Issues with OptimizeResources and ImageCompression

Aspose.PDF Product Family
1

I’m using this code to compress pdf:

var doc = new Document(inputPath);
var opts = new OptimizationOptions
{
    AllowReusePageContent = true,
    LinkDuplcateStreams = true,
    RemoveUnusedObjects = true,
    RemoveUnusedStreams = true,
    SubsetFonts = true,
    UnembedFonts = true,
    CompressObjects = true,
    ImageCompressionOptions =
    {
        Encoding = ImageEncoding.Jpeg,
        CompressImages = false,
        ImageQuality = 100,
        ResizeImages = false
    }
};

This works fine but if I add any image compression:

opts.MaxResoultion= 150; 
opts.ImageCompressionOptions.ImageQuality = 20;
opts.ImageCompressionOptions.CompressImages = true;
opts.ImageCompressionOptions.ResizeImages = true;

Instead of this:

image.jpg (141.4 KB)

I get:

image.png (119.8 KB)

This happens with any value for image quality.

Problematic file:

https://cdn.filestar.com/uploads/b869fdda-d7b8-4bc8-a1dd-0abdd00160cf/upload.zip

2

@nielsbosma

Have you tried using 23.9 version? We used it and faced IndexOutOfRange Exception. Can you please share the complete code snippet? We will further proceed to assist you accordingly.

3

var doc = new Document(inputPath);
var opts = new OptimizationOptions
{
AllowReusePageContent = true,
LinkDuplcateStreams = true,
RemoveUnusedObjects = true,
RemoveUnusedStreams = true,
SubsetFonts = true,
UnembedFonts = true,
CompressObjects = true,
ImageCompressionOptions =
{
Encoding = ImageEncoding.Jpeg,
CompressImages = false,
ImageQuality = 100,
ResizeImages = false
}
};

opts.MaxResoultion= 150;
opts.ImageCompressionOptions.ImageQuality = 20;
opts.ImageCompressionOptions.CompressImages = true;
opts.ImageCompressionOptions.ResizeImages = true;

doc.Save(outputPath, new PdfSaveOptions());

I’m using Aspose.PDF.Drawing version 23.8.0. I don’t see any 23.9.0 in my nuget feed.

4

@nielsbosma

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): PDFNET-55535

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.

5

The issues you have found earlier (filed as PDFNET-55535) have been fixed in Aspose.PDF for .NET 24.6.