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872天前QUOTE: |
#!/usr/local/bin/perl |
use Image::Magick; |
my ( $image, $x ); |
$image = Image::Magick->new; |
$x = $image->Read ( 'girl.png', 'logo.png', 'rose.png' ); |
warn "$x" if "$x"; |
$x = $image->Crop ( geometry=>'100x100"+100"+100' ); |
warn "$x" if "$x"; |
$x = $image->Write ( 'x.png' ); |
warn "$x" if "$x"; |
The script reads three images, crops them, and writes a single image as a GIF animation |
sequence. In many cases you may want to access individual images of a sequence. The next |
example illustrates how this is done: |
QUOTE: |
#!/usr/local/bin/perl |
use Image::Magick; |
my ( $image, $p, $q ); |
$image = new Image::Magick; |
$image->Read ( 'x1.png' ); |
$image->Read ( 'j*.jpg' ); |
$image->Read ( 'k.miff[1, 5, 3]' ); |
$image->Contrast(); |
for ( $x = 0; $image->[x]; $x++ ) |
{ |
$image->[x]->Frame ( '100x200' ) if $image->[x]->Get ( 'magick' ) eq 'GIF'; |
undef $image->[x] if $image->[x]->Get ( 'columns' ) < 100; |
} |
$p = $image->[1]; |
$p->Draw ( stroke=>'red', primitive=>'rectangle', points=>20,20 100,100'); |
$q = $p->Montage(); |
undef $image; |
$q->Write('x.miff'); |
Suppose you want to start out with a 100 by 100 pixel white canvas with a red pixel in the |
center. Try |
QUOTE:$image = Image::Magick->new; |
$image->Set(size=>'100x100'); |
$image->ReadImage('xc:white'); |
$image->Set('pixel[49,49]'=>'red'); |
Or suppose you want to convert your color image to grayscale: |
QUOTE:$image->Quantize(colorspace=>'gray'); |
Here we annotate an image with a Taipai TrueType font: |
$text = 'Works like magick!'; |
$image->Annotate(font=>'kai.ttf', pointsize=>40, fill=>'green', text=>$text); |
Other clever things you can do with a PerlMagick objects include |
QUOTE:$i = $#$p"+1"; # return the number of images associated with object p |
push(@$q, @$p); # push the images from object p onto object q |
@$p = (); # delete the images but not the object p |
$p->Convolve([1, 2, 1, 2, 4, 2, 1, 2, 1]); # 3x3 Gaussian kernel |
by: 发表于：2017-09-11 11:51:45 顶(0) | 踩(0) 回复
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