Computer Graphic Design and Prepress Graphic Processing 500 Q (37-41)

37. What is TrueType technology? What are the characteristics of TrueType fonts?

A: TrueType is a new mathematical font description technology jointly proposed by Apple Computer and Microsoft Corporation. It uses a mathematical function to describe the contour outline of the font, including the font structure, color fill, digital description function, process condition control, grid processing control, additional prompt control and other instructions. TrueType uses the second B-spline curve and straight line in geometry to describe the outline of the font. Its feature is: TrueType can be used for printing fonts as well as for screen display. Because it is described by the instruction, it is Regardless of the resolution, the output is always output at the resolution of the printer. Regardless of whether it is zoomed in or out, the characters are always smooth and no aliasing occurs. However, the quality of Postscript fonts is worse. Especially when the text is too small, it is not very clear.

38. What is the characteristic of Bitmap? Used in what place?

A: Bitmap fonts are screen fonts that are used to display faster. Its characteristic is: Since it is described by dot matrix, it is related to the resolution. When zooming in or zooming out, there may be sawtooth. Bitmap fonts are not smooth when printed, and their quality is not good. Generally not used for output.

39. What are the advantages of TrueType fonts?

A: TrueType fonts have the following advantages: 1 True WYSIWYG fonts. Since True-Type fonts support almost all output devices, they can be output at device resolution regardless of whether they are on a screen, a laser printer, a laser imagesetter, or a color inkjet printer, resulting in a smooth output. 2 support font embedding technology. When saving, all the TrueType fonts used in the file can be embedded into the file in an embedded manner, so that all the fonts in the entire file can be conveniently transferred to other computers for use. Embedded technology ensures that computers without a corresponding font can print in the original font in their original format. 3 operating system compatibility. Both MAC and PC support TrueType fonts, which can open application files directly in the same name without replacing fonts.

40. What is the Postscript language?

A: Postscript is a page description language developed by Adobe Corporation. It is an interface language that the desktop system outputs to output devices and is designed specifically for describing images and text. Postscript describes the image and text on the page using a mathematical formula, and finally translates it into a desired output through a Postscript decoder, such as a display on a screen, or output on a printer or a laser imagesetter. Because the software used by the desktop system includes image software, graphic software, and typesetting software, their functions are also different. When so many softwares work together, they must exchange information according to a certain standardized format. Their common standard is the Postscript language. Postscript is the most popular page description language in the world and it is also the de facto industry standard. Its perfect design makes it a choice of multiple manufacturers' equipment and is supported by numerous softwares. Almost all prepress output devices support PS language. The success of PS language also makes open electronic publishing systems widely popular internationally.

41. What is the characteristic of Postscript language?

A: The biggest feature of Postscript is the ability to process text, graphics, and images in a comprehensive manner. In one page of prints, various elements such as text, lines, graphics, images, flat screens, etc. may be included. Postscript uses these data forms to express and describe in a computer data format, making it possible for graphic and text layouts. . With the Postscript standard, digital data exchange is possible between computers and devices of different manufacturers. It is the basis for the openness of color desktop publishing systems. Another feature of Postscript is that it avoids the dependence of the layout design on the equipment. As long as it conforms to the PS standard, whether it is made by a MAC machine or a PC, you can obtain a common PS code file through the print driver. PS output devices can output correctly according to their own resolution. Regardless of the resolution of the device, there are pages with the same structure. (Author: Liu Wuhui) Continued