ImageAttributes.SetOutputChannel 方法

定義

命名空間:

System.Drawing.Imaging

組件:

System.Drawing.Common.dll

套件:

System.Drawing.Common v11.0.0-preview.4.26230.115

設定 CMYK（青-洋紅-黃-黑）輸出通道。

多載

名稱	Description
SetOutputChannel(ColorChannelFlag)	預設類別的 CMYK（青-品紅-黃-黑）輸出通道。
SetOutputChannel(ColorChannelFlag, ColorAdjustType)	設定指定類別的CMYK（青-洋紅-黃-黑）輸出通道。

SetOutputChannel(ColorChannelFlag)

來源:

ImageAttributes.cs

預設類別的 CMYK（青-品紅-黃-黑）輸出通道。

public:
 void SetOutputChannel(System::Drawing::Imaging::ColorChannelFlag flags);

public void SetOutputChannel(System.Drawing.Imaging.ColorChannelFlag flags);

member this.SetOutputChannel : System.Drawing.Imaging.ColorChannelFlag -> unit

Public Sub SetOutputChannel (flags As ColorChannelFlag)

參數

flags

ColorChannelFlag

其中一個元素 ColorChannelFlag 指定輸出通道。

範例

以下程式碼範例示範如何使用此 SetOutputChannel 方法。 要執行此範例，請將以下程式碼貼上到 Windows 表單中。 處理該型態的Paint事件，並呼叫 ShowOutputChannels，通過 e 。PaintEventArgs

private void ShowOutputChannels(PaintEventArgs e)
{
    //Create a bitmap from a file.
    Bitmap bmp1 = new Bitmap("c:\\fakePhoto.jpg");

    // Create a new bitmap from the original, resizing it for this example.
    Bitmap bmp2 = new Bitmap(bmp1, new Size(80, 80));

    bmp1.Dispose();

    // Create an ImageAttributes object.
    ImageAttributes imgAttributes = new ImageAttributes();

    // Draw the image unaltered.
    e.Graphics.DrawImage(bmp2, 10, 10);

    // Draw the image, showing the intensity of the cyan channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelC,
        System.Drawing.Imaging.ColorAdjustType.Bitmap);

    e.Graphics.DrawImage(bmp2, new Rectangle(100, 10, bmp2.Width, bmp2.Height),
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes);

    // Draw the image, showing the intensity of the magenta channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelM,
        ColorAdjustType.Bitmap);

    e.Graphics.DrawImage(bmp2, new Rectangle(10, 100, bmp2.Width, bmp2.Height),
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes);

    // Draw the image, showing the intensity of the yellow channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelY,
        ColorAdjustType.Bitmap);

    e.Graphics.DrawImage(bmp2, new Rectangle(100, 100, bmp2.Width, bmp2.Height), 0, 0,
        bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes);

    // Draw the image, showing the intensity of the black channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelK,

        System.Drawing.Imaging.ColorAdjustType.Bitmap);
    e.Graphics.DrawImage(bmp2, new Rectangle(10, 190, bmp2.Width, bmp2.Height),
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes);

    //Dispose of the bitmap.
    bmp2.Dispose();
}

Private Sub ShowOutputChannels(ByVal e As PaintEventArgs)

    'Create a bitmap from a file.
    Dim bmp1 As New Bitmap("c:\fakePhoto.jpg")

    ' Create a new bitmap from the original, resizing it for this example.
    Dim bmp2 As New Bitmap(bmp1, New Size(80, 80))

    bmp1.Dispose()

    ' Create an ImageAttributes object.
    Dim imgAttributes As New System.Drawing.Imaging.ImageAttributes()

    ' Draw the image unaltered.
    e.Graphics.DrawImage(bmp2, 10, 10)

    ' Draw the image, showing the intensity of the cyan channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelC, ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(bmp2, New Rectangle(100, 10, bmp2.Width, bmp2.Height), _
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes)

    ' Draw the image, showing the intensity of the magenta channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelM, ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(bmp2, New Rectangle(10, 100, bmp2.Width, bmp2.Height), _
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes)

    ' Draw the image, showing the intensity of the yellow channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelY, _
        ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(bmp2, New Rectangle(100, 100, bmp2.Width, bmp2.Height), _
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes)

    ' Draw the image, showing the intensity of the black channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelK, _
        ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(bmp2, New Rectangle(10, 190, bmp2.Width, bmp2.Height), _
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes)

    'Dispose of the bitmap.
    bmp2.Dispose()

End Sub

備註

你可以用這個 SetOutputChannel 方法將影像轉換成 CMYK 色彩空間，並檢查其中一個 CMYK 色彩通道的強度。 舉例來說，假設你建立一個 ImageAttributes 物件，並將其點陣圖輸出通道設為 ColorChannelC。 如果你把該 ImageAttributes 物件的路徑傳給方法， DrawImage 會計算出每個像素的青色分量，渲染影像中的每個像素都是灰色，代表其青色通道的強度。 同樣地，你也可以渲染出顯示洋紅、黃色和黑色通道強度的影像。

物件 ImageAttributes 會維持五個調整類別的色彩與灰階設定：預設、點陣圖、筆刷、筆觸和文字。 例如，你可以為預設類別指定輸出通道，為點陣類別指定不同的輸出通道。

默認色彩調整和灰階調整設定適用於沒有自己調整設定的所有類別。 例如，如果你從未為點陣圖類別指定任何調整設定，預設設定會套用到點陣圖類別。

SetOutputChannel(ColorChannelFlag, ColorAdjustType)

來源:

