jbarth-ubhd

Comparison of text image compression

I've compared mozjpeg, webp, jpeg2000 (openjpeg & an proprietary encoder), jpeg-xl and avif with a text-like image containing circles with different width and tint.

See comparison-2022-11

The generated 920×920 px images (with different noise levels) are compressed with

/opt/mozjpeg/bin/cjpeg -quant-table 4 -q 75

	#!/usr/bin/perl
	use strict;
	use utf8;
	use warnings; no warnings "uninitialized";
	use autodie qw(:all);
	use Getopt::Long;
	binmode STDOUT, ":utf8";
	binmode STDERR, ":utf8";

	use File::Temp qw/tempdir/;

	#!/usr/bin/perl
	use strict;
	use utf8;
	use XML::LibXML;
	use XML::Quote;
	binmode STDOUT, ":utf8";

	my $dom=XML::LibXML->load_xml(location=>$ARGV[0]);
	my $root=$dom->documentElement;

	#!/usr/bin/perl
	use strict;
	use utf8;
	binmode(STDOUT, ":utf8");
	binmode(STDERR, ":utf8");
	use XML::LibXML;
	use File::Slurp;
	use XML::Quote;
	use List::Util qw(min max);