UpdateChannelFrom Method

In This Topic

Copies channel from channel referenced by channelUpdateWith to the channel referenced by channelToUpdate. The pages containing both channels must have the same width and height.

Syntax

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Shared Sub UpdateChannelFrom( _
   ByVal channelToUpdate As ImGearChannelRef, _
   ByVal channelUpdateWith As ImGearChannelRef _
)

'Usage
 
Dim channelToUpdate As ImGearChannelRef
Dim channelUpdateWith As ImGearChannelRef
 
ImGearRasterProcessing.UpdateChannelFrom(channelToUpdate, channelUpdateWith)

public static void UpdateChannelFrom( 
   ImGearChannelRef channelToUpdate,
   ImGearChannelRef channelUpdateWith
)

public: static void UpdateChannelFrom( 
   ImGearChannelRef channelToUpdate,
   ImGearChannelRef channelUpdateWith
)

public:
static void UpdateChannelFrom( 
   ImGearChannelRef channelToUpdate,
   ImGearChannelRef channelUpdateWith
)

Parameters

channelToUpdate: Destination channel.
channelUpdateWith: Source channel.

Example

C#
Visual Basic

// 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)

Reference

ImGearRasterProcessing Class
ImGearRasterProcessing Members
ImGearChannelRef Structure

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