I had success with the newFromJpeg constructor, with the $truecolor flag set to 1. 

my $im = GD::Image->newFromJpeg( $jpg, 1 );

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It was quite educational to run the identify -verbose command (from the ImageMagick suite) on the "before" and "after" images.

In reply to Re^4: Perl GD problem with colors for text by gmargo
in thread Perl GD problem with colors for text by natol44

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