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Top customer reviews
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Other reviewers did not try the installation directions for windows. I did.
Some of the links do not exist.
Many of the downloads are land mines - got to be real careful or you will install a bunch crap you did not want. I was not careful and one of the downloads created a new home page for me and installed two useless programs.
After lots of hours I don't have a useable OpenCV program writing capability. Some of the OpenCV paths that are to be used just don't exist in the version of OpenCV that I downloaded. Don't see anywhere I could have got them. OpenCV downloads don't seem to currently contain some of the stuff they may have in the past, so good luck with that part of the install.
Should have lit a match to a 10 dollar bill rather than buy this book. Would have been more fun and much faster. The book has killed my interest in writing a simple OpenCV program.
I am being sarcastic. This book sucks, and there's no code or information in there that is useful or I have not read anywhere else.
My issue with the book is that the linux installation instructions are incorrect, and the part of them that works is obviously stolen from a blog:
I don't know if the Windows part of the book is correct, but the linux information is a joke and the authors should be ashamed. I spend hours trying to figure out why their example code didn't build. Turns out the command they said would build the code is fundamentally incorrect.
The most interesting part is one called "Top 5 features you need to know about" and it covers things like pixel manipulation, image resizing or edge detection. The features are nicely organized into tasks, which states a problem (e.g. reading and displaying an image) and shows the solution. All code has very detailed explanations, but there is very little theory. For example in task regarding edge detection the Canny Edge Detector is used but there is no mention about morphological operations or even what Canny exactly does. It just states a problem and gives you a straightforward solution without going into theoretical reflections, which sometimes is good but it isn't very helpful in understanding the topic.
There was one part that I didn't like. The authors in one of the tasks describe a steganography as a "very interesting technology that is being used for the wrong reasons in the world today" and that's all about it. Not only this sentence is a very negative description of a technique that is quite neutral but doesn't explain what exactly steganography is. After saying that it is used for illegal purposes, there is, of course, an example how to use it :)
Also there is a short part with links to useful OpenCV sites. It isn't anything what you wouldn't find without a very short Google query, and probably you already been there because you are reading a book about OpenCV, but it is nice to have it organized. I would add some other links like Damiles blog (BTW Damiles is a reviewer of this book).
All in all it is a great book if you are an OpenCV beginner or want to have a quick look at OpenCV features. The book is written in very accessible way with clearly organized tasks. It covers the basics like pixel manipulations, color space transformations and video processing, but doesn't trouble you with excessive theory. It is a good read before some more serious lecture like "Learning OpenCV".
Perhaps the most helpful chapter is the introduction and the installation tutorial. The book does a very nice job at describing how to install OpenCV for both Linux and Windows. I also liked how they added some details about the various dependencies required for building on Linux.
The book wraps up with some fairly simple OpenCV examples and one really cool example of Image Steganography. And as always with Packt the source code is available from their site and is of good quality.