GDDM V3R2 Base Application Programming Guide
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Hardware required for image processing with GDDM

GDDM V3R2 Base Application Programming Guide
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Three devices that cater specifically for image processing are the IBM 3117 and 3118 Scanners and the IBM 3193 Display Station:
  • The 3117 is a flat-bed scanner. The 3118 has a roller-feed mechanism. Both devices scan documents and convert them into electronic image data. They can each be attached to the 3193 terminal.
  • The 3193 terminal not only displays image data on a screen, but can also carry out some image processing itself, taking some of the load off the host processor.
In this topic and in "Using GDDM's advanced image functions" in topic 17.0, the 3118 is the scanner assumed as the input device, and the 3193 the output device, except where stated otherwise.
Another device that is useful for image processing is the IBM 4224 printer, which can print image data in addition to alphanumerics and graphics.
GDDM also supports image functions on a range of other devices. These are covered in "Device variations for image" in topic 17.12. 



   PICTURE 14          




   Figure 22. Image processing

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