Intelligent doubling for low-cost image buffers

Details Intelligent doubling for low-cost image buffers Intelligent doubling for low-cost image buffers

1993-06-30

1996-12-10

Mancuso, Joseph

Image analysis

Image compression or coding

Adaptive coding

382176, 382299, 358467, 395116, G06T 900

Patent

active

055839533

ABSTRACT:
A method and apparatus for achieving an ultra-small or compressed image buffer images at half the resolution and then scales by two to achieve the device resolution. Acceptable quality can be maintained by identifying edge and interior portions of the page image and using this information to scale intelligently. A split-level frame buffer provides this identification of the image components. Further, an extension of block-truncation coding can be used with the split-level frame buffer to provide up to a 16 to 1 compression for an overall compression of up to 64 to 1. Actual techniques to scale these encodings are described along with new encodings for graphics and text designed this high compression of the image.

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