在perl imagemagick中使用png水印，使png透明

Question

Need help with perl imagemagick!

I am trying to put a png watermark on jpg image,

$image = Image::Magick->new;
$image->Read('image_filename');

$logo = Image::Magick->new;
$logo->Read('watermark_filename');

$logo->Transparent(color=>'#FFFFFF');
$image->Composite(image=>$logo, gravity=>'southeast', geometry=>'-10-10'); 
$image->Write('final_filename');

Everything is ok, but I need my watermark is be transparent, when I am trying opacity=>'50%' it works, but the watermark png starts look like s...t:))

Answer 1

您是否考虑过使用GIMP手动创建水印或通过GD进行perlgrammaticly？