C# :HImage转Mat方法

@作死星人2025-05-26 11:34

原来网上查过HImage转Mat的方式，本来想直接copy，奈何查到的总有不完美的地方，且最近还从之前的代码发现了bug后改掉了。

这段代码测试后可用，直接分享出来。

我的halcon版本是 17.12 后面新版本是否使用可以同步留言。

OpenCV是用的C# nugget包下拉的，这个根据个人.net Framework 版本做调整就好

csharp 复制代码

 public Mat HImageToMat(HImage hImage)
 {
     try
     {
         Mat mImage;
         HTuple htChannels;
         HOperatorSet.CountChannels(hImage, out htChannels);

         if (htChannels.Length == 0 || (htChannels[0].I != 1 && htChannels[0].I != 3))
             return null;

         HTuple width, height;
         hImage.GetImageSize(out width, out height);

         // 处理单通道图像
         if (htChannels[0].I == 1)
         {
             HTuple ptr, type;
             HOperatorSet.GetImagePointer1(hImage, out ptr, out type, out _, out _);

             MatType cvType = GetCvType(type);
             mImage = new Mat(height, width, cvType);

             unsafe
             {
                 byte* srcPtr = (byte*)ptr.IP;
                 int step = (int)mImage.Step();
                 for (int row = 0; row < height; row++)
                 {
                     Buffer.MemoryCopy(
                         srcPtr + row * width,
                         mImage.DataPointer + row * step,
                         step,
                         width
                     );
                 }
             }
             return mImage;
         }
         // 处理三通道图像
         else
         {
             HTuple ptrR, ptrG, ptrB, type;
             HOperatorSet.GetImagePointer3(hImage, out ptrR, out ptrG, out ptrB, out type, out _, out _);

             MatType cvType = GetCvType(type);
             Mat[] channels = new Mat[3]
             {
                 new Mat(height, width, cvType), // B
                 new Mat(height, width, cvType), // G
                 new Mat(height, width, cvType)  // R
             };

             unsafe
             {
                 // 复制数据到各通道 (Halcon: R-G-B → OpenCV: B-G-R)
                 CopyChannel(ptrB, channels[0], width, height); // B
                 CopyChannel(ptrG, channels[1], width, height); // G
                 CopyChannel(ptrR, channels[2], width, height); // R
             }

             mImage = new Mat();
             Cv2.Merge(channels, mImage);

             foreach (var channel in channels)
                 channel.Dispose();

             return mImage;
         }
     }
     catch (Exception ex)
     {
         throw new Exception("HImage转Mat失败", ex);
     }
 }

That 's all . Thank you.