| 单词 | raster scan |
| 释义 | > as lemmasraster scan raster scan n. chiefly Electronics a line by line scan of area by an electron beam or other scanning device to read or produce an image (on a television screen, computer monitor, etc.); an image generated by such a scan. ΚΠ 1950 Electronics 23 107 The h.v. time of rise for the sweep can be achieved by use of either (a) a modified raster scan employing hard valves, or (b) H-filled thyratrons. 1973 Physics Bull. May 275/1 A flying spot performs a raster scan of the whole picture and with the help of a photodetector transforms the entire optical information—spots and all—into the memory of a large online computer. 2002 E. Falkner & D. Morgan Aerial Mapping (ed. 2) vii. 49 Pixels extracted from the raster scan of a photograph could be as small as..1/5000 in. raster scan raster scan v. chiefly Electronics transitive. = raster v. ΚΠ 1967 Appl. Physics Lett. 10 227 This was done by sampling the acoustic field with an ordinary microphone which was used to raster scan a plane. 1970 New Scientist 4 June (Suppl.) 7/2 The screen can be ‘raster-scanned’ as on a TV screen (i.e. the light is deflected across the screen in a series of lines gradually moving to the bottom). 2002 J. D. Gibson Communicat. Handbk. (ed. 2) 94-1 A facsimile image is formed when a document is raster scanned by a light sensitive electronic device. < as lemmas |
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