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all the same length, as required in a raster image which
does not use the raster area feature.
The raster area represents a boundary. Within this
boundary the printer zero-fills missing rows and fills in
short rows to the edge of the raster area. However, in
addition to filling to the boundaries of the raster area, the
printer also clips any raster line which extends beyond the
boundary. Thus, if an image extends beyond the raster area,
then that portion of the image is not printed.
When the raster area reduction techniques are used in
conjunction with the raster compression techniques, a
considerable savings in transmitted data can be realized.
This results in a saving of host storage requirements and
data transmission time. However, these reduction
techniques do not reduce the amount of printer memory
required for page formatting.
6-4 Raster Graphics6-4 Raster Graphics