求教C#中大图拼接方法

lyjxrw1990 2013-08-27 01:13:56

我想把76*76张256*256像素的图片拼成一张大图。
我的想法是1、按列拼成76张宽256，高256*76的图，2、再将这76章图拼在一起。
现在第一步代码如下。出现的问题总是这2个：1、BitmapData newBD = newMap.LockBits(new Rectangle(0, 0, maxW, firstH + secondH), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);这句显示内存不足；2、第1个问题前一句：newMap = new Bitmap(maxW, firstH + secondH);参数无效。
请各位帮助。



using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Drawing.Imaging;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;



namespace 图片拼接

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        string[,] picID = new string[76, 76];

        Bitmap[,] pics = new Bitmap[76, 76];

        Bitmap[] bbb = new Bitmap[76];

        string path = "D:\\编程实验\\62535\\";

        private void button1_Click(object sender, EventArgs e)

        {

            Bitmap firstmap = null;

            Bitmap secondmap = null;

            for (int i = 0; i < 76; i++)

            {

                //初始化第一张图、、、、、、、、、、、、、、、、、、、、、、、、

                string FullName1 = path + picID[i, 0] + ".jpg";

                FileInfo fi1 = new FileInfo(FullName1);

                if (fi1.Length < 50) //fillinfo.length的单位是字节

                {

                    //将空的图补充为黑底图

                    Bitmap newmap = new Bitmap(256, 256);

                    Graphics g = Graphics.FromImage(newmap);

                    //清除画布,背景设置为黑色

                    g.Clear(System.Drawing.Color.Black);

                    g.Dispose();

                    newmap.Save(FullName1);

                }

                pictureBox1.Image = Image.FromFile(FullName1);

                firstmap = new Bitmap(pictureBox1.Image);

                //初始化第一张图、、、、、、、、、、、、、、、、、、、、、、、、



                for (int j = 0; j < 76; j++)

                {

                    //初始化第二张图、、、、、、、、、、、、、、、、、、、、、、、、

                    string FullName2 = path + picID[i, j] + ".jpg";

                    FileInfo fi2 = new FileInfo(FullName2);

                    if (fi2.Length < 50) //fillinfo.length的单位是字节

                    {

                        //将空的图补充为黑底图

                        Bitmap newmap = new Bitmap(256, 256);

                        Graphics g = Graphics.FromImage(newmap);

                        //清除画布,背景设置为黑色

                        g.Clear(System.Drawing.Color.Black);

                        g.Dispose();

                        newmap.Save(FullName2);

                    }

                    pictureBox2.Image = Image.FromFile(FullName2);

                    secondmap = new Bitmap(pictureBox2.Image);

                    //初始化第二张图、、、、、、、、、、、、、、、、、、、、、、、、





                    Bitmap aaa = MergeImageVertical(secondmap, firstmap);

                    firstmap = aaa;

                }

                Bitmap result = firstmap;

                firstmap = null;

                secondmap = null;

                if (result != null)

                {

                    result.Save(path + (25266 + i).ToString() + ",9383.png", System.Drawing.Imaging.ImageFormat.Png);

                }

                result = null;

                //MessageBox.Show(i.ToString());

            }

            MessageBox.Show("finish!");

        }



        private void Form1_Load(object sender, EventArgs e)

        {

            for (int i = 0; i < 76; i++) 

            {

                for (int j = 0; j < 76; j++)

                {

                    picID[i, j] = (25266 + i).ToString() + "," + (9383 + j).ToString();

                }

            }

        }



/// <summary>

        /// 将两张图片沿垂直方向进行拼接

        /// </summary>

        /// <param name="firstMap"></param>

        /// <param name="secondMap"></param>

        /// <returns></returns>

        private Bitmap MergeImageVertical(Bitmap firstMap, Bitmap secondMap)

        {

            Bitmap newMap = null;

            int firstW, firstH, secondW, secondH;

            firstW = firstMap.Width;

            firstH = firstMap.Height;

            secondW = secondMap.Width;

            secondH = secondMap.Height;



            BitmapData firstBD =

            firstMap.LockBits(new Rectangle(0, 0, firstW, firstH),

            ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);

            BitmapData secondBD =

            secondMap.LockBits(new Rectangle(0, 0, secondW, secondH),

            ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);



            int firstStride = firstBD.Stride;

            int secondStride = secondBD.Stride;

            System.IntPtr firstScan0 = firstBD.Scan0;

            System.IntPtr secondScan0 = secondBD.Scan0;



            int maxW = firstW;

            if (maxW < secondW)

                maxW = secondW;

            newMap = new Bitmap(maxW, firstH + secondH);

            BitmapData newBD =

            newMap.LockBits(new Rectangle(0, 0, maxW, firstH + secondH),

            ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);

            System.IntPtr newScan0 = newBD.Scan0;

            unsafe

            {

                int newMapStride = newBD.Stride;

                byte* pFirst = (byte*)(void*)firstScan0;

                byte* pSecond = (byte*)(void*)secondScan0;

                byte* pNew = (byte*)(void*)newScan0;

                int x, y, temp3W, tempYStride, tempYNewMapStride;

                byte temp1;

                //写入上边图像

                temp3W = 3 * firstW;

                for (y = 0; y < firstH; y++)

                {

                    tempYStride = y * firstStride;

                    tempYNewMapStride = y * newMapStride;

                    for (x = 0; x < temp3W; x++)

                    {

                        temp1 = pFirst[x + tempYStride];

                        pNew[x + tempYNewMapStride] = temp1;

                    }

                }



                //写入下边图像

                temp3W = 3 * secondW;

                for (y = 0; y < secondH; y++)

                {

                    tempYStride = y * secondStride;

                    tempYNewMapStride = (y + firstH) * (newMapStride);

                    for (x = 0; x < temp3W; x++)

                    {

                        temp1 = pSecond[x + tempYStride];

                        pNew[x + tempYNewMapStride] = temp1;

                    }

                }

                newMap.UnlockBits(newBD);

            }



            firstMap.UnlockBits(firstBD);

            secondMap.UnlockBits(secondBD);



            return newMap;

        }

   }

}