Hello my friends! How are you? It’s been a long time since the last time I posted an article! In this one I would like to present you some digital image processing algorithms implemented with C++ and OpenCV.
Although, OpenCV supports most of these algorithms out-of-the-box what I am trying to show you actually is how you could implement these manually with C++. So, OpenCV is used here just only for opening and manipulating an image as a Mat object (OpenCV’s basic image container).
Whenever we create a new source code file for a free software with Emacs we need first to add the short brief of the blessed GNU GPL v3. You can add a LISP function to your “~/.emacs” configuration file and call it whenever you want to add it.
If the file is missing you can create it.
After inserting the function and restarting Emacs you can call the function:
M-x insert-short-gpl (press Alt-x, type insert-short-gpl, press return).
Many text editors create backup files with names ending with “~”.
Most of the times these files are annoying and unnecessary…
So, you can use the following piped commands to remove them :
find / | grep "^.*~$"
| sed -e 's/\(^.*$\)/"\1"/g'
| xargs rm -f > /dev/null 2>&1
Please take account that this version handles correctly also filepaths containing space characters.
Within the framework of the course “Operating Systems I – Laboratory” (Department of Informatics and Communications, T.E.I. of Central Macedonia) we were asked to choose one of 25 available projects aiming to implement and then present to the entire class. My choice was project 17, whose goal was the implementation of the external ‘find’ command of the operating system MS-DOS.
Within the framework of the course “Operating Systems II – Laboratory” (Department of Informatics and Communications, T.E.I. of Central Macedonia) we were asked to choose one of the 20 available projects to achieve. My choice was project 10, whose goal was to implement a birthday and celebrations alert system.
Probably sometime you will need to write a program in assembly language. For this reason, in this article we will develop a simple and typical executable “Hello World” program in assembly language to familiarize yourself with the process.
In this article, I quote a personal documentation implementation of the source code of the application “GNU Find String” using the Doxygen system. The source code of the application is written in ANSI C. You’ll find the documentation here: Doxygen documentation of the source code of the application “GNU Find String”.
Within the framework of the course “Programming II – Laboratory” (Department of Informatics and Communications, T.E.I. of Central Macedonia) we were asked to implement as homework a program that reads characters from the standard input and then export to standard output a frequency histogram of the characters that appear.
The project ‘dec2bin’ (decimal to binary converter) is the implementation of an idea I had for some time. I have to admit that sometime in the past when studying possible ways of programming embedded systems with the programming language C and C++, I felt the need to be able to produce, through a program, supposed memory addresses in the form of binary numbers.
Efstathios Chatzikyriakidis 