ImageGear PDF v25.2 - Updated
SeparateChannels Method
Example 




ImageGear.Core Assembly > ImageGear.Processing Namespace > ImGearRasterProcessing Class : SeparateChannels Method
Multichannel page to separate.
Creates an array of pages, where each page contains one channel with color space set to grayscale.
Syntax
'Declaration
 
Public Shared Function SeparateChannels( _
   ByVal page As ImGearRasterPage _
) As ImGearChannelRef()
'Usage
 
Dim page As ImGearRasterPage
Dim value() As ImGearChannelRef
 
value = ImGearRasterProcessing.SeparateChannels(page)
public static ImGearChannelRef[] SeparateChannels( 
   ImGearRasterPage page
)
public: static ImGearChannelRef[]* SeparateChannels( 
   ImGearRasterPage* page
) 
public:
static array<ImGearChannelRef>^ SeparateChannels( 
   ImGearRasterPage^ page
) 

Parameters

page
Multichannel page to separate.

Return Value

An array of channels reference - ImGearChannelRef structure.
Remarks
This method does not do any of the color space or pixel conversions.
Example
// Separate original image into separate images for each channel.
ImGearChannelRef[] igChannelRefOriginal = ImGearRasterProcessing.SeparateChannels(igRasterPage);
// Save what the colorspace was of the image.
ImGearColorSpaceIDs igColorSpaceID = igRasterPage.DIB.ColorSpace.Value;
// Create a blank image with the same attributes as the original image.
ImGearRasterPage igRasterPageNew = new ImGearRasterPage(
    igRasterPage.DIB.Width, igRasterPage.DIB.Height,
    new ImGearColorSpace(igColorSpaceID),
    (int[])igRasterPage.DIB.ChannelDepths.Clone(), true);
// Separate new image into separate images for each channel.
ImGearChannelRef[] igChannelRefNew = ImGearRasterProcessing.SeparateChannels(igRasterPageNew);
// Update the first channel of the new image from the original image.
ImGearRasterProcessing.UpdateChannelFrom(igChannelRefNew[0], igChannelRefOriginal[0]);
// Combine channels back into new image.
igRasterPageNew = ImGearRasterProcessing.CombineChannels(
    new ImGearColorSpace(igColorSpaceID), igChannelRefNew);
' Separate original image into separate images for each channel.
Dim igChannelRefOriginal As ImGearChannelRef() = ImGearRasterProcessing.SeparateChannels(igRasterPage)
' Save what the colorspace was of the image.
Dim igColorSpaceID As ImGearColorSpaceIDs = igRasterPage.DIB.ColorSpace.Value
' Create a blank image with the same attributes as the original image.
Dim igRasterPageNew As New ImGearRasterPage( _
 igRasterPage.DIB.Width, igRasterPage.DIB.Height, New ImGearColorSpace(igColorSpaceID), _
 DirectCast(igRasterPage.DIB.ChannelDepths.Clone(), Integer()), True)
' Separate new image into separate images for each channel.
Dim igChannelRefNew As ImGearChannelRef() = ImGearRasterProcessing.SeparateChannels(igRasterPageNew)
' Update the first channel of the new image from the original image.
ImGearRasterProcessing.UpdateChannelFrom(igChannelRefNew(0), igChannelRefOriginal(0))
' Combine channels back into new image.
igRasterPageNew = ImGearRasterProcessing.CombineChannels(New ImGearColorSpace(igColorSpaceID), igChannelRefNew)
See Also

Reference

ImGearRasterProcessing Class
ImGearRasterProcessing Members
ImGearChannelRef Structure
ImGearRasterPage Class

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