XImage.Raster
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C# Imaging How-Tos

PM > Install-Package XImage.Raster

Get to Start Image Read & Modify Image Conversion Image Process Multi-Page Image Process Image Drawing Image Thumbnail

C# Imaging Library
How to change, modify image alpha channel in C#?


How to read, modify, update raster image alpha channel in C# asp.net core, mvc, windows forms applications?





By using the XImage.Raster SDK, you can add alpha channel to 24bpp image and convert it to 32bpp image. Conversely, you can remove 32bpp image's depth channel and convert it to 24bpp image.


How to modify image alpha channel using C#?

  1. Download XImage.Raster C# imaging library
  2. Install C# library to modify image alpha channel in .NET applications
  3. Step by Step Tutorial












Steps to Modify Alpha Channel



  • Load an image with RasterImage object.
  • Create an image processor with ImageProcess object.
  • Call the AddAlphaChannel method of ImageProcess object to complete the task flopping image.
  • Save the modified image to an image file on the disk.


Modify Alpha Channel



Sample Code (modify alpha channel): 

RasterImage img = new RasterImage(@"F:\input.png");
ImageProcess process = new ImageProcess(img);
//add alpha channel to 24bpp image.
process.AddAlphaChannel();
img.Save(@"C:\output.png">);