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authorNick White <git@njw.me.uk>2011-11-07 20:09:55 +0000
committerNick White <git@njw.me.uk>2011-11-07 20:09:55 +0000
commitfca6360e428cfd63c0d8f9fc30b83d27a611bf4a (patch)
tree369fc52946e4f5e770461d4db92573456f87984c /extras/mkocrpdf.sh
parent2fc2aed916f9d2a5c02f434d2532e80d04f2821a (diff)
Dramatically improve mkocrpdf script
Diffstat (limited to 'extras/mkocrpdf.sh')
-rw-r--r--extras/mkocrpdf.sh19
1 files changed, 11 insertions, 8 deletions
diff --git a/extras/mkocrpdf.sh b/extras/mkocrpdf.sh
index 165059a..3a01559 100644
--- a/extras/mkocrpdf.sh
+++ b/extras/mkocrpdf.sh
@@ -1,22 +1,25 @@
#!/bin/sh
+# See COPYING file for copyright and license details.
#
# Makes a PDF with embedded text extracted by tesseract
-#
-# Requires imagemagick, pdftk, hocr2pdf and tesseract
-#
-# Also requires this tesseract configuration:
-# echo 'tessedit_create_hocr 1' > /usr/local/share/tessdata/configs/hocr
+# Requires imagemagick, pdftk, hocr2pdf and tesseract 3
+
+echo 'tessedit_create_hocr 1' > hocr
for i in `ls *png`
do
a=`basename $i .png`
echo processing $a
- tesseract $i $a hocr 2>/dev/null
+ # unfortunately tesseract seems to work much better with a
+ # resized larger image
+ convert $i -geometry 1000x $a.big.png
+ tesseract $a.big.png $a hocr 2>/dev/null
# hocr2pdf has a habit of segfaulting, so fall back to convert
- hocr2pdf -i $i -o $a.pdf < $a.html || convert $i $a.pdf
- rm -f $a.html
+ hocr2pdf -i $a.big.png -o $a.pdf < $a.html || convert $a.big.png $a.pdf
+ rm -f $a.html $a.big.png
done
pdftk *pdf cat output book.pdf
+rm -f [0-9]*pdf hocr