Tiff was originally created by a company called Aldus, and is now owned by Adobe systems, it is a file format for storing images, including line art and photographs. It was created due to the popularity of scanners and was thought-up to become the standard scanned image file format. It is a popular format for high-colour-depth images and it has also been adapted to accommodate greyscale images.
Tiff is widely popular format for storing the color images of high quality with a great depth of color (including graphics and photos) on a wide variety of computer platforms. It can save images in shades of gray. It is created by specialists from Aidus, which later became a part of Adobe Systems. It is used to scan and recognize text files. The extension correctly interacts with most applications that provide graphics. Tiff-files are the main format of ?? NeXSTEP, where the scan-line images of this extension were borrowed from Mac OS.
A TIFF file is made up of many different blocks which define the palette data or the LZW-compressed body among other things. The byte order is either Motorola or Intel depending on the first word. if it is MM, then you have Motorola byte ordering and likewise if it is II it means you have Intel byte ordering. Each TIFF file begins with an image file header which then points to an image file directory which contains the image data and image information.
Tiff-files can be stored in the formats of Intel or Motorola, which is determined by the first word - II and MM respectively. This is due to the peculiarities of these processors: Intel reads and writes numbers from right to left, Motorola in reverse order. The format is cross-platform and does not require specialized software. They are correctly displayed by popular graphic editors like Adobe Photoshop or CorelDRAW Graphics. Tiff-file can be presented in the form of tags that carry information about the image, or a single file executed using the LZW compression algorithm. Each named Tiff data area begins with the image header pointing to the image file in the directory storing the submitted images and information about them.
Aldus, Adobe Systems
PDF is a file format developed by Adobe Systems for representing documents in a manner that is separate from the original operating system, application or hardware from where it was originally created. A PDF file can be any length, contain any number of fonts and images and is designed to enable the creation and transfer of printer-ready output.
PDF is a cross-platform extension, which is necessary for the visualization of printed materials in electronic form. It is created by specialists from Adobe Systems using separate PostScript resources. PDF documents can exist separately from the OS or hardware tools with which they were developed. Files of this format do not have restrictions on the length, number of types and image options, as they allow you to embed various multimedia tools, scan-line and vector images. They are supported by Adobe Reader and many browsers, providing the plugin is installed.
Each PDF file encapsulates a complete description of a 2D document (and, with the advent of Acrobat 3D, embedded 3D documents) that includes the text, fonts, images and 2D vector graphics that compose the document. They do not encode information that is specific to the application software, hardware, or operating system used to create or view the document.
PDF supports color models CMYK, RGB, shades of gray, and also it has its own technical formats for performing the exchange of finished documents. Any file contains a description of a 2D or 3D document with all the necessary components (scan-line, vector graphics, text and more). The extension does not encode data associated with the software or OS that is used to develop and view the document.