C# looking for libraries/classes for fast-performing filter overlay

Question

C# looking for libraries/classes for fast-performing filter overlay

I apply filters to the incoming image with the request, and then send it back I process all this now using Bitmap, very convenient, but the performance suffers greatly. Are there any libraries/classes specifically for this purpose?

Converting from an incoming stream to an image

var Picture = new Bitmap(listenerContext.Request.InputStream);

Iterate over the pixels to set a new color. The GetPixel method is low-performance (as it seems to me)

for (int x = 0; x < bmp.Width; x++)
    for (int y = 0; y < bmp.Height; y++) {
        var temp = bmp.GetPixel(x,y);
        bmp.SetPixel(x,y, Color.FromArgb(temp.A,temp.R,temp.G,temp.B));
    }

Saving an image in response per request

Picture.Save(listenerContext.Response.OutputStream, ImageFormat.Png);

3

c#изображения потоки-данных bitmap

Author: StriBog, 2018-02-02

Source

1 answers

score 2 · Accepted Answer

I think the easiest way is to use FastBitmap, for example like this:

using(var fastBitmap = bitmap.FastLock())
{
    fastBitmap.SetPixel(1, 1, Color.Red);//что-то делаем
};

Which is minimally different from using the usual Bitmap; moreover, you do not need a reverse converter-when working, it changes the existing Bitmap on which it was created.