[Tex/LaTex] My pixel perfect picture gets blurry when compiled in LaTeX


I have this picture: http://dl.dropbox.com/u/3394117/Temp/fig1.png (I have the original in Pixen and could export it to several different formats. I went with PNG though since it's lossless.)

When I open my picture in Preview (OS X) and zoom in, it looks fine. The characters have extremely sharp boarders between them and the background. However, when I put it into my LaTeX document, compile it to a PDF (using TeXShop) and then zoom in, it suddenly have gotten blurry (see screenshot: http://dl.dropbox.com/u/3394117/Temp/Screen%20shot%202011-02-13%20at%2012.46.30.png).

Minimal working example:


In the end, I would like to be able to scale the picture freely without there being any blurring at all.

Best Answer

This is just an effect of the display settings of your PDF viewer. In Acrobat Reader 9, for example, there is an option "Edit | Preferences | Page Display | Smooth images". If you uncheck this box, the picture will not be anti-aliased. When printing, your image should look fine regardless of the smoothing effect you see on screen.

Here's your file in Acrobat Reader 9, zoomed to 800%, left half with the default "Smooth images", right half with the option unchecked. Note the tick mark and the red X:

enter image description here

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