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Images and Image Display
Published in Julio Sanchez, Maria P. Canton, William Perrizo, Space Image Processing, 2018
Julio Sanchez, Maria P. Canton, William Perrizo
Since its introduction in 1981, the Personal Computer has supported a host of graphics video systems. The first one, called the Color Graphics Adapter, or CGA, had a maximum resolution of320-by-200 pixels in 16 colors. Other graphics systems that evolved on the original PC were the Hercules Graphics Card, the Enhanced Graphics Adapter (EGA), The PCJr video system (called the Video Gate Array), and the Professional Graphics Controller. In 1987, IBM introduced the PS/2 line with a new assortment of video systems. The new PS/2 video systems included the short-lived Multicolor Graphics Array and the now classic Video Graphics Array, or VGA. VGA’s best resolution is in mode number 18, with 640-by-480 pixels in 16 colors. Its richest color mode is number 19, which supports 256 colors at a resolution of320-by-200 pixels. Other video systems that enjoyed relatively brief periods of success were the 8514/A Display Adapter, the IBM Image Adapter/A, the Extended Graphics Array (XGA), and several high-end video cards based on the Texas Instruments Graphics Architecture (TIGA) processors.
C
Published in Phillip A. Laplante, Dictionary of Computer Science, Engineering, and Technology, 2017
color graphics adapter (CGA) a video adapter proposed by IBM in 1981. It is capable of emulating MDA. In graphic mode, it allows the image to reach 640 × 200 (wide per high) pixels with 2 colors or 320 × 200 with 4 colors.
History of personal computers in Japan
Published in International Journal of Parallel, Emergent and Distributed Systems, 2020
In the early personal computers, alphanumeric characters were shown on the display in 8 dots × 8 dots, and the display resolution of 640 × 200 dots were used to show 80 characters by 25 lines (such as in IBM PC CGA). On the other hand, kanji characters with complex shapes required 16 dots × 16 dots to show, which have a double width of that of alphanumeric characters. Also, in order to display 25 lines of characters the same as alphanumeric characters, the vertical resolution of the display need to have 400 dots which was twice of the resolution of the U.S. system.