ImageAttributes.cs

設定指定類別的CMYK（青-洋紅-黃-黑）輸出通道。

public:
 void SetOutputChannel(System::Drawing::Imaging::ColorChannelFlag flags, System::Drawing::Imaging::ColorAdjustType type);

public void SetOutputChannel(System.Drawing.Imaging.ColorChannelFlag flags, System.Drawing.Imaging.ColorAdjustType type);

member this.SetOutputChannel : System.Drawing.Imaging.ColorChannelFlag * System.Drawing.Imaging.ColorAdjustType -> unit

Public Sub SetOutputChannel (flags As ColorChannelFlag, type As ColorAdjustType)

參數

flags

ColorChannelFlag

其中一個元素 ColorChannelFlag 指定輸出通道。

type

ColorAdjustType

其中的一個元素 ColorAdjustType 指定輸出通道所設定的類別。

範例

以下程式碼範例示範如何使用此 SetOutputChannel 方法。 要執行此範例，請將以下程式碼貼上到 Windows 表單中。 處理該型態的Paint事件，並呼叫 ShowOutputChannels，通過 e 。PaintEventArgs

private void ShowOutputChannels(PaintEventArgs e)
{
    //Create a bitmap from a file.
    Bitmap bmp1 = new Bitmap("c:\\fakePhoto.jpg");

    // Create a new bitmap from the original, resizing it for this example.
    Bitmap bmp2 = new Bitmap(bmp1, new Size(80, 80));

    bmp1.Dispose();

    // Create an ImageAttributes object.
    ImageAttributes imgAttributes = new ImageAttributes();

    // Draw the image unaltered.
    e.Graphics.DrawImage(bmp2, 10, 10);

    // Draw the image, showing the intensity of the cyan channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelC,
        System.Drawing.Imaging.ColorAdjustType.Bitmap);

    e.Graphics.DrawImage(bmp2, new Rectangle(100, 10, bmp2.Width, bmp2.Height),
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes);

    // Draw the image, showing the intensity of the magenta channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelM,
        ColorAdjustType.Bitmap);

    e.Graphics.DrawImage(bmp2, new Rectangle(10, 100, bmp2.Width, bmp2.Height),
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes);

    // Draw the image, showing the intensity of the yellow channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelY,
        ColorAdjustType.Bitmap);

    e.Graphics.DrawImage(bmp2, new Rectangle(100, 100, bmp2.Width, bmp2.Height), 0, 0,
        bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes);

    // Draw the image, showing the intensity of the black channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelK,

        System.Drawing.Imaging.ColorAdjustType.Bitmap);
    e.Graphics.DrawImage(bmp2, new Rectangle(10, 190, bmp2.Width, bmp2.Height),
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes);

    //Dispose of the bitmap.
    bmp2.Dispose();
}

Private Sub ShowOutputChannels(ByVal e As PaintEventArgs)

    'Create a bitmap from a file.
    Dim bmp1 As New Bitmap("c:\fakePhoto.jpg")

    ' Create a new bitmap from the original, resizing it for this example.
    Dim bmp2 As New Bitmap(bmp1, New Size(80, 80))

    bmp1.Dispose()

    ' Create an ImageAttributes object.
    Dim imgAttributes As New System.Drawing.Imaging.ImageAttributes()

    ' Draw the image unaltered.
    e.Graphics.DrawImage(bmp2, 10, 10)

    ' Draw the image, showing the intensity of the cyan channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelC, ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(bmp2, New Rectangle(100, 10, bmp2.Width, bmp2.Height), _
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes)

    ' Draw the image, showing the intensity of the magenta channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelM, ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(bmp2, New Rectangle(10, 100, bmp2.Width, bmp2.Height), _
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes)

    ' Draw the image, showing the intensity of the yellow channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelY, _
        ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(bmp2, New Rectangle(100, 100, bmp2.Width, bmp2.Height), _
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes)

    ' Draw the image, showing the intensity of the black channel.
    imgAttributes.SetOutputChannel(ColorChannelFlag.ColorChannelK, _
        ColorAdjustType.Bitmap)

    e.Graphics.DrawImage(bmp2, New Rectangle(10, 190, bmp2.Width, bmp2.Height), _
        0, 0, bmp2.Width, bmp2.Height, GraphicsUnit.Pixel, imgAttributes)

    'Dispose of the bitmap.
    bmp2.Dispose()

End Sub

備註

你可以用這個 SetOutputChannel 方法將影像轉換成 CMYK 色彩空間，並檢查其中一個 CMYK 色彩通道的強度。 舉例來說，假設你建立一個 ImageAttributes 物件，並將其點陣圖輸出通道設為 ColorChannelC。 如果你把該 ImageAttributes 物件的路徑傳給方法， DrawImage 會計算出每個像素的青色分量，渲染影像中的每個像素都是灰色，代表其青色通道的強度。 同樣地，你也可以渲染出顯示洋紅、黃色和黑色通道強度的影像。

物件 ImageAttributes 會維持五個調整類別的色彩與灰階設定：預設、點陣圖、筆刷、筆觸和文字。 例如，你可以為預設類別指定輸出通道，為點陣類別指定不同的輸出通道。

默認色彩調整和灰階調整設定適用於沒有自己調整設定的所有類別。 例如，如果你從未為點陣圖類別指定任何調整設定，預設設定會套用到點陣圖類別。

一旦您指定特定類別的色彩調整或灰階調整設定，預設調整設定就不再套用至該類別。 例如，假設您指定預設類別的調整設定集合。 如果你透過傳遞 Bitmap 方法 SetOutputChannel 設定點陣圖類別的輸出通道，預設調整設定不會套用到點陣圖。