C#图像处理(收集处理方法)

// 柔化效果
        public Bitmap SmoothEffect(Bitmap bmpSource)
        {
            Color c = new Color();
            Color c1 = new Color();
            Bitmap bmp1 = new Bitmap(bmpSource);
            Bitmap bmp2 = new Bitmap(bmpSource);
            int i, j, xres, yres, rx, gx, bx;

            xres = bmpSource.Width;
            yres = bmpSource.Height;
            for (i = 1; i < xres - 1; i++)//边界像素无法平均
            {
                for (j = 1; j < yres - 1; j++)
                {
                    //３＊３像素平均
                    rx = gx = bx = 0;
                    for (int k1 = -1; k1 <= 1; k1++)
                    {
                        for (int k2 = -1; k2 <= 1; k2++)
                        {
                            c = bmp1.GetPixel(i + k1, j + k2);
                            rx += c.R;
                            gx += c.G;
                            bx += c.B;
                        }
                    }
                    rx /= 9;
                    gx /= 9;
                    bx /= 9;

                    if (rx < 0) rx = 0;
                    if (rx > 255) rx = 255;
                    if (gx < 0) gx = 0;
                    if (gx > 255) gx = 255;
                    if (bx < 0) bx = 0;
                    if (bx > 255) bx = 255;

                    c1 = Color.FromArgb(rx, gx, bx);
                    bmp2.SetPixel(i, j, c1);
                }
            }
            return bmp2;
        }

        //单色处理
        public Bitmap ColorOnly(int colorID, Bitmap bmpSource)
        {

            Color c = new Color();
            Color c1 = new Color();
            Bitmap bmp1 = new Bitmap(bmpSource);
            Bitmap bmp2 = new Bitmap(bmpSource);
            int i, j, xres, yres;

            xres = bmpSource.Width;
            yres = bmpSource.Height;
            for (i = 0; i <= xres - 1; i++)
            {
                for (j = 0; j <= yres - 1; j++)
                {
                    c = bmp1.GetPixel(i, j);
                    switch (colorID)
                    {
                        case 1://R单色
                            c1 = Color.FromArgb(c.R, c.R, c.R);
                            break;
                        case 2://G单色
                            c1 = Color.FromArgb(c.G, c.G, c.G);
                            break;
                        case 3: //B单色
                            c1 = Color.FromArgb(c.B, c.B, c.B);
                            break;
                        case -1://反色处理（底片效果显示图像）
                            c1 = Color.FromArgb(255 - c.R, 255 - c.G, 255 - c.B);
                            break;
                        default:
                            break;
                    }
                    bmp2.SetPixel(i, j, c1);
                }
            }
            return bmp2;
        }

        //霓虹效果
        public Bitmap NeonEffect(Bitmap bmpSource)
        {
            Color c = new Color();
            Color c1 = new Color();
            Color c2 = new Color();
            Bitmap bmp1 = new Bitmap(bmpSource);
            Bitmap bmp2 = new Bitmap(bmpSource);
            int i, j, xres, yres, rx, gx, bx;

            xres = bmpSource.Width;
            yres = bmpSource.Height;
            for (i = 0; i <= xres - 1; i++)
            {
                for (j = 0; j <= yres - 1; j++)
                {
                    rx = gx = bx = 0;
                    c = bmp1.GetPixel(i, j);
                    if (i + 1 <= xres - 1 && j + 1 <= yres - 1)
                    {
                        c1 = bmp1.GetPixel(i + 1, j);
                        c2 = bmp1.GetPixel(i, j + 1);
                        //以下计算梯度
                        rx = (int)(2 * Math.Sqrt((c.R - c1.R) * (c.R - c1.R) + (c.R - c2.R) * (c.R - c2.R)));
                        gx = (int)(2 * Math.Sqrt((c.G - c1.G) * (c.G - c1.G) + (c.G - c2.G) * (c.G - c2.G)));
                        bx = (int)(2 * Math.Sqrt((c.B - c1.B) * (c.B - c1.B) + (c.B - c2.B) * (c.B - c2.B)));

                        if (rx < 0) rx = 0;
                        if (rx > 255) rx = 255;
                        if (gx < 0) gx = 0;
                        if (gx > 255) gx = 255;
                        if (bx < 0) bx = 0;
                        if (bx > 255) bx = 255;
                        c1 = Color.FromArgb(rx, gx, bx);
                    }
                    else
                        c1 = c;
                    bmp2.SetPixel(i, j, c1);
                }
            }
            return bmp2;
        }

        //锐化效果
        public Bitmap SharpEffect(Bitmap bmpSource)
        {
            Color c = new Color();
            Color c1 = new Color();
            Bitmap bmp1 = new Bitmap(bmpSource);
            Bitmap bmp2 = new Bitmap(bmpSource);
            int i, j, xres, yres, rx, gx, bx;

            xres = bmpSource.Width;
            yres = bmpSource.Height;
            for (i = 0; i <= xres - 1; i++)
            {
                for (j = 0; j <= yres - 1; j++)
                {
                    rx = gx = bx = 0;
                    c = bmp1.GetPixel(i, j);
                    if (i - 1 >= 0 && j - 1 >= 0)
                    {
                        c1 = bmp1.GetPixel(i - 1, j - 1);

