Invented by Adobe Systems over 20 years ago, the Portable Document Format (PDF) is now an open standard for electronic document exchange maintained by the International Organization for Standardization (ISO). When you convert documents, forms, graphics, and web pages to PDF, they look just like they would if printed.
PDF
TrueType hinting use a program inside the TrueType file to modify the outlines for fonts. This allows it to do clever things like optimise... What is CCITT data? CCITT is used to compress black and white image data. Using Huffman encoding, the data is squeezed into a much... How does CCITT compression work? CCITT encodes black and white data. It does this by encoding runs of black or white pixels. We can... It is actually possible to extract some raw images from the PDF file. In general, images do not exist inside a PDF file –... In theory the PDF file format is specified in detail and is very precise. In practice, you meet alsorts of ‘interesting problems’ – the... Access to PDF files can be secured so that not just anyone can open them. This is achieved by encryption – the bytes in... 
