Convert PDF to other images in C#

PDF to Other Image

To convert a page in a PDF document to an image file format not mentioned on the other pages, use the following methods:

Most of these methods take two parameters:

  • The image ID.
  • The path to the output file.

This guide explains how to convert a PDF page to a PBM file.

Converting a PDF page to PBM

To create a PBM image from a page in a PDF document, follow the steps below:

  1. Create a GdPicturePDF object and a GdPictureImaging object.
  2. Load the source document by passing its path to the LoadFromFile method of the GdPicturePDF object.
  3. Select the page that you want to convert to an image with the SelectPage method of the GdPicturePDF object.
  4. Render the selected page to a 200 dots-per-inch (DPI) image with the RenderPageToGdPictureImageEx method of the GdPicturePDF object.
  5. Save the output in a PBM image with the SaveAsPBM method.

The example below creates a PBM image from the first page of a PDF document:

using GdPicturePDF gdpicturePDF = new GdPicturePDF();
using GdPictureImaging gdpictureImaging = new GdPictureImaging();
// Load the source PDF document.
gdpicturePDF.LoadFromFile(@"C:\temp\source.pdf");
// Select the first page of the PDF.
gdpicturePDF.SelectPage(1);
// Render the selected page to an image.
int imageId = gdpicturePDF.RenderPageToGdPictureImageEx(200, true);
// Save the output in a PBM image.
gdpictureImaging.SaveAsPBM(imageId, @"C:\temp\output.pbm");
// Release unnecessary resources.
gdpictureImaging.ReleaseGdPictureImage(imageId);
gdpicturePDF.CloseDocument();
Used methods
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