                        //以下计算新值
                        rx = c.R + Math.Abs(c.R - c1.R) / 4;
                        gx = c.G + Math.Abs(c.G - c1.G) / 4;
                        bx = c.B + Math.Abs(c.B - c1.B) / 4;
                        if (rx < 0) rx = 0;
                        if (rx > 255) rx = 255;
                        if (gx < 0) gx = 0;
                        if (gx > 255) gx = 255;
                        if (bx < 0) bx = 0;
                        if (bx > 255) bx = 255;
                        c1 = Color.FromArgb(rx, gx, bx);
                    }
                    else
                        c1 = c;
                    bmp2.SetPixel(i, j, c1);
                }
            }
            return bmp2;
        }

        //浮雕效果
        public Bitmap SculptureEffect(Bitmap bmpSource)
        {
            Color c = new Color();
            Color c1 = new Color();
            Bitmap bmp1 = new Bitmap(bmpSource);
            Bitmap bmp2 = new Bitmap(bmpSource);
            int i, j, xres, yres, rx, gx, bx;

            xres = bmpSource.Width;
            yres = bmpSource.Height;
            for (i = 0; i <= xres - 1; i++)
            {
                for (j = 0; j <= yres - 1; j++)
                {
                    rx = gx = bx = 0;
                    c = bmp1.GetPixel(i, j);
                    if (i - 1 >= 0)
                    {
                        c1 = bmp1.GetPixel(i - 1, j);

                        //以下计算新值
                        rx = c1.R - c.R + 128;
                        gx = c1.G - c.G + 128;
                        bx = c1.B - c.B + 128;
                        if (rx < 0) rx = 0;
                        if (rx > 255) rx = 255;
                        if (gx < 0) gx = 0;
                        if (gx > 255) gx = 255;
                        if (bx < 0) bx = 0;
                        if (bx > 255) bx = 255;
                        c1 = Color.FromArgb(rx, gx, bx);
                    }
                    else
                        c1 = c;
                    bmp2.SetPixel(i, j, c1);
                }
            }
            return bmp2;
        }

        //马赛克效果
        public Bitmap InlayEffect(Bitmap bmpSource)
        {
            Color c = new Color();
            Color c1 = new Color();

            Bitmap bmp1 = new Bitmap(bmpSource);
            Bitmap bmp2 = new Bitmap(bmpSource);
            int i, j, xres, yres, rx, gx, bx;

            xres = bmpSource.Width;
            yres = bmpSource.Height;
            //5*5处理
            for (i = 0; i <= xres - 1; i += 5)
            {
                for (j = 0; j <= yres - 1; j += 5)
                {
                    rx = gx = bx = 0;
                    int count = 0;
                    for (int k1 = 0; k1 <= 4; k1++)
                    {
                        for (int k2 = 0; k2 <= 4; k2++)
                        {
                            if (i + k1 <= xres - 1 && j + k2 <= yres - 1)
                            {
                                c = bmp1.GetPixel(i + k1, j + k2);
                                rx += c.R;
                                gx += c.G;
                                bx += c.B;
                                count++;
                            }
                        }
                    }
                    rx = (int)(rx / count);
                    gx = (int)(gx / count);
                    bx = (int)(bx / count);
                    if (rx < 0) rx = 0;
                    if (rx > 255) rx = 255;
                    if (gx < 0) gx = 0;
                    if (gx > 255) gx = 255;
                    if (bx < 0) bx = 0;
                    if (bx > 255) bx = 255;
                    for (int k1 = 0; k1 <= 4; k1++)
                    {
                        for (int k2 = 0; k2 <= 4; k2++)
                        {
                            if (i + k1 <= xres - 1 && j + k2 <= yres - 1)
                            {
                                c1 = Color.FromArgb(rx, gx, bx);
                                bmp2.SetPixel(i + k1, j + k2, c1);
                            }
                        }
                    }
                }
            }
            return bmp2;
        }

        //灰度处理
        public Bitmap GreyEffect(Bitmap bmpSource)
        {
            Color c = new Color();
            Color c1 = new Color();
            Bitmap bmp1 = new Bitmap(bmpSource);
            Bitmap bmp2 = new Bitmap(bmpSource);
            int i, j, xres, yres;

            xres = bmpSource.Width;
            yres = bmpSource.Height;
            for (i = 0; i <= xres - 1; i++)
            {
                for (j = 0; j <= yres - 1; j++)
                {
                    c = bmp1.GetPixel(i, j);
                    int gray = (int)(c.R * 0.3 + c.G * 0.59 + c.B * 0.11);
                    c1 = Color.FromArgb(gray, gray, gray);
                    bmp2.SetPixel(i, j, c1);
                }
            }
            return bmp2;
        }

        //透明度变换
        public Bitmap OpacityEffect(int opacityValue, Bitmap bmpSource)
        {
            int value = opacityValue;
            if (opacityValue < 0)
            {
                value = 0;
            }
            else if (opacityValue > 255)
            {
                value = 255;
            }
            Color c = new Color();
            Color c1 = new Color();
            Bitmap bmp1 = new Bitmap(bmpSource);
            Bitmap bmp2 = new Bitmap(bmpSource);
            int i, j, xres, yres;

            xres = bmpSource.Width;
            yres = bmpSource.Height;
            for (i = 0; i <= xres - 1; i++)
            {
                for (j = 0; j <= yres - 1; j++)
                {
                    c = bmp1.GetPixel(i, j);
                    c1 = Color.FromArgb(value, c.R, c.G, c.B);
                    bmp2.SetPixel(i, j, c1);
                }
            }
            return bmp2;
        }

        //旋转
        public Bitmap KiRotate(Bitmap bmp, RotateFlipType Rotate)
        {
            bmp.RotateFlip(Rotate);
            return bmp;
        }