ImageAttributes.SetColorMatrix 方法

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

public:
 void SetColorMatrix(System::Drawing::Imaging::ColorMatrix ^ newColorMatrix);

public void SetColorMatrix (System.Drawing.Imaging.ColorMatrix newColorMatrix);

member this.SetColorMatrix : System.Drawing.Imaging.ColorMatrix -> unit

Public Sub SetColorMatrix (newColorMatrix As ColorMatrix)

参数

示例

下面的代码示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码执行以下操作：

1. 创建一个矩形图像，该图像的所有颜色值都设置为 128，生成填充有纯色中灰色的矩形。 然后，该代码将此矩形图像绘制到屏幕。

2. 创建 ColorMatrix 并将其 Matrix 位置设置为 1.75，该位置强调图像的红色组件。

3. 创建 ImageAttributes 对象并调用 SetColorMatrix 方法。

4. 使用刚刚在 ImageAttributes 对象中设置的 ColorMatrix 将图像（第二个矩形）绘制到屏幕。

请注意，第二个矩形强调红色。

private:
   void SetColorMatrixExample( PaintEventArgs^ e )
   {
      // Create a rectangle image with all colors set to 128 (medium
      // gray).
      Bitmap^ myBitmap = gcnew Bitmap( 50,50,PixelFormat::Format32bppArgb );
      Graphics^ g = Graphics::FromImage( myBitmap );
      g->FillRectangle( gcnew SolidBrush( Color::FromArgb( 255, 128, 128, 128 ) ), Rectangle(0,0,50,50) );
      myBitmap->Save( "Rectangle1.jpg" );

      // Open an Image file and draw it to the screen.
      Image^ myImage = Image::FromFile( "Rectangle1.jpg" );
      e->Graphics->DrawImage( myImage, 20, 20 );

      // Initialize the color matrix.
      ColorMatrix^ myColorMatrix = gcnew ColorMatrix;

      // Red
      myColorMatrix->Matrix00 = 1.75f;

      // Green
      myColorMatrix->Matrix11 = 1.00f;

      // Blue
      myColorMatrix->Matrix22 = 1.00f;

      // alpha
      myColorMatrix->Matrix33 = 1.00f;

      // w
      myColorMatrix->Matrix44 = 1.00f;

      // Create an ImageAttributes object and set the color matrix.
      ImageAttributes^ imageAttr = gcnew ImageAttributes;
      imageAttr->SetColorMatrix( myColorMatrix );

      // Draw the image using the color matrix.
      Rectangle rect = Rectangle(100,20,200,200);
      e->Graphics->DrawImage( myImage, rect, 0, 0, 200, 200, GraphicsUnit::Pixel, imageAttr );
   }

private void SetColorMatrixExample(PaintEventArgs e)
{
             
    // Create a rectangle image with all colors set to 128 (medium
             
    // gray).
    Bitmap myBitmap = new Bitmap(50, 50, PixelFormat.Format32bppArgb);
    Graphics g = Graphics.FromImage(myBitmap);
    g.FillRectangle(new SolidBrush(Color.FromArgb(255, 128, 128, 128)),
        new Rectangle(0, 0, 50, 50));
    myBitmap.Save("Rectangle1.jpg");
             
    // Open an Image file and draw it to the screen.
    Image myImage = Image.FromFile("Rectangle1.jpg");
    e.Graphics.DrawImage(myImage, 20, 20);
             
    // Initialize the color matrix.
    ColorMatrix myColorMatrix = new ColorMatrix();
    
    // Red
    myColorMatrix.Matrix00 = 1.75f; 
    
    // Green
    myColorMatrix.Matrix11 = 1.00f; 
    
    // Blue
    myColorMatrix.Matrix22 = 1.00f; 
    
    // alpha
    myColorMatrix.Matrix33 = 1.00f; 
   
    // w
    myColorMatrix.Matrix44 = 1.00f; 

    // Create an ImageAttributes object and set the color matrix.
    ImageAttributes imageAttr = new ImageAttributes();
    imageAttr.SetColorMatrix(myColorMatrix);
             
    // Draw the image using the color matrix.
    Rectangle rect = new Rectangle(100, 20, 200, 200);
    e.Graphics.DrawImage(myImage, rect, 0, 0, 200, 200, 
        GraphicsUnit.Pixel, imageAttr);      
}

