#!/usr/bin/perl
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#
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# Methods for to Get and Set single pixels in images using PerlMagick
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#
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use strict;
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use Image::Magick;
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# read image
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my $im=Image::Magick->new();
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$im->Read('logo:');
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# ---
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# Get/Set a single pixel as a string
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my $skin=$im->Get('pixel[400,200]');
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print "Get('pixel[x,y]') = ", $skin, "\n";
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$im->Set('pixel[1,1]'=>'0,0,0,0');
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$im->Set('pixel[2,1]'=>$skin);
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$im->Set('pixel[3,1]'=>'green');
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$im->Set('pixel[4,1]'=>'rgb(255,0,255)');
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# ---
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# More direct single pixel access
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my @pixel = $im->GetPixel( x=>400, y=>200 );
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print "GetPixel() = ", "@pixel", "\n";
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# modify the pixel values (as normalized floats)
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$pixel[0] = $pixel[0]/2; # darken red value
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$pixel[1] = 0.0; # junk green value
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$pixel[2] = 0.0; # junk blue value
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# write pixel to destination
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# (quantization and clipping happens here)
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$im->SetPixel(x=>5,y=>1,color=>\@pixel);
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# ---
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# crop, scale, display the changed pixels
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$im->Crop(geometry=>'7x3+0+0');
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$im->Set(page=>'0x0+0+0');
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$im->Scale('1000%');
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# Output the changed pixels
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$im->Write('win:');
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$im->Write('single-pixels.gif');
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