如何检查徽标/图像是否在图像中？

Question

我想比较文档的图像与徽标类型或其他图片，以查看徽标是否在文档中。

这样做的应用程序将使用ASP.NET MVC 3和C＃。

更多搜索后我瑶池与位图的扩展，使用AForge的解决方案：

public static class BitmapExtensions 
{ 
    /// <summary> 
    /// See if bmp is contained in template with a small margin of error. 
    /// </summary> 
    /// <param name="template">The Bitmap that might contain.</param> 
    /// <param name="bmp">The Bitmap that might be contained in.</param>   
    /// <returns>You guess!</returns> 
    public static bool Contains(this Bitmap template, Bitmap bmp) 
    { 
     const Int32 divisor = 4; 
     const Int32 epsilon = 10; 

     ExhaustiveTemplateMatching etm = new ExhaustiveTemplateMatching(0.9f); 

     TemplateMatch[] tm = etm.ProcessImage(
      new ResizeNearestNeighbor(template.Width/divisor, template.Height/divisor).Apply(template), 
      new ResizeNearestNeighbor(bmp.Width/divisor, bmp.Height/divisor).Apply(bmp) 
      ); 

     if (tm.Length == 1) 
     { 
      Rectangle tempRect = tm[0].Rectangle; 

      if (Math.Abs(bmp.Width/divisor - tempRect.Width) < epsilon 
       && 
       Math.Abs(bmp.Height/divisor - tempRect.Height) < epsilon) 
      { 
       return true; 
      } 
     } 

     return false; 
    } 
} 

Answer 1

我认为你要使用模板匹配功能。我会建议使用opencv。这是similar to this question