YAPC::Asia 2011 by yusukebe

5. use strict;
use warnings;
use Imager;
my $file = 'doya.jpg';
my $image = Imager->new( file => $file ) or die Imager->errstr;
$image = $image->scale( xpixels => 100 );
$image->write( file => 'out.jpg' ) or die $image->errstr;

6. ...;
my $image = Imager->new( file => $file ) or die Imager->errstr;
$image = $image->scale( xpixels => 100 );
$image = $image->crop( height => 100 ); #
$image->write( file => 'out.jpg' ) or die $image->errstr;
...;

11. sub get_map {
my $gamma = shift;
my @map =
map { int( 0.5 + 255 * ( $_ / 255 )**$gamma ) } 0 .. 255;
return @map;
}
$image->map(
red => get_map(0.5),
green => get_map(0.65),
blue => get_map(0.8)
);
my $waku = Imager->new( file => 'waku.png' );
$image->rubthrough( src => $waku );

20. ...;
my $font = Imager::Font->new( file => 'HiraKakuPro-W3.ttf' );
...;

21. ...;
my $qrcode = Imager::QRCode->new(
size => 3,
margin => 0,
version => 1,
level => 'M',
casesensitive => 1,
lightcolor => Imager::Color->new( 255, 255, 255 ),
darkcolor => Imager::Color->new( 35, 54, 92 ),
);
my $qr = $qrcode->plot( $text );
$qr = $qr->scale( xpixels => 90 );
$image = $image->paste( left => 590, top => 198, src => $qr );
...;

25. ff

26. ...;
my $diff = $org->difference( other => $numbers[$n] );
$diff = $diff->to_rgb8;
my $count;
for ( my $x = 0 ; $x < $width ; $x++ ) {
for ( my $y = 0 ; $y < 38 ; $y++ ) {
my $pixel = $diff->getpixel( x => $x, y => $y );
next unless $pixel;
my $result = $pixel->rgba;
$count++ if $result == 255;
}
}
...;

32. use Imager;
use Image::ObjectDetect;
my $image = Imager->new->read( file => 'picture.jpg' );
my $cascade = './haarcascade_frontalface_alt2.xml';
my $detector = Image::ObjectDetect->new($cascade);
my @faces = $detector->detect($file); #←
my $purple_source = Imager->new->read(file => './purple.png');
my $aspect = 1.5;
for my $face (@faces) {
my $purple = $purple_source->scale(
xpixels => $face->{width} / $aspect,
ypixels => $face->{height} / $aspect,
);
$image->rubthrough(
tx => $face->{width} / $aspect / 2 + $face->{x},
ty => $face->{height} / $aspect + $face->{y},
src => $purple,
);
}
$image->write( file => './output.jpg' );

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42. use Acme::Porn::JP;
…;
my $porn = Acme::Porn::JP->new;
my $actress_list = $porn->actress();
for my $actress ( @$actress_list ){
search("$query $actress”);
}
…;
$ perl -MAcme::Porn::JP -e '$p = Ace::Porn::JP->new; print
scalar @{$p->actress};’
4502

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positive.dat
[filename]
[#
of
objects]
[[x
y
width
height]
[...
2nd
object]
...]
images/01.jpg
1
140
100
45
45
nega%ve.dat
images/neg-­‐01.jpg
images/neg-­‐02.jpg