Tutorials

Golang : Merge video(OpenCV) and audio(PortAudio) into a mp4 file

3rd November 2016

The previous Golang tutorials cover on how to capture image frames from a web camera with OpenCV and….... read more

Golang : Detect sample rate, channels or latency with PortAudio

1st November 2016

Problem:

You want to detect the sample rate, channels or latency of the input and output devices attached to your….... read more

Golang : Record voice(audio) from microphone to .WAV file

1st November 2016

Problem:

You need to activate your microphone, record your voice and save the data into a .wav file from command….... read more

Golang : Surveillance with web camera and OpenCV

31st October 2016

Times are bad and the economy in Malaysia is not doing well. People in my neighborhood are worried about the….... read more

Javascript : Access JSON data example

29th October 2016

Problem:

You have a JSON string such as below and you want to access the data individually via Javascript. How….... read more

Golang : Command line ticker to show work in progress

29th October 2016

Problem:

Your command line application is crunching data and you want your program to show the user that it is….... read more

Golang : Activate web camera and broadcast out base64 encoded images

29th October 2016

For this tutorial, we will learn how to activate web camera with Golang + OpenCV and stream out base64 encoded….... read more

Golang : Save webcamera frames to video file

29th October 2016

This tutorial will show you how to save image frames captured by a web camera and store the images into….... read more

Golang : Check if one string(rune) is permutation of another string(rune)

27th October 2016

Problem:

You need to check if a given input string or rune is actually a permutation of another string(rune). For….... read more

Golang : Simple image viewer with Go-GTK

26th October 2016

This is a really simple command line image viewer program written in Golang. Instead of viewing images with Photoshop or….... read more

Golang : Integer is between a range

26th October 2016

Problem:

You need to check if a given integer is in between a range of integer. How to do that?

….... read more

Golang : Sieve of Eratosthenes algorithm

26th October 2016

For this tutorial, we will learn about sieve of Eratosthenes algorithm. Sieve of Eratosthenes is an algorithm for generating all….... read more

Golang : Edge detection with Sobel method

26th October 2016

Ability to detect edges and lines in a picture is the foundation for computer vision or better known in computer….... read more

Golang : Find relative luminance or color brightness

24th October 2016

Problem:

You need to find the relative luminance (brightness or perceived brightness) of a color to another color. You also….... read more

Golang : Create new color from command line parameters

24th October 2016

Problem:

You want to create a new color base on given RGBA parameters/arguments from command line. How to do that?

….... read more

Golang : Underscore string example

23rd October 2016

Problem:

Your program needs to process data with whitespaces and quotes. You need a quick way to remove underscore characters….... read more

Golang : Temperatures conversion example

21st October 2016

Writing this down for my own future reference. Need these temperature conversions for developing an agriculture IoT application. This simple….... read more

Golang : Measure execution time for a function

18th October 2016

Ok, this is another way to measure execution time of a Golang function. This method uses defer and produce a….... read more