TransformWithLUT Method

In This Topic

Applies lookup tables to each channel of the image, optionally changing channel depths.

Syntax

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

'Declaration
 
Public Shared Sub TransformWithLUT( _
   ByVal page As ImGearRasterPage, _
   ByVal LUT As ImGearMultichannelLUT _
)

'Usage
 
Dim page As ImGearRasterPage
Dim LUT As ImGearMultichannelLUT
 
ImGearRasterProcessing.TransformWithLUT(page, LUT)

public static void TransformWithLUT( 
   ImGearRasterPage page,
   ImGearMultichannelLUT LUT
)

public: static void TransformWithLUT( 
   ImGearRasterPage* page,
   ImGearMultichannelLUT* LUT
)

public:
static void TransformWithLUT( 
   ImGearRasterPage^ page,
   ImGearMultichannelLUT^ LUT
)

Parameters

page: Page to apply the LUT to.
LUT: Multichannel LUT that shall be applied.

Remarks

This method applies a multichannel lookup table to each channel of the image, optionally changing channel depths.

Number of single-channel LUTs in the multichannel LUT must match number of image channels. Input depth of each single-channel LUT must match the depth of corresponding channel. Depths of image channels after transform are determined by output depths of the coresponding single-channel LUTs.

Example

C#
Visual Basic

// Make sure the image is gray.
if (!ImGearRasterProcessing.ImageIsGray(igRasterPage))
    return;
// Create a LUT to convert image from 8bit to 4bit while also inverting.
ImGearMultichannelLUT igMultichannelLUT = new ImGearMultichannelLUT(
    igRasterPage.DIB.ChannelCount, 8, 4);
for (int i = 0; i < 255; ++i )
{
    igMultichannelLUT[0][i] = 15 - (i / 16);
}
// Transform the image with the LUT.
ImGearRasterProcessing.TransformWithLUT(igRasterPage,igMultichannelLUT);

' Make sure the image is gray.
If Not ImGearRasterProcessing.ImageIsGray(igRasterPage) Then
    Return
End If
' Create a LUT to convert image from 8bit to 4bit while also inverting.
Dim igMultichannelLUT As New ImGearMultichannelLUT(igRasterPage.DIB.ChannelCount, 8, 4)
For i As Integer = 0 To 254
    igMultichannelLUT(0)(i) = 15 - (i / 16)
Next
' Transform the image with the LUT.
ImGearRasterProcessing.TransformWithLUT(igRasterPage, igMultichannelLUT)

Reference

ImGearRasterProcessing Class
ImGearRasterProcessing Members
ImGearRasterPage Class
ImGearMultichannelLUT Class

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