Re: [matplotlib-devel] One-pixel gap sometimes appears between AxesImage and axis frame

[Michael D. <md...@st...>]

You're welcome.  Sorry I forgot to let you and the list know about it. ;)

Cheers,
Mike

Stan West wrote:
> Mike,
>
> I just noticed your revision 5402 to image.py.  Thank you for addressing
> this.
>
> Stan 
>
>
> -----Original Message-----
> From: Michael Droettboom [mailto:md...@st...] 
> Sent: Thursday, June 05, 2008 12:03
> To: Stan West
> Cc: mat...@li...
> Subject: Re: [matplotlib-devel] One-pixel gap sometimes appears between
> AxesImage and axis frame
>
> This happens because the axes rectangle is rounded to the nearest pixels by
> (essentially, hand-waving over the details) doing
>
>  (int)x0, (int)y0, (int)x1, (int)y1
>
> where x0, y0, x1, y1 are the bounds of the box, whereas images are rounded
> to the nearest pixels by:
>
>  (int)x0, (int)y0, (int)x0 + (int)width, (int)y0 + (int)height
>
> This should be fixable, but the implementation details make it a little
> tricky.  I'm looking into this and will get back to you.
>
> Cheers,
> Mike
>
> Stan West wrote:
>   
>> Hi.  When I generate an AxesImage with, say, imshow(array([[0, 1], [1, 
>> 0]])), a one-pixel gap sometimes appears between the image and the 
>> bottom and/or right edges of the axis frame.  The gap is sometimes 
>> shaded, as if by anti-aliasing.  The presence and shading of the gap 
>> depends on the axis size, figure size, and figure dpi.  In particular, 
>> the gap comes and goes as I resize the figure.  I've observed this 
>> using the WXAgg and TkAgg backends under matplotlib 0.98.0.
>>
>> I checked the trackers and mailing list archives but found no previous 
>> mention of this behavior.
>>
>> I looked into image.py but didn't readily see what might be responsible.
>> Would someone in the know be willing to investigate?  Many thanks in 
>> advance.
>>
>>
>>
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>>   
>>     
>
> --
> Michael Droettboom
> Science Software Branch
> Operations and Engineering Division
> Space Telescope Science Institute
> Operated by AURA for NASA
>
>
>
>   

-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA