TransformWithLUT Method

In This Topic

Syntax
Remarks
Example
See Also

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

Syntax

public static void TransformWithLUT( 
   ImGearRasterPage page,
   ImGearMultichannelLUT LUT
)

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

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

'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)

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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