コード例 #1
0
        /// <summary>
        /// 底片效果(反色)
        /// </summary>
        /// <param name="bmp"></param>
        /// <returns></returns>
        public static Bitmap NegativeImage(Bitmap bmp)
        {
            int    height = bmp.Height;
            int    width  = bmp.Width;
            Bitmap newbmp = new Bitmap(width, height);

            LockBitmap lbmp    = new LockBitmap(bmp);
            LockBitmap newlbmp = new LockBitmap(newbmp);

            lbmp.LockBits();
            newlbmp.LockBits();

            Color pixel;

            for (int x = 1; x < width; x++)
            {
                for (int y = 1; y < height; y++)
                {
                    int r, g, b;
                    pixel = lbmp.GetPixel(x, y);
                    r     = 255 - pixel.R;
                    g     = 255 - pixel.G;
                    b     = 255 - pixel.B;
                    newlbmp.SetPixel(x, y, Color.FromArgb(r, g, b));
                }
            }
            lbmp.UnlockBits();
            newlbmp.UnlockBits();
            return(newbmp);
        }
コード例 #2
0
        //浮雕
        public static Bitmap EmbossmentImage(Bitmap bmp)
        {
            int    height = bmp.Height;
            int    width  = bmp.Width;
            Bitmap newbmp = new Bitmap(width, height);

            LockBitmap lbmp    = new LockBitmap(bmp);
            LockBitmap newlbmp = new LockBitmap(newbmp);

            lbmp.LockBits();
            newlbmp.LockBits();

            Color pixel1, pixel2;

            for (int x = 0; x < width - 1; x++)
            {
                for (int y = 0; y < height - 1; y++)
                {
                    int r = 0, g = 0, b = 0;
                    pixel1 = lbmp.GetPixel(x, y);
                    pixel2 = lbmp.GetPixel(x + 1, y + 1);
                    r      = Math.Abs(pixel1.R - pixel2.R + 128);
                    g      = Math.Abs(pixel1.G - pixel2.G + 128);
                    b      = Math.Abs(pixel1.B - pixel2.B + 128);
                    if (r > 255)
                    {
                        r = 255;
                    }
                    if (r < 0)
                    {
                        r = 0;
                    }
                    if (g > 255)
                    {
                        g = 255;
                    }
                    if (g < 0)
                    {
                        g = 0;
                    }
                    if (b > 255)
                    {
                        b = 255;
                    }
                    if (b < 0)
                    {
                        b = 0;
                    }
                    newlbmp.SetPixel(x, y, Color.FromArgb(r, g, b));
                }
            }
            lbmp.UnlockBits();
            newlbmp.UnlockBits();
            return(newbmp);
        }
コード例 #3
0
        /// <summary>
        /// 图片黑白处理
        /// </summary>
        /// <param name="bmp"></param>
        /// <param name="type"></param>
        /// <returns></returns>
        public static Bitmap GrayImage(Bitmap bmp, int type)
        {
            int    height = bmp.Height;
            int    width  = bmp.Width;
            Bitmap newbmp = new Bitmap(width, height);

            LockBitmap lbmp    = new LockBitmap(bmp);
            LockBitmap newlbmp = new LockBitmap(newbmp);

            lbmp.LockBits();
            newlbmp.LockBits();

            Color pixel;

            for (int x = 0; x < width; x++)
            {
                for (int y = 0; y < height; y++)
                {
                    pixel = lbmp.GetPixel(x, y);
                    int r, g, b, Result = 0;
                    r = pixel.R;
                    g = pixel.G;
                    b = pixel.B;
                    switch (type)
                    {
                    case 0:    //平均值法
                        Result = ((r + g + b) / 3);
                        break;

                    case 1:    //最大值法
                        Result = r > g ? r : g;
                        Result = Result > b ? Result : b;
                        break;

                    case 2:    //加权平均值法
                        Result = ((int)(0.3 * r) + (int)(0.59 * g) + (int)(0.11 * b));
                        break;
                    }
                    newlbmp.SetPixel(x, y, Color.FromArgb(Result, Result, Result));
                }
            }
            lbmp.UnlockBits();
            newlbmp.UnlockBits();
            return(newbmp);
        }