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Re: Show command trims bitmap edges? (newbie)

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  • Subject: [mg54600] Re: Show command trims bitmap edges? (newbie)
  • From: Paul Abbott <paul at>
  • Date: Thu, 24 Feb 2005 03:21:04 -0500 (EST)
  • Organization: The University of Western Australia
  • References: <cv6r3o$6ab$>
  • Sender: owner-wri-mathgroup at

In article <cv6r3o$6ab$1 at>,
 "Matthew McMahon" <matthew.mcmahon at> wrote:

> I've encountered a strange issue (running 5.0) that I couldn't find any
> references to in the Help or online documentation.  I'm importing tiny
> monochrome bitmap files into Mathematica, in order to create a pattern that
> tiles the black-pixel pattern in x and y repeatedly. 

There are other ways to generate pixel-level graphics. What is the 
application and what, exactly, are you trying to do?


> I can import the file
> correctly (I've checked with the Dimensions function and everything works
> properly), but when I use the Show command to check that I've got the right
> bitmap, I don't see the proper image.  I tested it by creating a
> 1-white-pixel-wide buffer around the original image, and then I saw the
> correct original image with the Show command.  So it appears that the Show
> command is somehow cropping the image by 1 pixel (for images smaller than
> 10x10 pixels).
> I suppose I could just design all my bitmaps with an extra pixel buffer, but
> that's much less elegant.  Does anyone know why this is happening?
> Appreciating any help,
> Matthew

Paul Abbott                                   Phone: +61 8 6488 2734
School of Physics, M013                         Fax: +61 8 6488 1014
The University of Western Australia      (CRICOS Provider No 00126G)         
35 Stirling Highway
Crawley WA 6009                      mailto:paul at 

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