Image convolution: Difference between revisions
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SqrtNegInf (talk | contribs) m (→{{header|Perl}}: change test image) |
SqrtNegInf (talk | contribs) (→{{header|Perl 6}}: clone of Perl 5, for now) |
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=={{header|Perl 6}}== |
=={{header|Perl 6}}== |
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<lang perl6> |
<lang perl6>use PDL:from<Perl5>; |
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use PDL::Image2D:from<Perl5>; |
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my $kernel = pdl [[-2, -1, 0],[-1, 1, 1], [0, 1, 2]]; # emboss |
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# Reference: |
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# https://github.com/azawawi/perl6-magickwand |
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# http://www.imagemagick.org/Usage/convolve/ |
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my $image = rpic 'frog.png'; |
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use v6; |
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my $smoothed = conv2d $image, $kernel, {Boundary => 'Truncate'}; |
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wpic $smoothed, 'frog_convolution.png';</lang> |
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use MagickWand; |
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Compare offsite images: [https://github.com/SqrtNegInf/Rosettacode-Perl6-Smoke/blob/master/ref/frog.png frog.png] vs. |
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[https://github.com/SqrtNegInf/Rosettacode-Perl6-Smoke/blob/master/ref/frog_convolution.png frog_convolution.png] |
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# A new magic wand |
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my $original = MagickWand.new; |
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# Read an image |
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$original.read("./Lenna100.jpg") or die; |
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my $o = $original.clone; |
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# using coefficients from kernel "Sobel" |
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# http://www.imagemagick.org/Usage/convolve/#sobel |
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$o.convolve( [ 1, 0, -1, |
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2, 0, -2, |
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1, 0, -1] ); |
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$o.write("Lenna100-convoluted.jpg") or die; |
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# And cleanup on exit |
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LEAVE { |
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$original.cleanup if $original.defined; |
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$o.cleanup if $o.defined; |
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}</lang> |
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=={{header|Phix}}== |
=={{header|Phix}}== |
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