ImageGear .NET
ImageIsGray Method
Example 




Image to test.
Returns true if either the image has GrayScale color space or its palette is gray or inverted gray.
Syntax
'Declaration
 
Public Shared Function ImageIsGray( _
   ByVal page As ImGearRasterPage _
) As Boolean
'Usage
 
Dim page As ImGearRasterPage
Dim value As Boolean
 
value = ImGearRasterProcessing.ImageIsGray(page)
public static bool ImageIsGray( 
   ImGearRasterPage page
)
public: static bool ImageIsGray( 
   ImGearRasterPage* page
) 
public:
static bool ImageIsGray( 
   ImGearRasterPage^ page
) 

Parameters

page
Image to test.

Return Value

Boolean value.
Remarks
This method returns true if either of the two conditions are met:
Example
// 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)
See Also

Reference

ImGearRasterProcessing Class
ImGearRasterProcessing Members
ImGearRasterPage Class

 

 


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