How to export non-blurry eps images?

Question

I'm exporting an image in Matlab using the eps format, but it smooths the image. Matlab does not blur the image using other formats such as png. I would like to know how to export a non-blurry image with eps format. Here is the resulting image using png:

And here is the resulting image using eps:

Answer 1

UPDATE:

The problem is reproducible on a Mac, and the issue is with the eps renderer rather than MATLAB. For e.g., saving imagesc(rand(20)) and viewing with Preview and GSview results in the following:

Preview screenshot

GSview screenshot

Clearly, the information is not lost. It is just not interpreted/read correctly by some EPS viewers. The solution is simple: use GSview to view your eps images. You can download it from here

On Macs especially, if your end application is latex/pdflatex, you will have to explicitly set it to use GS/GSview, because otherwise, it will default to the Quartz engine, which is baked into the OS.

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PREVIOUS ANSWER:

I am unable to reproduce the behavior your described. Here is the code I used, tested using R2010b on WinXP 32-bit:

M = fspecial('gaussian',[20 20],5);
imagesc(M)
print('-dpng','a.png')
print('-depsc2','b.eps')

a.png

b.eps

Perhaps this is an issue with your EPS viewer...