VisionPro —— CogPatInspectTool对比工具

一、CogPathInspectTool工具简介

CogPathInspectTool是VisionPro重要的工具，主要用于缺陷检测，通过将当前图像与“训练图像”对比，获取“原始差异图像”，再将“原始差异图像”与“阈值图像”进行对比，进而获取“阈值差异图像”得到最终的当前图像与训练图像的差异，通常差异区域为缺陷所在。该工具通常与CogPMAlignTool工具、CogBolbTool工具进行使用。

二、主要功能

模式检测：根据图像中的特征和模式检测目标物体。
位置和角度检测：检测并识别目标物体的位置和角度。
多目标识别：支持同时检测和识别多个目标物体。
结果分析：输出检测结果的位置信息和匹配度。

三、CogPathInspectTool操作流程实例

1、配置添加图形集合添加工具块

2、获取PMA工具：通过PMA工具进行准确的模版匹配，可以对其旋转缩放的角度进行精确的匹配

添加终端

3、配置CogPathInspectTool：在VisionPro中配置CogPathInspectTool工具，连接PMA终端，设置比较模型、偏侧高度阈值等参数，以便进行特征比较和缺陷识别。

4、获取Blob工具：通过调用CogBlobTool工具，连接CogPatInspectTool输出的瑕疵图片Result.GetDifferenceImage(Absolute)

通过blob进行斑点检测

5、通过代码进行显示检测出的瑕疵，并进行显示

选择 C# Advanced Script脚本方式

脚本如下：

#region namespace imports
using System;
using System.Collections;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using Cognex.VisionPro;
using Cognex.VisionPro.ToolBlock;
using Cognex.VisionPro3D;
using Cognex.VisionPro.PMAlign;
using Cognex.VisionPro.PatInspect;
using Cognex.VisionPro.Blob;
#endregion

public class CogToolBlockAdvancedScript : CogToolBlockAdvancedScriptBase
{
  #region Private Member Variables
  private Cognex.VisionPro.ToolBlock.CogToolBlock mToolBlock;
  private CogGraphicCollection cc = new CogGraphicCollection(); // 创建图形集合 保存多个图形 例如多个label
  CogGraphicLabel label = new CogGraphicLabel();
  #endregion

  /// <summary>
  /// Called when the parent tool is run.
  /// Add code here to customize or replace the normal run behavior.
  /// </summary>
  /// <param name="message">Sets the Message in the tool's RunStatus.</param>
  /// <param name="result">Sets the Result in the tool's RunStatus</param>
  /// <returns>True if the tool should run normally,
  ///          False if GroupRun customizes run behavior</returns>
  public override bool GroupRun(ref string message, ref CogToolResultConstants result)
  {
    // To let the execution stop in this script when a debugger is attached, uncomment the following lines.
    // #if DEBUG
    // if (System.Diagnostics.Debugger.IsAttached) System.Diagnostics.Debugger.Break();
    // #endif
    cc.Clear(); // 清空集合
    CogBlobTool blob = (CogBlobTool) mToolBlock.Tools[2];
    
    //    CogBlobTool blob = new CogBlobTool();
    //    blob = (CogBlobTool) mToolBlock.Tools[2];


    // Run each tool using the RunTool function
    foreach(ICogTool tool in mToolBlock.Tools)
      mToolBlock.RunTool(tool, ref message, ref result);
    
    for(int i = 0;i < blob.Results.GetBlobs().Count;i++)
    {
      CogPolygon p = new CogPolygon(); // 创建多边形
      p = blob.Results.GetBlobs()[i].GetBoundary(); // 设置多边形边界
      p.Color = CogColorConstants.Red;
      p.LineWidthInScreenPixels = 3;
      cc.Add(p);
    }
    
    double dou = blob.Results.GetBlobs().Count;
    if(dou == 0)
    {
      label.SetXYText(20, 20, "无瑕疵");
      
    }
    else
    {
      label.SetXYText(20, 20, "有瑕疵");
    }
      
    
    

    return false;
  }

  #region When the Current Run Record is Created
  /// <summary>
  /// Called when the current record may have changed and is being reconstructed
  /// </summary>
  /// <param name="currentRecord">
  /// The new currentRecord is available to be initialized or customized.</param>
  public override void ModifyCurrentRunRecord(Cognex.VisionPro.ICogRecord currentRecord)
  {
  }
  #endregion

  #region When the Last Run Record is Created
  /// <summary>
  /// Called when the last run record may have changed and is being reconstructed
  /// </summary>
  /// <param name="lastRecord">
  /// The new last run record is available to be initialized or customized.</param>
  public override void ModifyLastRunRecord(Cognex.VisionPro.ICogRecord lastRecord)
  {
    foreach(ICogGraphic a in cc)
    {
      mToolBlock.AddGraphicToRunRecord(a, lastRecord, "CogPMAlignTool1.InputImage", "ss");
    }
    
    mToolBlock.AddGraphicToRunRecord(label, lastRecord, "CogPMAlignTool1.InputImage", "ss");
  }
  #endregion

  #region When the Script is Initialized
  /// <summary>
  /// Perform any initialization required by your script here
  /// </summary>
  /// <param name="host">The host tool</param>
  public override void Initialize(Cognex.VisionPro.ToolGroup.CogToolGroup host)
  {
    // DO NOT REMOVE - Call the base class implementation first - DO NOT REMOVE
    base.Initialize(host);


    // Store a local copy of the script host
    this.mToolBlock = ((Cognex.VisionPro.ToolBlock.CogToolBlock)(host));
  }
  #endregion

}

6、运行结果如下