[R] Artifacts in pdf() of image() (w/o comments)

Duncan Murdoch murdoch at stats.uwo.ca
Mon Aug 13 17:56:47 CEST 2007

On 8/13/2007 11:43 AM, Michael Kubovy wrote:
> But is it a bug? Can a program anti-alias text and line drawings and  
> not bitmaps?

Anti-aliasing is the removal of artifacts caused by displaying an image 
on a low-resolution bitmapped display.  Introducing artifacts is a bug.

If it wasn't a bug, why did it bother you so much?  And why do you think 
it's reasonable to complain about it on R-help, but not to complain 
about it to Apple, who are clearly responsible for it?

Duncan Murdoch

> On Aug 13, 2007, at 9:30 AM, Duncan Murdoch wrote:
>> On 8/13/2007 11:07 AM, Michael Kubovy wrote:
>>> Dear Friends,
>>> Thanks for your input.
>>> FYI: Preview doesn't show PDF aliasing in the image I produced if  
>>> I  uncheck the "Anti-alias text and line art" box under the PDF  
>>> tab in  Preferences. So I'm not yet ready to drop Preview from my  
>>> toolbox.
>> An alternative to dropping Preview is to report the bug in it to  
>> Apple.  Apple has an online bug reporting web page somewhere; I  
>> haven't found them as helpful as R-help, but your mileage may vary.
>> Duncan Murdoch
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