图像校正场景一般有两种，其一由镜头本身或安装角度引起，其二是被拍摄物品本身引起

理论处理流程

我的处理处理流程

1，加载网格校正图像

2，确定符合条件的网格区域

3，显示网格鞍点

4，显示网格线

5，确定最终需要扭曲校正的图像

6，显示校正后图像

7，加载需要校正的图像

8，显示校正后图像效果

显而易见，校正后的图像在字符识别，缺陷检测，尺寸测量等方面检测效果要优于原图。

附上源码

（注意，源码仅供流程参考，在实战项目过程中，方法最好封装成类亦或者Dll文件，参数可以适当开放方便后期调试，映射关系需保存本地，软件重启需重新读取参数）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using ViewControl;
using HalconDotNet;
using System.Reflection.Emit;
using static System.Net.Mime.MediaTypeNames;
namespace DeepLearningTest1
{public partial class Form1 : Form{HalconView HW;HObject HIMage = new HObject(), ho_ImageReduced=new HObject(),ho_ConnectingLines=new HObject(), ho_Map=new HObject();HObject ho_ImageMapped =new HObject();HObject ho_GridRegion;HTuple  hv_Row = new HTuple(), hv_Col = new HTuple();public Form1(){InitializeComponent();HW = new HalconView();HW.HWindowControl.BackColor = Color.White;splitContainer1.Panel2.Controls.Add(HW);HW.Dock = DockStyle.Fill;}private void button1_Click(object sender, EventArgs e){try{OpenFileDialog openFileDialog = new OpenFileDialog();//openFileDialog.InitialDirectory = AppDomain.CurrentDomain.BaseDirectory;openFileDialog.Filter = "图片文件（*.bmp;*.jpg;*.gif;*.png;*.tiff;*.tif）|*.bmp;*.jpg;*.gif;*.png;*.tiff;*.tif";openFileDialog.RestoreDirectory = true;openFileDialog.FilterIndex = 1;if (openFileDialog.ShowDialog() == DialogResult.OK){label3.Text = openFileDialog.FileName;HOperatorSet.ReadImage(out HIMage, label3.Text);HW.DispImage(HIMage, true);}}catch (Exception ex){MessageBox.Show("加载图片失败  " + ex.ToString());}}/// <summary>/// 1 确定整流网格区域/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button2_Click(object sender, EventArgs e){if (!HIMage.IsInitialized()) { MessageBox.Show("图片为空"); return; }HOperatorSet.GenEmptyObj(out ho_GridRegion);            ho_GridRegion.Dispose();HOperatorSet.FindRectificationGrid(HIMage, out ho_GridRegion, 25,10);ho_ImageReduced.Dispose();HOperatorSet.ReduceDomain(HIMage, ho_GridRegion, out ho_ImageReduced);HW.DispObject(ho_GridRegion);}/// <summary>///2 确定网格点。/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button3_Click(object sender, EventArgs e){//---------------------2-----------------------------//确定网格点。HTuple hv_Threshold = new HTuple();HObject  ho_SaddlePoints;HOperatorSet.GenEmptyObj(out ho_SaddlePoints);hv_Row.Dispose(); hv_Col.Dispose();HOperatorSet.SaddlePointsSubPix(ho_ImageReduced, "facet", 1.5,5, out hv_Row, out hv_Col);ho_SaddlePoints.Dispose();HOperatorSet.GenCrossContourXld(out ho_SaddlePoints, hv_Row, hv_Col, 6, 0.785398);HOperatorSet.SetColor(HW.HalconWindow, "red");HW.DispObject(HIMage);HW.DispObject(ho_SaddlePoints);}/// <summary>/// 网格线区域/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button4_Click(object sender, EventArgs e){HTuple hv_SigmaConnectGridPoints = new HTuple();HTuple hv_MaxDist = new HTuple();//------------------------3------------------------//确定网格线。ho_ConnectingLines.Dispose();HOperatorSet.ConnectGridPoints(ho_ImageReduced, out ho_ConnectingLines, hv_Row, hv_Col, 0.9, 5.0);HW.DispObject(HIMage);HW.DispObject(ho_ConnectingLines);}/// <summary>/// 输出映射关系/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button5_Click(object sender, EventArgs e){HObject  ho_Meshes;HOperatorSet.GenEmptyObj(out ho_Meshes);HTuple hv_GridSpacing = new HTuple();ho_Map.Dispose(); ho_Meshes.Dispose();HOperatorSet.GenGridRectificationMap(ho_ImageReduced, 20, out ho_Map,out ho_Meshes, hv_GridSpacing, 0, hv_Row, hv_Col, "bilinear");HW.DispObject(HIMage);HW.DispObject(ho_Meshes);}/// <summary>/// 映射原图像/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button6_Click(object sender, EventArgs e){ho_ImageMapped.Dispose();HOperatorSet.MapImage(ho_ImageReduced, ho_Map, out ho_ImageMapped);HW.DispObject(ho_ImageMapped);}/// <summary>/// 加载其他图像映射/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button7_Click(object sender, EventArgs e){ho_ImageReduced.Dispose();HOperatorSet.ReduceDomain(HIMage, ho_GridRegion, out ho_ImageReduced);ho_ImageMapped.Dispose();HOperatorSet.MapImage(ho_ImageReduced, ho_Map, out ho_ImageMapped);HW.DispObject(ho_ImageMapped);}}
}