Tuesday, January 10th, 2012, 6 years ago

Fixing ‘ QMainWindow: No such file or directory’ in v4l installation with Ubuntu

Screenshot-cw418@hud-desktop: ~-Documents-OpenCV-2.3.1-build

Thanks to the comprehensive troubleshooting guide to opencv installation posted by Osman, some install errors could be referred and fixed. But some errors are not included in that guide, as the chance of the error is various.

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Sunday, January 8th, 2012, 6 years ago

The first set of images captured from the Xtion pro with Ubuntu on Pandaboard

Screenshot - xtion depth image 1

The initial outcomes of the OpenNI installation

A previous post has described an overall progress of installing OpenNI in Linux-arm -based pandaboard with Xtion pro. This post is a sequence of the instsallation, which demonstrates the success of OpenNI installation, and the working of Xtion pro with Linux-arm Ubuntu.

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Saturday, January 7th, 2012, 6 years ago

Installing OpenNI for Linux-ARM in Ubuntu Pandaboard

Screenshot-cw418@hud-desktop_ ~-Documents-OpenNI-Platform-Linux-Build-1-make-install

About OpenNI

OpenNI has shown some lights to natural interactions by using depth map images together with RGB images from cameras. Natural human gestures, e.g. hand moving, limbs movements are all being developed fast. Microsoft Kinect is a typical example that demonstrated the huge potential of the OpenNI in terms of game applications. While, more work could be done with OpenNI, with other devices that could capture depth images, e.g. ASUS’s Xtion pro. In the OpenNI community supported by manufacturers e.g. Primesense, Microsoft and Asus more information could be found in openni.org.

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Thursday, December 22nd, 2011, 7 years ago

Installing openCV in Ubuntu with pandaboard part 5 – running openCV 2.3.1 examples

Screenshot-root@hud-desktop: ~-Downloads-OpenCV-2.3.1

The last tutorial about installing opencv in ubuntu with pandaboard 4 – compiling the opencv 2.3.1 did not complete the final compile steps, this post aims to complete that.

Continue the compiling of openCV 2.3.1

I assume you have finished the openCV compiling using cmake ., make, and make install commands in the terminal. Bear in my mind there is one thing I need to remind – be aware of the system date and time, as I left that incorrect and made some unnecessary compiling mistakes.

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Wednesday, December 21st, 2011, 7 years ago

Installing openCV in Ubuntu with pandaboard part 4 – compiling openCV 2.3.1


Before the compiling

I was about to write a post about compiling the newest openCV 2.3.1 in Ubuntu with pandaboard, but because of the proxy network problem in Ubuntu software update and the right solution to the proxy network settings, this post was postponed.

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Tuesday, December 20th, 2011, 7 years ago

Installing openCV in Ubuntu with pandaboard part 3 – the network proxy

Screenshot-Synaptic Package Manager

The problem of networking proxy in ubuntu for openCV installation

In the last post instsalling openCV in Ubuntu with pandaboard a networking proxy problem was raised. The problem is relevant to software updates and installations in Ubuntu, before and after openCV installation. There were two general suggestions made in the previous post – finding a new network environment, or, properly setting up the proxy parameters.
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Friday, December 16th, 2011, 7 years ago

Installing openCV in Ubuntu with pandaboard part 2

install opencv in ubuntu 11.04 with pandaboard

How to install openCV in Ubuntu without networks

In the last post of installing openCV in Ubuntu with pandaboard, the failure of software update of openCV was discussed. But if there was no alternative to switch to other working networks, then the only way to install openCV in Ubuntu is as the way showed in this post.

– first, downloading the OpenCV-2.3.1a.tar.bz2 from openCV wiki, selecting ‘other announcements’ then going to ‘for mac and linux’, the page will be directed to sourceforge in this page: http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/.

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Wednesday, December 14th, 2011, 7 years ago

Installing openCV in Ubuntu with pandaboard part 1

opencv in ubuntu with pandaboard

OpenCV at ubuntu with pandaboard

At the first beginning of post, I would like to remind a tiny, but sometimes may huge, problem in installing openCV at ubuntu with pandaboard – the network proxy setting. This tiny issue could be the fatal problem when it was not aware of. I had tried hundreds of times to ‘apt-get update’ but nothing worked out. After I searched the problem of ‘failed to fetch…’, I was not well informed about how severe that problem was. Until I tied to change the Ubuntu Software Center’s networking settings, I noticed there was an tap used for networking proxy purposes.

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Monday, December 12th, 2011, 7 years ago

OpenCV mailing list – a collection of resources

opencv mailing list

Useful openCV mailing list

Someone in the comments asked where to get so much information about openCV learning and developing, well, one of my primary source to get openCV related information – as well as most people’s issues they are facing recently is the openCV mailing list – a good way to receive archived threads and discussions from lots groups such as yahoo openCV groups and google openCV groups, and even stackoverflow q&a forum, or maybe the canonical openCV wiki is also a good source.
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