Editing Raster graphics (section)

==Etymology==
The word "raster" has its origins in the Latin ''[[wiktionary:rastrum|rastrum]]'' (a rake), which is derived from ''[[wiktionary:radere|radere]]'' (to scrape). It originates from the [[raster scan]] of [[cathode-ray tube]] (CRT) [[video monitor]]s, which draw the image line by line by magnetically or electrostatically steering a focused [[electron beam]].<ref>{{cite journal |first1=Michael |last1=Bach |first2=Thomas |last2=Meigen |first3=Hans |last3=Strasburger |year=1997 |title=Raster-scan cathode-ray tubes for vision research – limits of resolution in space, time and intensity, and some solutions  |journal=Spatial Vision |volume=10 |issue=4 |pages=403–14 |pmid=9176948 |doi=10.1163/156856897X00311}}</ref> By association, it can also refer to a rectangular grid of pixels. The word [[rastrum]] is now used to refer to a device for drawing musical staff lines.