Public Sub SetColorMatrixExample(ByVal e As PaintEventArgs)

    ' Create a rectangle image with all colors set to 128 (medium

    ' gray).
    Dim myBitmap As New Bitmap(50, 50, PixelFormat.Format32bppArgb)
    Dim g As Graphics = Graphics.FromImage(myBitmap)
    g.FillRectangle(New SolidBrush(Color.FromArgb(255, 128, 128, _
    128)), New Rectangle(0, 0, 50, 50))
    myBitmap.Save("Rectangle1.jpg")

    ' Open an Image file and draw it to the screen.
    Dim myImage As Image = Image.FromFile("Rectangle1.jpg")
    e.Graphics.DrawImage(myImage, 20, 20)

    ' Initialize the color matrix.
    Dim myColorMatrix As New ColorMatrix
    myColorMatrix.Matrix00 = 1.75F
    ' Red
    myColorMatrix.Matrix11 = 1.0F
    ' Green
    myColorMatrix.Matrix22 = 1.0F
    ' Blue
    myColorMatrix.Matrix33 = 1.0F
    ' alpha
    myColorMatrix.Matrix44 = 1.0F
    ' w

    ' Create an ImageAttributes object and set the color matrix.
    Dim imageAttr As New ImageAttributes
    imageAttr.SetColorMatrix(myColorMatrix)

    ' Draw the image using the color matrix.
    Dim rect As New Rectangle(100, 20, 200, 200)
    e.Graphics.DrawImage(myImage, rect, 0, 0, 200, 200, _
    GraphicsUnit.Pixel, imageAttr)
    ' Image
End Sub
'SetColorMatrixExample

注解

ImageAttributes 对象维护五个调整类别的颜色和灰度设置：默认、位图、画笔、笔和文本。 例如，可以为默认类别指定颜色调整矩阵、位图类别的不同颜色调整矩阵，以及笔类别的颜色调整矩阵。

默认颜色调整和灰度调整设置适用于没有自己调整设置的所有类别。 例如，如果从未为笔类别指定任何调整设置，则默认设置将应用于笔类别。

调用 ImageAttributes.SetColorMatrix(ColorMatrix) 方法等效于调用 ImageAttributes.SetColorMatrix(ColorMatrix, ColorMatrixFlag) 方法，并为 flags 参数传递 ColorMatrixFlag.Default。 ColorMatrixFlag.Default 指定颜色调整矩阵调整所有颜色（包括灰色）

另请参阅

• 重新着色图像

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

public:
 void SetColorMatrix(System::Drawing::Imaging::ColorMatrix ^ newColorMatrix, System::Drawing::Imaging::ColorMatrixFlag flags);

public void SetColorMatrix (System.Drawing.Imaging.ColorMatrix newColorMatrix, System.Drawing.Imaging.ColorMatrixFlag flags);

member this.SetColorMatrix : System.Drawing.Imaging.ColorMatrix * System.Drawing.Imaging.ColorMatrixFlag -> unit

Public Sub SetColorMatrix (newColorMatrix As ColorMatrix, flags As ColorMatrixFlag)

参数

示例

有关代码示例，请参阅 SetColorMatrix(ColorMatrix) 方法。

注解

ImageAttributes 对象维护五个调整类别的颜色和灰度设置：默认、位图、画笔、笔和文本。 例如，可以为默认类别指定颜色调整矩阵、位图类别的不同颜色调整矩阵，以及笔类别的颜色调整矩阵。

默认颜色调整和灰度调整设置适用于没有自己调整设置的所有类别。 例如，如果从未为笔类别指定任何调整设置，则默认设置将应用于笔类别。

另请参阅

• 重新着色图像

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

Source:

ImageAttributes.cs

public:
 void SetColorMatrix(System::Drawing::Imaging::ColorMatrix ^ newColorMatrix, System::Drawing::Imaging::ColorMatrixFlag mode, System::Drawing::Imaging::ColorAdjustType type);

public void SetColorMatrix (System.Drawing.Imaging.ColorMatrix newColorMatrix, System.Drawing.Imaging.ColorMatrixFlag mode, System.Drawing.Imaging.ColorAdjustType type);

member this.SetColorMatrix : System.Drawing.Imaging.ColorMatrix * System.Drawing.Imaging.ColorMatrixFlag * System.Drawing.Imaging.ColorAdjustType -> unit

