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  #1  
Old 8th April 2009, 05:14 PM
daviddoria Offline
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Join Date: Oct 2007
Posts: 884
Increase image size without interpolation (image magick)

Does anyone know how to turn off interpolation (resulting in each pixel simply being copied around itself multiple times)?

If I do this
Code:
convert -resize 5000% Small.jpg Big.jpg
it uses some default interpolation. I can specify an interpolation like this:
Code:
convert -resize 5000% -interpolate Average Small.jpg Big.jpg
But there is no option for "none". Anyone know an argument to do this?

Thanks,
Dave
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  #2  
Old 8th April 2009, 06:13 PM
JohnVV Offline
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Posts: 3,921
using imagemagick , no . But in gimp you can select "none" when resizing .
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  #3  
Old 8th April 2009, 06:22 PM
daviddoria Offline
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Yea, I found that, but I'd like to batch enlarge multiple images, so doing it gimp isn't really an option.

Dave
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  #4  
Old 9th April 2009, 01:32 AM
daviddoria Offline
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Posts: 884
I asked on the image magick forum and it is possible, and even easy!
Code:
convert small.jpg -scale 5000% big.jpg
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  #5  
Old 9th April 2009, 01:07 PM
RupertPupkin Offline
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Join Date: Nov 2006
Location: Detroit
Posts: 5,457
Quote:
Originally Posted by daviddoria View Post
I'd like to batch enlarge multiple images, so doing it gimp isn't really an option.
gimp can be used in noninteractive batch mode, so you could've used it (though you'd have to learn its Script-Fu command language, which isn't that hard). But for something as simple as this, ImageMagick is easier.
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