c# - 是否可以使用 Blob 分析删除图像的小块？

Question

我想知道 blob 究竟是什么？是否可以减少图像中的背景噪音？或者是否有可能在图像中找到最大的区域，更具体地说，如果图像只包含手部和头部片段，那么是否可以只分离手部或头部区域？ 如果这是可能的，那么也可以选择具有较大轮廓的边界，同时消除图像中的小块 ??

Suggest me, i have an image containing hand gesture only. I used skin detection technique to do so. But the problem is i have small other noises in the image that have same color as hand(SKIN). I want typical hand gestures only, with removed noises. Help me??

Answer 1

使用 example from aforge ，您有什么理由不能只清除图像中的小部分？

// create an instance of blob counter algorithm
BlobCounterBase bc = new ...
// set filtering options
bc.FilterBlobs = true;
bc.MinWidth  = 5;
bc.MinHeight = 5;
// process binary image
bc.ProcessImage( image );
Blob[] blobs = bc.GetObjects( image, false );
// process blobs
var rectanglesToClear = from blob in blobs select blob.Rectangle;

 using (var gfx = Graphics.FromImage(image))
 {
    foreach(var rect in rectanglesToClear) 
    {
        if (rect.Height < someMaxHeight && rect.Width < someMaxWidth)
            gfx.FillRectangle(Brushes.Black, rect);
    }
  gfx.Flush();
 }