// Creates a thumbnail 100 pixels wide maintaining aspect ratio.

// Determine appropriate height.
int newHeight = 100 * igPage.DIB.Height / igPage.DIB.Width;

// Set default interpolation to none.
ImGearInterpolations igInterpolations = ImGearInterpolations.NONE;

// If the image is 1-bit and larger than 100x100, use grayscale interpolation.
if (igPage is ImGearRasterPage &&
    1 == igPage.DIB.BitDepth &&
    igPage.DIB.Width >= 100 &&
    igPage.DIB.Height >= 100)
{
    igInterpolations = ImGearInterpolations.GRAYSCALE;
}

// Create the thumbnail using the default options for the chosen interpolation.
ImGearPage igPageThumbnail = ImGearProcessing.CreateThumbnail(igPage, 100, newHeight,
    ImGearInterpolationOptions.GetDefault(igInterpolations));

' Creates a thumbnail 100 pixels wide maintaining aspect ratio.

' Determine appropriate height.
Dim newHeight As Integer = 100 * igPage.DIB.Height / igPage.DIB.Width

' Set default interpolation to none.
Dim igInterpolations As ImGearInterpolations = ImGearInterpolations.NONE

' If the image is 1-bit and larger than 100x100, use grayscale interpolation.
If TypeOf igPage Is ImGearRasterPage AndAlso 1 = igPage.DIB.BitDepth AndAlso _
 igPage.DIB.Width >= 100 AndAlso igPage.DIB.Height >= 100 Then
    igInterpolations = ImGearInterpolations.GRAYSCALE
End If

' Create the thumbnail using the default options for the chosen interpolation.
Dim igPageThumbnail As ImGearPage
igPageThumbnail = ImGearProcessing.CreateThumbnail(igPage, 100, newHeight, _
 ImGearInterpolationOptions.GetDefault(igInterpolations))