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  • vb.net 教程 5-16 图像处理之ImageAttributes 类2 颜色矩阵3

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继续上一节的讲解，看看之前 《vb.net 教程 5-16 图像处理之ImageAttributes 类1 颜色矩阵1》中讲到的其他几个特殊矩阵的使用。
 
    '仅绿色分量
    Private Sub Button11_Click(sender As Object, e As EventArgs) Handles Button11.Click
        Dim imageAttributes As New ImageAttributes()
        '仅绿色分量
        Dim imgMatrixElement()() As Single = {
          New Single() {0, 0, 0, 0, 0},
          New Single() {0, 1, 0, 0, 0},
          New Single() {0, 0, 0, 0, 0},
          New Single() {0, 0, 0, 1, 0},
          New Single() {0, 0, 0, 0, 0}
        }
 
        Dim imgMatrix As New ColorMatrix(imgMatrixElement)
        imageAttributes.SetColorMatrix(imgMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap)
 
        Dim destImg As New Bitmap(sourceImg.Width, sourceImg.Height)
        Dim g As Graphics = Graphics.FromImage(destImg)
        g.DrawImage(sourceImg, New Rectangle(0, 0, sourceImg.Width, sourceImg.Height), 0, 0, sourceImg.Width, sourceImg.Height,
                    GraphicsUnit.Pixel, imageAttributes)
 
        picDest.Image = destImg
    End Sub
 
 
 
 
    '仅蓝色分量
    Private Sub Button12_Click(sender As Object, e As EventArgs) Handles Button12.Click
        Dim imageAttributes As New ImageAttributes()
        '仅蓝色分量
        Dim imgMatrixElement()() As Single = {
          New Single() {0, 0, 0, 0, 0},
          New Single() {0, 0, 0, 0, 0},
          New Single() {0, 0, 1, 0, 0},
          New Single() {0, 0, 0, 1, 0},
          New Single() {0, 0, 0, 0, 0}
        }
 
        Dim imgMatrix As New ColorMatrix(imgMatrixElement)
        imageAttributes.SetColorMatrix(imgMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap)
 
        Dim destImg As New Bitmap(sourceImg.Width, sourceImg.Height)
        Dim g As Graphics = Graphics.FromImage(destImg)
        g.DrawImage(sourceImg, New Rectangle(0, 0, sourceImg.Width, sourceImg.Height), 0, 0, sourceImg.Width, sourceImg.Height,
                    GraphicsUnit.Pixel, imageAttributes)
 
        picDest.Image = destImg
    End Sub
 
 
 
 
    '灰度：指数加权法
    Private Sub Button13_Click(sender As Object, e As EventArgs) Handles Button13.Click
        Dim imageAttributes As New ImageAttributes()
        '灰度
        Dim imgMatrixElement()() As Single = {
          New Single() {0.3, 0.3, 0.3, 0, 0},
          New Single() {0.59, 0.59, 0.59, 0, 0},
          New Single() {0.11, 0.11, 0.11, 0, 0},
          New Single() {0, 0, 0, 1, 0},
          New Single() {0, 0, 0, 0, 0}
        }
 
        Dim imgMatrix As New ColorMatrix(imgMatrixElement)
        imageAttributes.SetColorMatrix(imgMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap)
 
        Dim destImg As New Bitmap(sourceImg.Width, sourceImg.Height)
        Dim g As Graphics = Graphics.FromImage(destImg)
        g.DrawImage(sourceImg, New Rectangle(0, 0, sourceImg.Width, sourceImg.Height), 0, 0, sourceImg.Width, sourceImg.Height,
                    GraphicsUnit.Pixel, imageAttributes)
 
        picDest.Image = destImg
    End Sub
 
 
 
 
 
 
    '逆反
    Private Sub Button14_Click(sender As Object, e As EventArgs) Handles Button14.Click
        Dim imageAttributes As New ImageAttributes()
        '逆反
        Dim imgMatrixElement()() As Single = {
          New Single() {-1, 0, 0, 0, 0},
          New Single() {0, -1, 0, 0, 0},
          New Single() {0, 0, -1, 0, 0},
          New Single() {0, 0, 0, 1, 0},
          New Single() {1, 1, 1, 0, 0}
        }
 
        Dim imgMatrix As New ColorMatrix(imgMatrixElement)
        imageAttributes.SetColorMatrix(imgMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap)
 
        Dim destImg As New Bitmap(sourceImg.Width, sourceImg.Height)
        Dim g As Graphics = Graphics.FromImage(destImg)
        g.DrawImage(sourceImg, New Rectangle(0, 0, sourceImg.Width, sourceImg.Height), 0, 0, sourceImg.Width, sourceImg.Height,
                    GraphicsUnit.Pixel, imageAttributes)
 
        picDest.Image = destImg
    End Sub
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
传入的矩阵不同，输出图像的颜色不同。
 
 
 
由于.net平台下C#和vb.NET很相似，本文也可以为C#爱好者提供参考。
 
学习更多vb.net知识，请参看 vb.net 教程 目录
 
 
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版权声明：本文为CSDN博主「VB.Net」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/uruseibest/article/details/72859099

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