[Amin_Mansouri]

کد:

Instructions: Use:
BackgroundImage = Grayscale(new Bitmap(colorImage));

کد:

/// <summary>
        /// Convert an Image to a Grayscale Image.
        /// </summary>
        /// <param name="Bitmap">The Bitmap to Convert to Grayscale.</param>
        /// <returns>A Grayscale Image.</returns>
        public static Bitmap Grayscale(Bitmap bitmap)
        {
            //Declare myBitmap as a new Bitmap with the same Width & Height
            Bitmap myBitmap = new Bitmap(bitmap.Width, bitmap.Height);

            for (int i = 0; i < bitmap.Width; i++)
            {
                for (int x = 0; x < bitmap.Height; x++)
                {
                    //Get the Pixel
                    Color BitmapColor = bitmap.GetPixel(i, x);

                    //Declare grayScale as the Grayscale Pixel
                    int grayScale = (int)((BitmapColor.R * 0.3) + (BitmapColor.G * 0.59) + (BitmapColor.B * 0.11));

                    //Declare myColor as a Grayscale Color
                    Color myColor = Color.FromArgb(grayScale, grayScale, grayScale);

                    //Set the Grayscale Pixel
                    myBitmap.SetPixel(i, x, myColor);
                }
            }
            return myBitmap;
        }