Replace square pixel with round dot pixel

[inkedGFX]

I am attempting to do some image processing operations....what I want to do is take in a bitmap and replace the square pixel with a round dot pixel....I can iterate the bitmap and get the pixel color, brightness and replace them with another color...but would like to know how to change the shape of the pixel....

this is what I have so far:

 Bitmap testImg = (Bitmap)Image.FromFile(AppDomain.CurrentDomain.BaseDirectory +[URL="file://\\Assets\\Images\\Seps\\yellow_sep.png"]\\Assets\\Images\\Seps\\yellow_sep.png[/URL]);
            Bitmap result = new Bitmap(testImg.Width , testImg.Height);
            Graphics g = Graphics.FromImage(result);
            for (int i = 0; i < testImg.Width; i++)
            {
                for (int y = 0; y < testImg.Height; y++)
                {
                    Color c = testImg.GetPixel(i, y);
                    var brightness = Brightness(c);

                    if (c == Color.FromArgb((int)brightness, (int)brightness, (int)brightness, (int)brightness))
                    {
                       
                       
                        Pen dot = new Pen(Color.FromArgb((int)brightness, 0,0,0), 1F);
                        result.SetPixel(i, y, dot.Color);
                       
                        g = pictureBox2.CreateGraphics();
                        g.DrawEllipse(dot, i, y, 4, 4);
                        
                    }
                    else
                    {
                        Pen dot = new Pen(Color.FromArgb((int)brightness, 255,255,255), 1F);
                        result.SetPixel(i, y, dot.Color);
                        g = pictureBox2.CreateGraphics();
                        g.DrawEllipse(dot, i, y, 4, 4);
                        
                    }
                    
                }
            }

private float Brightness(Color c)
        {
            return (float)Math.Sqrt(
                c.R * c.R * .241 +
                c.G * c.G * .691 +
                c.B * c.B * .068);
        }

Any help would be appreciated

-InkedGFX

 

[jmcilhinney]

You can't change the shape of a pixel. A pixel is whatever shape the medium used to display the image decides it is. On a computer screen, that's generally going to be square while on a printer it may be round. The image itself doesn't contain any specific information about that.

 

[inkedGFX]

Thank You For Your Reply!

-InkedGFX