Public Sub SetColorMatrix (newColorMatrix As ColorMatrix, mode As ColorMatrixFlag, type As ColorAdjustType)

参数

示例

下面的代码示例演示如何使用 SetColorMatrix 方法。 若要运行此示例，请将代码粘贴到 Windows 窗体中，并从窗体的 Paint 事件处理方法调用 RotateColors，并将 e 作为 PaintEventArgs传递。

private void RotateColors(PaintEventArgs e)
{
    Bitmap image = new Bitmap("RotationInput.bmp");
    ImageAttributes imageAttributes = new ImageAttributes();
    int width = image.Width;
    int height = image.Height;
    float degrees = 60f;
    double r = degrees * System.Math.PI / 180; // degrees to radians

    float[][] colorMatrixElements = { 
        new float[] {(float)System.Math.Cos(r),  (float)System.Math.Sin(r),  0,  0, 0},
        new float[] {(float)-System.Math.Sin(r),  (float)-System.Math.Cos(r),  0,  0, 0},
        new float[] {0,  0,  2,  0, 0},
        new float[] {0,  0,  0,  1, 0},
        new float[] {0, 0, 0, 0, 1}};

    ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);

    imageAttributes.SetColorMatrix(
       colorMatrix,
       ColorMatrixFlag.Default,
       ColorAdjustType.Bitmap);

    e.Graphics.DrawImage(image, 10, 10, width, height);

    e.Graphics.DrawImage(
       image,
       new Rectangle(150, 10, width, height),  // destination rectangle 
        0, 0,        // upper-left corner of source rectangle 
        width,       // width of source rectangle
        height,      // height of source rectangle
        GraphicsUnit.Pixel,
       imageAttributes);
}

Private Sub RotateColors(ByVal e As PaintEventArgs)
    Dim image As Bitmap = New Bitmap("RotationInput.bmp")
    Dim imageAttributes As New ImageAttributes()
    Dim width As Integer = image.Width
    Dim height As Integer = image.Height
    Dim degrees As Single = 60.0F
    Dim r As Double = degrees * System.Math.PI / 180 ' degrees to radians
    Dim colorMatrixElements As Single()() = { _
       New Single() {CSng(System.Math.Cos(r)), _
                     CSng(System.Math.Sin(r)), 0, 0, 0}, _
       New Single() {CSng(-System.Math.Sin(r)), _
                     CSng(-System.Math.Cos(r)), 0, 0, 0}, _
       New Single() {0, 0, 2, 0, 0}, _
       New Single() {0, 0, 0, 1, 0}, _
       New Single() {0, 0, 0, 0, 1}}

    Dim colorMatrix As New ColorMatrix(colorMatrixElements)

    imageAttributes.SetColorMatrix( _
       colorMatrix, _
       ColorMatrixFlag.Default, _
       ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(image, 10, 10, width, height)

    ' Pass in the destination rectangle (2nd argument), the upper-left corner 
    ' (3rd and 4th arguments), width (5th argument),  and height (6th 
    ' argument) of the source rectangle.
    e.Graphics.DrawImage( _
       image, _
       New Rectangle(150, 10, width, height), _
       0, 0, _
       width, _
       height, _
       GraphicsUnit.Pixel, _
       imageAttributes)
End Sub

注解

ImageAttributes 对象维护五个调整类别的颜色和灰度设置：默认、位图、画笔、笔和文本。 例如，可以为默认类别指定颜色调整矩阵、位图类别的不同颜色调整矩阵，以及笔类别的颜色调整矩阵。

默认颜色调整和灰度调整设置适用于没有自己调整设置的所有类别。 例如，如果从未为笔类别指定任何调整设置，则默认设置将应用于笔类别。

指定特定类别的颜色调整或灰度调整设置后，默认调整设置将不再应用于该类别。 例如，假设为默认类别指定调整设置的集合。 如果将 Pen 传递给 SetColorMatrix 方法来设置笔类别的颜色调整矩阵，则默认调整设置将不适用于笔。