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PdfFocusCImageOptionsColorDepth Property

Set a color depth for the produced images. Default value: Default value: 24 bit RGB.

Namespace: SautinSoft
Assembly: SautinSoft.PdfFocus (in SautinSoft.PdfFocus.dll) Version: 2024.3.28
Syntax
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public PdfFocusCImageOptionseColorDepth ColorDepth { get; set; }

Property Value

PdfFocusCImageOptionseColorDepth
Remarks
Color depth or bit depth is the number of bits used to represent the color of a single pixel. Default value: 24 bit RGB

Example
How to set color depth in C#
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using System;
using System.IO;

namespace Sample
{
    class Sample
    {
        static void Main(string[] args)
        {
                                  // Get your free 30-day key here:   
             // https://sautinsoft.com/start-for-free/

            //How to convert PDF to 1-bit black and white PNG
            SautinSoft.PdfFocus f = new SautinSoft.PdfFocus();

            string pdfPath = Path.GetFullPath(@"..\..\..\Potato Beetle.pdf");
            string imagePath = "Result.png";

            f.OpenPdf(pdfPath);

            if (f.PageCount > 0)
            {
                //save 1st page to png file, 200 dpi
                f.ImageOptions.ImageFormat = SautinSoft.PdfFocus.CImageOptions.ImageFormats.Png;
                f.ImageOptions.Dpi = 200;
                //Make "Black and White 1-bit indexed" image
                f.ImageOptions.ColorDepth = SautinSoft.PdfFocus.CImageOptions.eColorDepth.BlackWhite1bpp;

                if (f.ToImage(imagePath, 1) == 0)
                {
                    // 0 - converting successfully                
                    // 2 - can't create output file, check the output path
                    // 3 - converting failed
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(imagePath) { UseShellExecute = true });
                }
            }
        }
    }
}
How to set color depth in VB.Net
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Imports System
Imports System.IO

Namespace Sample
    Friend Class Sample
        Shared Sub Main(ByVal args() As String)
                                  ' Get your free 30-day key here:   
             ' https://sautinsoft.com/start-for-free/

            'How to convert PDF to 1-bit black and white PNG
            Dim f As New SautinSoft.PdfFocus()

            Dim pdfPath As String = Path.GetFullPath("..\..\..\Potato Beetle.pdf")
            Dim imagePath As String = "Result.png"

            f.OpenPdf(pdfPath)

            If f.PageCount > 0 Then
                'save 1st page to png file, 200 dpi
                f.ImageOptions.ImageFormat = SautinSoft.PdfFocus.CImageOptions.ImageFormats.Png
                f.ImageOptions.Dpi = 200
                'Make "Black and White 1-bit indexed" image
                f.ImageOptions.ColorDepth = SautinSoft.PdfFocus.CImageOptions.eColorDepth.BlackWhite1bpp

                If f.ToImage(imagePath, 1) = 0 Then
                    ' 0 - converting successfully                
                    ' 2 - can't create output file, check the output path
                    ' 3 - converting failed
                    System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(imagePath) With {.UseShellExecute = True})
                End If
            End If
        End Sub
    End Class
End Namespace
See Also