Take the following steps to add code that creates CMYK color separations, displays each of the color planes, merges the planes, and displays the result. The code increases the contrast of the K plane to demonstrate how you can manipulate the color separations:
In the "Solution Explorer" window, right-click the "References" folder, and select "Add Reference…" from the context menu. In the "Add Reference" dialog box, select the ".NET" tab and browse to Leadtools For .NET "<LEADTOOLS_INSTALLDIR>\Bin\DotNet4\Win32 " folder and select the following DLLs:
Click the Select button and then press the OK button to add the above DLLs to the application.
Switch to Form1 code view (right-click Form1 in the solution explorer then select View Code ) and add the following lines at the beginning of the file:
Add an event handler to the Form1 Load event and add the following code:
' To keep track of what step in the tutorial we are
Private clicksCount As Integer
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' initialize a new RasterCodecs object
Dim codecs As New RasterCodecs
' load the main image into our viewer
RasterImageViewer1.Image = codecs.Load("C:\Users\Public\Documents\LEADTOOLS Images\Sample1.cmp")
Label1.Text = "Click to separate this image into CMYK components"
// To keep track of what step in the tutorial we are
private int clicksCount;
private void Form1_Load(object sender, System.EventArgs e)
// initialize a new RasterCodecs object
RasterCodecs codecs = new RasterCodecs();
// load the main image into our viewer
rasterImageViewer1.Image = codecs.Load(@"C:\Users\Public\Documents\LEADTOOLS Images\Sample1.cmp");
label1.Text = "Click to separate this image into CMYK components";
Double-click the button1 Button on the form to add the event handler for it and add the following code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Select Case (clicksCount)
' Separate the image into 4 images based on the CMYK color space
Dim seperateCommand As New ColorSeparateCommand
seperateCommand.Type = ColorSeparateCommandType.Cmyk
' put this new image (4 pages, 1 for each component) in the viewer
RasterImageViewer1.Image = seperateCommand.DestinationImage
Label1.Text = "C component"
' View the second page that represents the M component
RasterImageViewer1.Image.Page = 2
Label1.Text = "M component"
' View the third page that represents the Y component
RasterImageViewer1.Image.Page = 3
Label1.Text = "Y component"
' View the forth page that represents the K component
RasterImageViewer1.Image.Page = 4
Label1.Text = "K component"
' Merge the 4 images to get the original image again, and reset the clickCount so the user can perform the entire process again.
Dim mergeCommand As New ColorMergeCommand(ColorMergeCommandType.Cmyk)
RasterImageViewer1.Image = mergeCommand.DestinationImage
Label1.Text = "Image colors have been merged again. Click to separate this image into CMYK components"
clicksCount = -1
clicksCount = clicksCount + 1
private void button1_Click(object sender, System.EventArgs e)
// Separate the image into 4 images based on the CMYK color space
ColorSeparateCommand seperateCommand = new ColorSeparateCommand();
seperateCommand.Type = ColorSeparateCommandType.Cmyk;
// put this new image (4 pages, 1 for each component) in the viewer
rasterImageViewer1.Image = seperateCommand.DestinationImage;
label1.Text = "C component";
// View the second page that represents the M component
rasterImageViewer1.Image.Page = 2;
label1.Text = "M component";
// View the third page that represents the Y component
rasterImageViewer1.Image.Page = 3;
label1.Text = "Y component";
// View the forth page that represents the K component
rasterImageViewer1.Image.Page = 4;
label1.Text = "K component";
// Merge the 4 images to get the original image again, and reset the clickCount so the user can perform the entire process again.
ColorMergeCommand mergeCommand = new ColorMergeCommand(ColorMergeCommandType.Cmyk);
rasterImageViewer1.Image = mergeCommand.DestinationImage;
label1.Text = "Image colors have been merged again. Click to separate this image into CMYK components";
clicksCount = -1;
Build, and Run the program to test it. NOTE: If you encounter an "Invalid File Format" or "Feature Not Supported" exception, refer to the Invalid File Format/Feature Not Supported topic.
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