快乐程序员---分享C#图像凸透镜效果--胆小的莫进哦。。。。。。

Trent1985

博客专家认证

2013-01-25 10:22:42

加精

写了一个C#实现图像凸透镜效果的小程序，有图有源码，给大家分享一下，代码尚未优化，原理清晰，图像好玩，让你做个快乐的程序员哈哈！

先看原图--效果图：

免费下载链接：
http://download.csdn.net/detail/trent1985/5027453

源代码：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Drawing.Drawing2D;



namespace IceFilter

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

            srcBitmap = new Bitmap("src.jpg");

            pictureBox1.Image = (Image)srcBitmap;

        }

        private static Bitmap srcBitmap = null;

        private static int count = 0;

        private static Bitmap ConvexFilterProcess(Bitmap srcBitmap, int radius, int cenX, int cenY)

        {

            Bitmap a = new Bitmap(srcBitmap);

            int w = a.Width;

            int h = a.Height;

            double distance = 0.0;

            double dis = 0.0;

            if (radius > cenX || radius > cenY)

            {

                radius = Math.Min(cenX, cenY);

            }

            Bitmap dst = new Bitmap(w, h);

            System.Drawing.Imaging.BitmapData srcData = a.LockBits(new Rectangle(0, 0, w, h), System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);

            System.Drawing.Imaging.BitmapData dstData = dst.LockBits(new Rectangle(0, 0, w, h), System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);

            unsafe

            {

                byte* pIn = (byte*)srcData.Scan0.ToPointer();

                byte* pOut = (byte*)dstData.Scan0.ToPointer();

                byte* p = (byte*)srcData.Scan0.ToPointer();

                int sWidth = srcData.Stride;

                int stride = sWidth - w * 3;

                int R, G, B;

                int newX = 0, newY = 0;

                for (int y = 0; y < h; y++)

                {

                    for (int x = 0; x < w; x++)

                    {

                        B = pIn[0];

                        G = pIn[1];

                        R = pIn[2];

                        distance = (x - cenX) * (x - cenX) + (y - cenY) * (y - cenY);

                        dis = Math.Sqrt(distance);

                        if (distance <= radius * radius&&distance>0)

                        {

                            newX = (int)Math.Floor(dis * (double)(x - cenX) / (double)radius + (double)cenX);

                            newY = (int)Math.Floor(dis * (double)(y - cenY) / (double)radius + (double)cenY);

                            pOut[0] = (byte)(*(p + newX * 3 + newY * srcData.Stride));

                            pOut[1] = (byte)(*(p + newX * 3 + 1 + newY * srcData.Stride));

                            pOut[2] = (byte)(*(p + newX * 3 + 2 + newY * srcData.Stride));

                        }

                        else

                        {

                            pOut[0] = (byte)B;

                            pOut[1] = (byte)G;

                            pOut[2] = (byte)R;

                        }

                        pIn += 3;

                        pOut += 3;

                    }

                    pIn += stride;

                    pOut += stride;

                }

                a.UnlockBits(srcData);

                dst.UnlockBits(dstData);

            }

            return dst;



        }



        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)

        {

            if(e.X<srcBitmap.Width&&e.X>0&&e.Y<srcBitmap.Height&&e.Y>0)

            {

               pictureBox1.Image = (Image)ConvexFilterProcess(srcBitmap, 50, e.X, e.Y);

            }            



        }



        private void pictureBox1_MouseDown(object sender, MouseEventArgs e)

        {

            pictureBox1.Image.Save(count.ToString() + ".jpg");

            count++;

        }



       

    }

          

       

}