rock-walker / pdfcompression

Compress PDF documents with help of ITextSharp and FreeImage third party libs. Excellent point to start and customize for your particular cases

PdfCompression

Compress PDF documents with help of ITextSharp and FreeImage third party libs. Excellent point to start and customize for your particular cases.

My experience was based on scanned documents mostly black-and-white. This project could help you to compress files up to 70%

Settings

Build solution and restore Nuget packages ITextSharp and FreeImage.

1. Setup at first parameters SourceFolder and DestinationFolder at App.config file.
2. Copy FreeImage.dll from "\packages\VVVV.FreeImage.3.15.1.1\build\net40\freeimage\x86\FreeImage.dll" into "bin" folder at "PdfCompressorLibrary" and "UnitTests". "FreeImage.dll" is the main C++ lib, which resample, resize images brilliantly.

First launch

Run single test "RunCompression" and point fileName. Verify compressed file in Destination folder. If quality/compressionLevel were not satisfied you, then try to play with "compressionLevel" parameter at "Runner.cs"

pdfcompression's Issues

Compressed file size is bigger than source file

I tested the application with a pdf file which in size 3.184.060 bytes at compression rate 0.75
the resulting file in size 4.692.855 bytes with lower image quality. Is this an expected result?

How can I test this

I download and try run app to test, but documentation very vague. Can you please provide more info on how to run a test?

Decoding of JBIG2Decode

I am looking for a library, which shows the decoding of JBIG2Decode, but this lib only supports DCTDecode and CCITTFaxDecode, correct?

.Net Core 2.1

Is there any code in dotnet core 2.1?