MRC derives from Mixed Raster Content, and is a method for compressing images that contain both binary text and continuous-tone components, using image segmentation methods to improve the level of compression and the quality of the rendered image.
By separating the image into components with different levels of compressibility, the most efficient and accurate compression algorithms for each type can be used. (source: https://en.wikipedia.org/wiki/Mixed_raster_content)
This method can be used on PDF files, allowing ultra compressions, specially for digitalized documents in colors with PDF/A standard, making a file up to 90% smaller! For digitalization projects this is wonderful!
All common PDF readers already recognize this format, and there is some PDF writers/converters available in the market. Unfortunatelly Adobe PRO is not able to use MRC method untill now (feb 2017).
One that I already tested is Luratech Compressor (https://www.luratech.com/en/products/luratech-pdf-compressor-desktop/)
See this comparison using the same PDF file with 4 pages:
|Name||Compression type||Color mode||File Size|
- MRC at Wikipedia: https://en.wikipedia.org/wiki/Mixed_raster_content
- About MRC at ABBYY website: https://abbyy.technology/en:features:ocr:pdf_mrc_export
- About MRC at PDF/A: https://www.pdfa.org/pdfa-for-scanned-documents-%C2%96-paper-becomes-digital/