Processing on large bitmaps (up to 3GB)

Question

I\'m working on some university project and got stuck with memory issue. I load a bitmap which takes about 1,5GB on HDD with code below:

Bitmap bmp = new Bi         


        

Answer 1

Consider using Memory Mapped Files to access your HUGE data :). An example focused on what you need can be found here: http://visualstudiomagazine.com/articles/2010/06/23/memory-mapped-files.aspx It's in managed code but you might as well use it from equivalent native code.

Let me know if you need more details.

Answer 2

You can stop memory caching.

Instead of

Bitmap bmp = new Bitmap(pathToFile);

Use

var bmp = (Bitmap)Image.FromStream(sourceFileStream, false, false);

see https://stackoverflow.com/a/47424918/887092

Answer 3

You can use this solution , Work with bitmaps faster in C# http://www.codeproject.com/Tips/240428/Work-with-bitmap-faster-with-Csharp

Or you can use memory mapped files

http://visualstudiomagazine.com/articles/2010/06/23/memory-mapped-files.aspx