Как преобразовать PDF в 1-битный черно-белый PNG на C# и .NET
Полный код
GitHubusing System;
using System.IO;
namespace Sample
{
class Sample
{
static void Main(string[] args)
{
// Before starting, we recommend to get a free 100-day key:
// https://sautinsoft.com/start-for-free/
// Apply the key here:
// SautinSoft.PdfFocus.SetLicense("...");
//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, 300 dpi
f.ImageOptions.ImageFormat = SautinSoft.PdfFocus.CImageOptions.ImageFormats.Png;
f.ImageOptions.Dpi = 300;
//Make "Black and White 1-bit indexed" image
f.ImageOptions.ColorDepth = SautinSoft.PdfFocus.CImageOptions.eColorDepth.BlackWhite1bpp;
f.ImageOptions.SelectedPages = new int[] { 0 };
if (f.ToImage(imagePath) == 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 });
}
}
}
}
}
Imports System
Imports System.IO
Namespace Sample
Friend Class Sample
Shared Sub Main(ByVal args() As String)
' Before starting, we recommend to get a free 100-day key:
' https://sautinsoft.com/start-for-free/
' Apply the key here:
' SautinSoft.PdfFocus.SetLicense("...");
'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, 300 dpi
f.ImageOptions.ImageFormat = SautinSoft.PdfFocus.CImageOptions.ImageFormats.Png
f.ImageOptions.Dpi = 300
'Make "Black and White 1-bit indexed" image
f.ImageOptions.ColorDepth = SautinSoft.PdfFocus.CImageOptions.eColorDepth.BlackWhite1bpp
f.ImageOptions.SelectedPages = New Integer() { 0 }
If f.ToImage(imagePath) = 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
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