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.NET: Alpha Compositing Algorithm
Choose Background Color
First, choose a background color to be used for the transparent pixels.
Apply Alpha Compositing Algorithm
The formula for alpha compositing a single pixel typically involves blending each of the RGB values of the foreground image with those of the background color based on the alpha value. The alpha value ranges from 0 (completely transparent) to 255 (completely opaque). If the alpha value ranges from 0 to 1, simply multiply it by 255.
Here it is in C# code:
float ConvertAlphaChannelToBackground(float desiredBackgroundColor, float foregroundColor, float alpha)
{
return (foregroundColor * alpha / 255) + (desiredBackgroundColor * (255 - alpha) / 255);
}
tutorial
.NET: About the System.Security.Cryptography Namespace
A general overview and explanation about hash, symmetric and asymmetric cryptography algorithms with examples available, like DES symmetric and RSA asymmetric algorithms; written in C#.
.NET: Access the Pixels of an Image Using SixLabors.ImageSharp v3.0
How to access each pixel's color information using SixLabors.ImageSharp, written in C#.
.NET: Add Comment to XML Document
Use the XmlSerializer and XmlDocument classes to add a comment to XML files; written in C#.
.NET: Alpha Compositing Algorithm
How to convert an image with an alpha channel to an image without an alpha channel; written in C#.
.NET: Call an External Function Using DllImport in C#
How to correctly use DllImport to call external functions in libraries on both windows (.dll files) and Linux (.so libraries).
.NET: CNN for Supervised Deep Learning Example in C#
An example one-dimensional and two-dimensional Convolutional Neural Network, deep learning library written in C#.
.NET: Common Activation Functions with Their Derivatives in C#
The neural network activation functions Rectified Linear Unit (ReLU), Leaky Rectified Linear Unit, Exponential Linear Unit (ELU), Hyperbolic Tangent (tanh), and Sigmoid with the derivates for each.
.NET: Convert Dictionary Keys and Values to a List
How to create a list from either the keys or the values of a dictionary in C#.
.NET: Convert Double Array to Byte Array
How to use the BitConverter class to convert an array of doubles to an array of bytes and back again; written in C#.
.NET: Convert Float Array to Byte Array
How to use the BitConverter class to convert an array of floats to an array of bytes and back again; written in C#.
.NET: Convert Int Array to Byte Array
How to use the BitConverter class to convert an array of integers (int) to an array of bytes and back again; written in C#.
.NET: Convert Number to Binary String
How to convert a number such as an int, uint, long, ulong or other integer to a binary string using C#.
.NET: Create, Read from and Write to Processes
Examples of creating processes and how to read console output and write to a console using the System.Diagnostics.Process class and use Windows Management Instrumentation (WMI) to create processes on remote machines; written in C# and VB.NET.
.NET: Crop Image to Square using SixLabors.ImageSharp v3.0
Use SixLabors.ImageSharp to crop an image to a square, written in C#.
.NET: Double to String Conversion Without Scientific Notation
How to print double values without using scientific notation, in C#.
.NET: Download any Type of File Data from a URL with HttpClient
Download a file from an Internet URL/URI using the HttpClient class; written in C#.
.NET: Extract the Page Title from HTML
How to find the title in an HTML page using regular expressions (RegEx) in C#.
.NET: Find Keywords in Text using Regex
How to find a keyword in text using C# and regular expressions.
.NET: Find the Index Value When Using LINQ Select()
How to know the current index value of an item when using the Language Integrated Query Select() method; example in C#.
.NET: Globally Unique Identifiers
The GUID is great for anything requiring uniqueness; examples in C# and VB.NET.
.NET: Hash-based Message Authentication Code
Safely store user passwords, written in C#.
.NET: How to Create WordPress Slugs
Use C# regular expressions (Regex) to create slugs with only standard characters for use in a URL or other purpose.
.NET: How to Randomize the Order of a List and Optional Parallel List
Using C#, randomize or shuffle a list, and optionally, a second, parallel list.
