September 2008
Beginner to intermediate
580 pages
20h 7m
English
Content preview from Learning OpenCVBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Exercises
Download and install OpenCV if you have not already done so. Systematically go through the directory structure. Note in particular the docs directory; there you can load index.htm, which further links to the main documentation of the library. Further explore the main areas of the library. Cxcore contains the basic data structures and algorithms, cv contains the image processing and vision algorithms, ml includes algorithms for machine learning and clustering, and otherlibs/highgui contains the I/O functions. Check out the _make directory (containing the OpenCV build files) and also the samples directory, where example code is stored.
Go to the …/opencv/_make directory. On Windows, open the solution file opencv.sln; on Linux, open the appropriate makefile. Build the library in both the debug and the release versions. This may take some time, but you will need the resulting library and dll files.
Go to the …/opencv/samples/c/ directory. Create a project or make file and then import and build lkdemo.c (this is an example motion tracking program). Attach a camera to your system and run the code. With the display window selected, type "r" to initialize tracking. You can add points by clicking on video positions with the mouse. You can also switch to watching only the points (and not the image) by typing "n". Typing "n" again will toggle between "night" and "day" views.
Use the capture and store code in Example 2-10, together with the
doPyrDown()code of Example 2-5 to create a ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.