Unable to capture images in Linux OS

--- Also can you please mention required list of softwares
http://sikuli.org/download.shtml

... and many Q&A's here on different Linux versions

Come back if you installation is correct.

Can we use sikuli to test applications developed using QT (c++).

Yes you can.

Actually i have downloaded the below:

Linux

Linux version is a portable zip, no installation required. Just run sikuli-ide.sh in Sikuli-IDE/ to start it.
Make sure you have Java Runtime Environment (JRE) 6, wmctrl, and OpenCV 2.1 (libcv2.1, libcvaux2.1, libhighgui2.1) installed.

    Sikuli-X-1.0rc3 (r905)-linux-i686.zip (For 32bit Linux)

But I have installed higher versions of libcv2.1, libcvaux2.1, libhighgui2.1.

Is this correct or anything else should be installed. I am unable to capture images.

Hi,

I am able to capture images now.

But tool is getting aborted when capturing big images.

relevant part of error message?

 [info] locale: en_US
Error opening data file /tmp/sikuli/tessdata/eng.traineddata
Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.
Failed loading language 'eng'
Tesseract couldn't load any languages!
vlog 1 Input
vlog 1 Canny
vlog 1 AdaptiveThresholded
vlog 1 LongLinesFound
vlog 1 LongLinesRemoved
vlog 1 NonEdgeRemoved
vlog 1 blobs-extracted
vlog 1 blobs-filtered
vlog 1 lineblobs
vlog 1 lineblobs-filtered
vlog 1 lineblobs-merged
vlog 1 paragblobs
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x85555b6d, pid=2428, tid=2317286208
#
# JRE version: 6.0_24-b24
# Java VM: OpenJDK Server VM (20.0-b12 mixed mode linux-x86 )
# Derivative: IcedTea6 1.11.4
# Distribution: Ubuntu 12.04 LTS, package 6b24-1.11.4-1ubuntu0.12.04.1
# Problematic frame:
# C [libtesseract.so.3+0x226b6d] tesseract::Classify::CharNormClassifier(TBLOB*, DENORM const&, INT_TEMPLATES_STRUCT*, ADAPT_RESULTS*)+0x61
#
# An error report file with more information is saved as:
# /home/votarytech/hs_err_pid2428.log
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
# https://bugs.launchpad.net/ubuntu/+source/openjdk-6/
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Aborted (core dumped)

check your Tesseract installation.

Tesseract 2.04 is needed, you might have Tesseract 3 on your machine.

Se other Q&A's on that.

libtesseract.so.3 looks defenitely like tesseract 3

If you run ubuntu, you can use "apt-get install sikuli" to install a version of sikuli that runs with tesseract 3.
If not, you can download it here http://code.google.com/p/tesseract-ocr/downloads/detail?name=tesseract-2.04.tar.gz&can=2&q=
and compile it yourself

This seems to be a packaging bug, "in progress", with a workaround documented here:

Bug #979524 “Ubuntu 12: sikuli-ide crashes with Tesseract 3.0 --...” : Bugs : Sikuli
 https://bugs.launchpad.net/sikuli/+bug/979524