Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1990-04-26
1993-06-08
Kostak, Victor R.
Facsimile and static presentation processing
Static presentation processing
Attribute control
340703, 358136, 358133, H04N 1104
Patent
active
052184315
ABSTRACT:
A computer program is used to compress color graphics animation sequences for local storage and transmission to remotely networked sites in a significantly reduced size It allows playback of these animations on a wide variety of workstations ranging from personal computer class machines to high end scientific and engineering workstations such as Sun and Silicon Graphics machines. The basic raster image to be compressed is full color with 24-bits per pixel. The compressed form of a raster image is such that the original image can be reconstructed exactly, with no loss of information, on the same computer that compressed it (typically a large mainframe supercomputer) or on the smaller scientific or engineering workstation. A precompression conversion to palette form of a full color image is possible if the computer on which the reconstruction and display is to take place has limited color capabilities; this is the case for lower cost personal computers and workstations. The time required to compress, and the size of the compressed form, are allowed to be data dependent in order to achieve 100 percent lossless compression. The algorithm is specially designed for raster animations, in such a way that a reasonable frame rate (number of frames per second during decompression) can be achieved across a wide range of personal computers, workstations and mainframes; typical frames rates are 5 to 30 frames per second on conventional workstations. A compression ratio achieved is nominally 100:1 for computer generated animations of 3-dimensional scenes or data visualization.
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Conley Robert W.
Gleicher Michael K.
Franz Bernard E.
Kostak Victor R.
Singer Donald J.
The United States of America as represented by the Secretary of
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