Question

How can I get bits per pixel in bitmap image? example if pixel x=24 & y=45 has RGB 123,212,112 so it must return 1111011, 11010100, 1110000.

Answer 1

Your problem is not specific to pixels, basically need to get bits for the bytes:

You can use a static extension:

    public static string ToBitString(this byte b)
    {
        StringBuilder sb = new StringBuilder(8);
        for (int i = 7; i >= 0; i--)
        {
            sb.Append((b & (1 << i)) > 0 ? '1' : '0');
        }
        return sb.ToString();
    }

And use:

        byte bt = 120;
        Console.WriteLine(bt.ToBitString());
                    // outputs 01111000

In your case:

   Color c = ...;
   string s = ((byte) c.B).ToBitString();