Highly Compressed (MRC) PDF Export
MRC compression (in PDFs) achieves significantly better file compression without visible degradation of document representation. Significant reduced file size, up to 10 times smaller compared to JPEG compression. Ideal when colour documents are scanned and processed.
Improved MRC compression saves bandwidth and storage, especially for colour documents.
Application users benefit from the combination of good visual quality with small file sizes - particularly useful for reading documents on mobile devices.
MRC Compression Scheme
The diagram illustrates the basic principle of MRC PDFs: different sections of a page are compressed with different compression algorithms. So for example
Document image files are usually very large due to the background, which is often makes up to 90% of the file size. The background may, however, be unnecessary in the resulting document. It is the text and pictures that are important.
Picture objects (diagrams, graphs, logos, photos, drawings, stamps, signatures, etc.) are also slightly compressed, but only to an extent that doesn’t lower the quality.
The MRC technology analyzes the outlines of similar characters in the document, creates an average character template and uses it instead of a character itself. This leads to better readability, because some of the text defects are corrected, and the character outlines become more precise.
This “reconstruction” of the document can be useful when you have to deal with low quality images due to: bad lighting, out-of-focus photo, incorrect scanning/photo parameters, dark uncoated paper, or document dilapidation.
MCR Profiles in FineReader Engine 10
For simplified fine tuning, there are now 6 new high-level parameters for PDF Export
New export profiles for different scenarios
The image below shows a code sample that is installed with FineReader Engine 10. It makes the testing and implementation of a good PDF MRC export really easy.
Back to: OCR Processing Feature Overview