UpdateChannelFrom Method

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