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  • BitmapData处理图像例子【逆反处理】

    原文发布时间为:2009-01-16 —— 来源于本人的百度文章 [由搬家工具导入]

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Text;
    using System.Windows.Forms;

    using System.Drawing.Imaging;
    namespace neicun
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }

            private void button1_Click(object sender, EventArgs e)
            {
                Bitmap m_Bmp = new Bitmap("d:\nvhai.bmp");//锁定位图像素
                int h = m_Bmp.Height;
                int w = m_Bmp.Width;

                Bitmap bmpOut = new Bitmap(w, h, PixelFormat.Format24bppRgb);

                BitmapData dataIn = m_Bmp.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
                BitmapData dataOut = bmpOut.LockBits(new Rectangle(0, 0, w, h), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);

                unsafe
                {
                    byte* pIn = (byte*)(dataIn.Scan0.ToPointer());
                    byte* pOut = (byte*)(dataOut.Scan0.ToPointer());

                    for (int y = 0; y < dataIn.Height; y++)
                    {
                        for (int x = 0; x < dataIn.Width; x++)
                        {

                            pOut[0] = (byte)(255 - pIn[0]);
                            pOut[1] = (byte)(255 - pIn[1]);
                            pOut[2] = (byte)(255 - pIn[2]);

                            pIn += 3;
                            pOut += 3;
                        }

                        pIn += dataIn.Stride - dataIn.Width * 3;
                        pOut += dataOut.Stride - dataOut.Width * 3;
                    }
                }

                bmpOut.UnlockBits(dataOut);
                m_Bmp.UnlockBits(dataIn);
                pictureBox1.Image = bmpOut;
            }
        }
    }

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  • 原文地址:https://www.cnblogs.com/handboy/p/7148489.html
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