Method and apparatus for image compression and manipulation

G - Physics – 06 – F

Patent

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375/12, 354/236.

G06F 3/153 (2006.01) G09G 5/393 (2006.01) G09G 5/42 (2006.01)

Patent

CA 1213085

ABSTRACT Apparatus and methods are disclosed which are most advantageously used in conjunction with a digital computer to provide improved graphics capability. These techniques permit the representation and manipulation of any arbitrarily shaped image in terms of "inversion points". Inversion points defining a region are sorted and stored such that the region shape may be regenerated at a later time from the inversion points. Means are provided to compare existing regions and new regions to be displayed and region operators are provided to specify a precedence between the existing and new regions. Thus, new regions are appropriately "clipped" such that only portions of a new region may actually be displayed to achieve the desired graphic representation.

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