👁 Image
PdfPig.Filters.Jpx.OpenJpeg 0.1.12.1

UglyToad.PdfPig.Filters.Jpx.OpenJpeg

PdfPig implementation of the JPX (Jpeg2000) filter, based on OpenJPEG.net

Other filters

• JPX filter alternative approach available here: https://github.com/BobLd/UglyToad.PdfPig.Filters.Jpx.OpenJpegDotNet
• DCT filter available here: https://github.com/BobLd/UglyToad.PdfPig.Filters.Dct.JpegLibrary
• JBIG2 filter available here: https://github.com/BobLd/UglyToad.PdfPig.Filters.Jbig2.PdfboxJbig2

Usage

// Create your filter provider
public sealed class MyFilterProvider : BaseFilterProvider
{
 /// <summary>
 /// The single instance of this provider.
 /// </summary>
 public static readonly IFilterProvider Instance = new MyFilterProvider();

 /// <inheritdoc/>
 private MyFilterProvider() : base(GetDictionary())
 {
 }

 private static Dictionary<string, IFilter> GetDictionary()
 {
 var ascii85 = new Ascii85Filter();
 var asciiHex = new AsciiHexDecodeFilter();
 var ccitt = new CcittFaxDecodeFilter();
 var dct = new DctDecodeFilter();
 var flate = new FlateFilter();
 var jbig2 = new Jbig2DecodeFilter();
 var jpx = new OpenJpegJpxDecodeFilter(); // new filter
 var runLength = new RunLengthFilter();
 var lzw = new LzwFilter();

 return new Dictionary<string, IFilter>
 {
 { NameToken.Ascii85Decode.Data, ascii85 },
 { NameToken.Ascii85DecodeAbbreviation.Data, ascii85 },
 { NameToken.AsciiHexDecode.Data, asciiHex },
 { NameToken.AsciiHexDecodeAbbreviation.Data, asciiHex },
 { NameToken.CcittfaxDecode.Data, ccitt },
 { NameToken.CcittfaxDecodeAbbreviation.Data, ccitt },
 { NameToken.DctDecode.Data, dct }, // new filter
 { NameToken.DctDecodeAbbreviation.Data, dct },
 { NameToken.FlateDecode.Data, flate },
 { NameToken.FlateDecodeAbbreviation.Data, flate },
 { NameToken.Jbig2Decode.Data, jbig2 },
 { NameToken.JpxDecode.Data, jpx },
 { NameToken.RunLengthDecode.Data, runLength },
 { NameToken.RunLengthDecodeAbbreviation.Data, runLength },
 { NameToken.LzwDecode.Data, lzw },
 { NameToken.LzwDecodeAbbreviation.Data, lzw }
 };
 }
}



var parsingOption = new ParsingOptions()
{
	UseLenientParsing = true,
	SkipMissingFonts = true,
	FilterProvider = MyFilterProvider.Instance
};

using (var doc = PdfDocument.Open("test.pdf", parsingOption))
{
	int i = 0;
	foreach (var page in doc.GetPages())
	{
		foreach (var pdfImage in page.GetImages())
		{
			Assert.True(pdfImage.TryGetPng(out var bytes));

			File.WriteAllBytes($"image_{i++}.png", bytes);
		}
	}
}