Intermezzo: display image from camera

After 3 exercises from book ‘Learning OpenCV’, it’s time for intermezzo. There is interesting sample program in OpenCV website on how to capture image from camera.

Example 2-3: Playing video file with trackbar position

In Example 2-2 we can only play video as it is, we can’t seek next few frame or look back few frame. In this example we will add track bar position to be able to jump to arbitrary frame in video.
Our “weapon” is the API to create track bar (i.e. cvCreateTrackbar), and not less important we also need API cvGetCaptureProperty to retrieve information like number of frames in video file.

Example 2.2 – Playing video file

OK, let’s move on to next program example in book “Learning OpenCV“. After simple program to display image, now we write simple program to play a video file.

Setting Up OpenCV in Eclipse CDT

As comment to my post Setting Up OpenCV to Work with Visual C++ 2008 from agung, and I become more familiar to eclipse due to another project, I’m interested to setup OpenCV in Eclipse and MinGW. Open source project run with open source development tool and IDE is a great match thing.

OpenCV Structure and Content (Overview)

OpenCV is broadly structured into five main components, four of which are shown in figure below.

Setting Up OpenCV to Work with Visual C++ 2008

We will use Microsoft Visual C++ 2008 Express Edition as C++ Compiler and IDE (because it’s free 🙂 ) to build OpenCV project, on Windows XP platform. As mentioned in Open CV Install Guide, we need:

What is OpenCV

OpenCV (Open Source Computer Vision) is a library of programming functions for real time computer vision.