From 571266a5137322a135d62b311c840b7f781cf9fb Mon Sep 17 00:00:00 2001
From: josch <j.schauer@email.de>
Date: Thu, 29 Mar 2012 11:12:20 +0200
Subject: [PATCH] add test_comp.sh

---
 test_comp.sh | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100755 test_comp.sh

diff --git a/test_comp.sh b/test_comp.sh
new file mode 100755
index 0000000..ae832e2
--- /dev/null
+++ b/test_comp.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+if [ $# -ne 1 ]; then
+	echo "usage: $0 image"
+	exit
+fi
+
+echo "converting image to pdf, trying all compressions imagemagick has to offer"
+echo "if, as a result, Zip/FlateDecode should NOT be the lossless compression with the lowest size ratio, contact me j [dot] schauer [at] email [dot] de"
+echo "also, send me the image in question"
+echo
+
+imsize=`stat -c "%s" "$1"`
+
+for a in `convert -list compress`; do
+	echo "encode:\t$a"
+	convert "$1" -compress $a "`basename $1 .jpg`.pdf"
+	pdfimages "`basename $1 .jpg`.pdf" "`basename $1 .jpg`"
+	/bin/echo -ne "diff:\t"
+	diff=`compare -metric AE "$1" "\`basename $1 .jpg\`-000.ppm" null: 2>&1`
+	if [ "$diff" != "0" ]; then
+		echo "lossy"
+	else
+		echo "lossless"
+	fi
+	/bin/echo -ne "size:\t"
+	pdfsize=`stat -c "%s" "\`basename $1 .jpg\`.pdf"`
+	echo "scale=1;$pdfsize/$imsize" | bc
+	/bin/echo -ne "pdf:\t"
+	grep --max-count=1 --text /Filter "`basename $1 .jpg`.pdf"
+	echo
+done