organization's websites, our company may receive a payment, (1) if you purchase products or services, or (2) if you sign-up for third party offers, after following links from this website. Unless specifically otherwise stated, information about other organization's products and services, is based on information provided by that organization, the product/service vendor, and/or publicly available information - and should not be taken to mean that we have used the product/service in question. Additionally, our company's websites contain some adverts which we are paid to display, but whose content is not selected by us, such as Google AdSense ads. For more detailed information, please see Advertising/Endorsements Disclosures

    Our sites use cookies, some of which may already be set on your computer. Use of our site constitutes consent for this. For details, please see Privacy.

    Contact Us     Privacy     Terms Of Use     Advertising/Endorsements Disclosures

    Copyright © 2005-2014, Answers 2000 Limited

    In Association With
    Answers 2000 Limited is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to

    All trademarks are property of their respective owners.
    All third party content and adverts are copyright of their respective owners.

    Some graphics on our web sites are Copyright (C) 1997-2000 Hemera Technologies Inc., and used under license. All such pictures are provided for viewing purposes only and are not to be saved or downloaded. All such pictures of recognizable individuals are models and used for illustrative purposes only, and not meant to imply any association or endorsement of said individual with any product or service.
    Photo Editor X Photo Editing Software