TIFF stands for Tagged Image File Format, a file format developed by Aldus and Microsoft for scanner and desktop computer publishing software to store black and white, grayscale, and color images. Now it has become an important file format in publishing multimedia CD-ROM. Although TIFF has a longer history than other file formats, it is still the most widely used industry standard bitmap file format, mainly due to the fact that TIFF's specifications have been improved many times.

 

TIFF bitmaps can be of any size and resolution. In theory, it can be infinitely deep, i.e. 1-8 bits, 24 bits, 32 bits (CMYK mode) or 48 bits (RGB mode) per sample point.

 

The TIFF format can encode grayscale, J-key, CMYK, indexed color, or RGB modes. It can be saved in compressed and uncompressed formats. Almost any application that works with bitmaps can handle the TIFF file format - whether it's embedding, printing, trimming, or editing the bitmap.

 

 

The TIFF format can contain compressed and uncompressed pixel data. The compression method (LZW) is non-lossless (the data of the image is not reduced, that is, the information is not lost during processing) and can produce a compression ratio of about 2:1, which can reduce the original file to about half.

 

The current version of the TIFF format supports high-resolution color, which divides different parts of an image into chunks, or chunks of data. For each block part, a logo is saved which provides information about what the block looks like. The advantage of blocky is that packages that support TIFF only need to save the portion of the image currently displayed on the screen. The parts of the image that are not displayed on the screen are kept on the hard drive until they are loaded into memory when needed. This is important when editing a very large, high-resolution image.

 

 

 

An EPS file is a PostScript file that contains header information that enables other applications to embed the file within the document. EPS files also have some limitations that do not apply to standard PostScript files. These restrictions are mainly rules to ensure that EPS files can be inserted into different files without damaging the file. For example, in Microsoft Word, you can embed an ESP file in a Word, or in a Word document. The most popular use of EPS files is to embed them in desktop publishing files, especially those created by PageMaker or Quark XPress. Desktop color separation (DCS) was developed by Quark for Process color processing. DCS images are EPS cells or images that consist of 5 parts: a low-resolution screen preview, plus layers of cyan, magenta, yellow, and black. DCS2.0 files can include more than 4 sets of colors, and can also include a certain number of spot colors or high-fidelity color separations.

 

 

 

 

JPEG file format - Best known as the Joint Photographic Experts Group standard for extremely dark images. Now, it has risen to become the main format for compressed files published in print and on the World Wide Web.

 

 

 

The original JFIF file format specification allowed 8-bit grayscale images and 24-bit RGB images; However, Adobe has "modified" this format so that it can also handle data in 32-bit CMYK mode. However, most layout applications can't actually separate CMYK mode JPEG images, so this change by Adobe doesn't make much sense. The JPEG file format allows the use of variable compression methods to save 8 -, 24 -, 32-bit depth of the image. For example, when saving a Photoshop image in JPEG format, Photoshop gives a variety of saving options: low compression, medium compression, high compression and the best resolution. Experiments have shown that when printed or viewed on a display, JPEG can generally compress an image to one-tenth of its original size without noticeable differences. The image is broken down into small squares of 8×8 pixel image units. This JPEG distortion is sometimes found in news images that are greatly compressed before electronic transmission and subsequently printed at high magnification.