A vector file requiring PostScript language to draw its image. You must have a specific software application to create an EPS file, such as Adobe Photoshop, Adobe Illustrator and QuarkXpress. EPS file is often used when exchanging vector graphics (e.g. logos) that are only to be read but not edited by the receiver, such as sending the file to a print house. An EPS is really a collection of several other image files all in one. EPS files are generated from several sources and are structured to published code constraints. An EPS file has two main parts: The Preview The high resolution image data The preview of an EPS file is necessary to display the image in a page layout application, and the high-resolution portions of the file are necessary for imaging to a particular output device. When you embed (Encapsulate) graphics in a document it is therefore called Encapsulated PostScript or EPS.
Supported by photographs around the world for its good image quality and compression. JPEG is expected to become the international standard for encoding digitized photographs. JPEG’s greatest difference from all other file formats is that it uses Lossy compression. - thus you loose some image quality. Therefore always edit the original picture before saving it in the JPEG format. If you start with a JPEG file that needs edits, save it as an EPS or TIF file. This way, additional information will not get lost and the quality of the original JPEG image will be maintained. The JPEG format supports 24-bits images or up to 16 million colors through the RGB, CMYK, and grayscale color spaces. The use of JPEG images is supported in HTML and Web applications. However, unlike a GIF file, all of the color information is stored in the file. There is no support for transparency in a JPEG file.
Portable Document Format (PDF) is an open file format which makes the PDF format suitable for sharing. These files can be viewed in a professional software program or a free acrobat reader. PDFs can also be opened and edited in Adobe Illustrator if created and saved in the correct format.
PNG: Portable Network Graphics
New image file format with advantages over GIF and JPEG. PNG use lossless compression of data in a wonderful way – the format compress the images so that you will not be able to detect degradation of quality. PNG files are saved with .png extension. PNG file can support both 8-bit or 24-bit colors, using a lossless compression approach. PNG file settings that can be controlled are: Transparency information File defined background color Adobe Gamma correction Use of a PNG file in a Web project is a good fit. However, because of the lack of support for the CMYK color space, and the fact that there can be no color separations, the PNG file is not a good fit in a print production cycle.
Optimal choice since the file format works on both MAC and PC platforms, supports almost any picture bit depth and allow for various form of compression. A TIFF file is the most widely used file format in desktop publishing today. It is a raster-based file that supports the following: RGB, CMYK, Grayscale, Lab, and Indexed color. Note that this flexibility has a drawback: no current system can decode all TIFF file versions which simply mean that you need to test the TIFF file at your hand and see how it behaves. TIFF files can be compressed by using an LZW lossless compression approach or JPEG lossy compression. For high-end print production, it is the best practice to use either LZW compression or a very small amount of JPEG compression. The JPEG compression approach is a lossy compression that will degrade image quality when used in large amounts.
Vector graphics are built from large mathematical functions that returns a consistently scaled image when you supply it a different input size. Vector files rely on a language, such as PostScript, which makes EPS a good file format for saving Vector images. Vector Graphics can be resized to any size without losing quality. Logos are commonly created in this format so they can easily be printed at any size needed, and maintain their quality. Additional attributes of vector images include: Vector-based images are often created/edited in "draw" programs, e.g. Adobe Illustrator Vector-based images have smooth edges Vector-based images create curves or shapes Vector-based images are often used for precise illustrations Vector-based images are easily scalable, due to their use of mathematic formulas
This compression technique reduces the size of a file without sacrificing any original data. It is the most common and looks for areas containing pixels of the same value and encodes the area. In lossless compression, the expanded or restored file is an exact replica of the original fie before it was compressed.
This compression is used only in the JPEG file format and actually loses information when saving and compressing a file. Lossy compression compresses the file at ten times than that of Loss Less compression. It is used for graphics files in which the loss of data - such as information about some of the graphic's several million colors - isn't noticeable.