[magick-users] specify compression parameters of PNG in PerlMagick

[Günter Bachelier]

Hello,

Anthony Thyssen wrote on
http://www.imagemagick.org/Usage/formats/#png_quality
that a photo should best be used with the "adaptive" (= 5)
filtering and -quality 95. Is the PerlMagick transcription of this

$image->Write(filename=>'imagename.png', quality=>'95', filter=>'5');

What is PM using if the second parameter is not specified?

regards
Günter