Comments on: Tesseract: Google re-releases HP’s OCR tool

By: Steve

Steve — Sun, 24 Sep 2006 18:52:31 +0000

I guess that comment was too long.

Anyway, the tesseract part was:

convert $i.pgm \
-bordercolor white \
-border 10 \
temp.tif
tesseract temp.tif $i.pgm batch

By: Steve

Steve — Sun, 24 Sep 2006 18:50:27 +0000

I got it to work pretty well for .pgm files for subtitle ripping from DVDs. Seemed to slightly outperform gocr. The files I am working with are strictly black and white, and I had to add a white border to the .tif file for it to function properly.

#!/bin/bash

INPUT=$1
TITLE=$2
LANG=$3
COLOR=$4

SUBTITLE=`mplayer -dvd-device $INPUT dvd://1 -vo null -ao null -frames 0 -v 2>&1 | grep sid | grep $LANG | awk -F’ ‘ ‘{print “0x” 20+$5}’`

echo $SUBTITLE

tccat -i $INPUT -T $TITLE -L | tcextract -x ps1 -t vob -a $SUBTITLE > subs-$3

subtitle2pgm -o $3 -c $4 $LANG.srt

By: nemik

nemik — Fri, 15 Sep 2006 21:42:48 +0000

I eventually did get something but the detection still sucks pretty bad. I used the ‘convert’ command to adjust the contrast a lot to get something working but it only recognizes a few characters.

Maybe Google will fix it for nicer OCR for its book publishing thing, but something tells me they won’t release it if they do.

By: david dahl

david dahl — Fri, 15 Sep 2006 11:58:15 +0000

I did the same thing… same results. did you try making the tif a bitonal image with imagemagick? I would love to get this tool integrated with python.