![]() At a generic level of description, there are two kinds of computer files: text files and binary files. ![]() Text files can contain plain text, but they are not limited to such. "Text file" refers to a type of container, while plain text refers to a type of content. This allows for high-quality, readable images to be stored in a minimum of space, so that they can be made available on the web. Such files can be viewed and edited on text terminals or in simple text editors.ÄjVu uses technologies such as image layer separation of text and background/images, progressive loading, arithmetic coding, and lossy compression for bitonal (monochrome) images. Warning: this produces large files (but PDF files made by Christoph Sieghart's script are of the same size.) I also wrote the following small bash script some years ago. On most operating systems the name text file refers to file format that allows only plain text content with very little formatting (e.g., no bold or italic types). The ddjvu program, (which is part of the standard djvulibre package), will do this: ddjvu -formatpdf -quality85 -verbose a.djvu a.pdf. DjVu is a computer file format designed primarily to store scanned documents, especially those containing a combination of text, line drawings, indexed color images, and photographs.
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