修剪圖像（剪切以去除所有空白區域）

Question

要縮小某些圖像的尺寸，我想要去除某些圖像的白色填充。這個想法是，如果在邊界上有大面積的白色區域，那麼可以裁剪這些區域以節省一些空間。

任何想法？

Answer 1

我得到了使用

Dim MinX As Integer = W : Dim MaxX As Integer = 0 
    Dim MinY As Integer = H : Dim MaxY As Integer = 0 

    Dim White As Integer = Color.White.ToArgb() 
    For x As Integer = 0 To W - 1 
     For y As Integer = 0 To H - 1 
      If Not Output.GetPixel(x, y).ToArgb() = White Then 
       MinX = Math.Min(MinX, x) 
       MaxX = Math.Max(MaxX, x) 
       MinY = Math.Min(MinY, y) 
       MaxY = Math.Max(MaxY, y) 
      End If 
     Next 
    Next 

的裁剪邊界