Today, we released a new version of PDF Converter for Power Automate, REST API, and Server Platform that features advanced MRC and JBIG2 compression on output PDFs. This enables users to compress PDFs using our REST API or our Power Automate connector. For users of PDF Converter Server Platform (on-premises) deployment, the conversion to PDF and the PDF compression occur at the same time.
Our hyper-compression technology includes:
- Color detection
- Mixed raster content
- Compressing files by removing unneeded content
JPEG2000 compression is suitable for 8 bits-per-pixel grayscale and non-indexed color images. This compression method changes the compression rate or quality score used to compress JPEG2000 images within the currently loaded PDF document.
There are two ways to set the quality parameter. Positive values determine the compression rate between
1 (lossless) and
512 (poor). Negative values determine the quality score between
-1 (worst quality) and
-100 (best quality). The default value is
Lossless JBIG2 Compression for Bitonal Images
The JBIG2 compression engine allows you to convert from more than 100 file formats to JBIG2. It supports both lossless and lossy compression of images with a pattern matching and substitution engine that’s based on full-page layout analysis, and both single- and multi-page JBIG2 images can be processed. This compression engine can compress two to five times more than CCITT4, it has low memory usage, and it can work in multithread applications.
The automatic color detection plugin allows your applications to automatically detect the original color of files that are scanned in color mode and convert the bitonal, color, and/or grayscale ones to the appropriate bits-per-pixel encoding. In this way, the image quality is preserved, while the file size is considerably reduced. With the color detection plugin, users can develop applications that will perform quick and unattended optimizations of image and PDF files.
Mixed Raster Content Compression
Mixed raster content (MRC) compression allows you to reduce the size of images and improve the rendering quality and document perception. It can also improve the speed and rate of subsequent OCR processes. With MRC compression, the quality adjustment of different layers is done automatically, and the engine adapts to the input layout of the document.
This technology uses image segmentation to compress areas with the optimum algorithm based on their characteristics, and it can process documents in any orientation and at any skew level. The method produces optimal results with documents mixing text, graphics, forms, and images. MRC compression can perform automatic and fast document processing with no perceptible data removal or alteration, and it can shape content distribution analysis to produce high-quality results. As an example, the compression ratio is high enough to reduce the file size from 686 KB to 69 KB.
Removing Unneeded Content from PDF Files