.NET: Image Utility for SixLabors.ImageSharp v1.0
Manipulate images on Windows, Linux and MacOS machines including creating a scatter plot and histogram, and rotating the images as needed to display properly with a C# console application example.
.NET: Image Utility for SixLabors.ImageSharp v3.0
Manipulate images on Windows, Linux and MacOS machines including creating a scatter plot and histogram, and rotating the images as needed to display properly with a C# console application example.
.NET: Is a Number a Power of Two (2)
How to check or determine if a number has a base of 2 without using modulo operations for maximum performance; written in C#.
.NET: Join/Merge Two List, Array or Enumerable (IEnumerable) Objects
How to combine Lists, Arrays or Enumerables and, optionally, make them unique or distinct using C#.
.NET: Kill or End a Process
How to terminate a process using C#.
.NET: Lazy Load Data
How to lazy load data using the C# programming language.
.NET: Machine Learning, Unsupervised Learning or Clustering, K-mean / Silhouette Clustering Library
An example of a machine learning library, or utility, written in C#.
.NET: Memory-Mapped Files
Memory-mapped files allow sharing large amounts of data between processes; they are explored here with examples in C#.
.NET: Mersenne Twister Random Number Generation
A popular Mersenne Twister pseudo random number generator example written in C#.
.NET: Multi-threading with Tasks
How to multi-thread using the Task class in C#.
.NET: Neural Network, Supervised Deep Machine Learning Example in C#
An example neural network, deep learning library written in C#; categorizes practically any data as long as it is properly normalized.
.NET: Nvidia CUDA for CSharp (v1.0.1 - Linux Edition)
Access Nvidia CUDA functionality from the C# language (as well as VB.NET) on a Linux x64 machine using this simple wrapper library.
.NET: Nvidia CUDA for CSharp (v1.0.1)
Access Nvidia CUDA functionality from the C# language (as well as VB.NET) on Windows 64-bit (x64) using this simple wrapper library.
.NET: Operating System Detection
How to detect if the operating system is Linux, MacOS or Windows using C#.
.NET: Power Status - AC/DC
How to detect the DC/battery operation or AC/plugged-in operation of the computer using C#.
.NET: Retrieve the Executable's Path and Directory
How to find the .NET executable's path and directory.
.NET: Reverse Geocode
Use latitude and longitude to reverse-geocode to country, US state/Canadian province and time zone in a .NET application all while offline; written in C#.
.NET: Sort a List of Objects with a Delegate Function
How to use a delegate to sort a C# List Holding Objects Instead of Primitive Types.
.NET: Strip/Remove HTML SCRIPT Tags from Text Using Regex
How to remove the SCRIPT tag and its containing code from HTML text using C# and regular expressions.
.NET: Strip/Remove HTML Tags from Text Using Regex
How to remove the tags from HTML text using C# and regular expressions.
.NET: Use Callback Function with Windows API
How to use a callback function with the Windows API or any C/C++ DLL that exports a function requiring a callback function as a parameter in C#.
.NET: Using Brotli to Compress and Decompress Data
How to use the BrotliStream class to compress and decompress bytes, files or streams of data in C#.
.NET: Using GZip to Compress and Decompress Data
How to use the GZipStream class to compress and decompress bytes, files and streams of data in C#.
.NET: What's New or Changed in C# 6
A guide to the changes and additions in C# version 6.
.NET: What's New or Changed in C# 7
A guide to the changes and additions in C# version 7.
.NET: Working with Arrays
How to sort and work with parallel arrays in C#.
.NET: Working with Dates
Working with the Date object and the TimeSpan object written in C#.
.NET: Working with Strings
The StringBuilder class versus String.Format() plus common formatting parameters for dates and numbers written in C#.
.NET: Working with Threads
How to use the Thread class in C#.
.NET: XmlSerializer Example
Serialize and deserialize objects to XML strings using C#.
