Resolution enhancement system for digital images

Details Resolution enhancement system for digital images Resolution enhancement system for digital images

1996-09-03

2000-02-01

Rogers, Scott

Image analysis

Histogram processing

For setting a threshold

382266, 382299, 358442, G06T 500, H04N 1409

Patent

active

06021256&

ABSTRACT:
An image processing system for providing edge enhancement of low resolution binary image files processes the low resolution data in sections or windows using a binary edge enhancement processor unit to determine whether an edge transition or "kink site" occurs within each window. The edge enhancement processor includes a decision matrix that identifies a pixel based on a calculated gradient magnitude and direction. In one operating mode, the original data in the window is replaced with edge enhanced gray-scale data stored in a look-up table if a kink site is identified. In a second operating mode original data is replaced with higher resolution binary data. To improve speed of operation of the processor, a set of criteria used for determining where enhancement pixels are to be generated has logic operators used for processing the criteria operated simultaneously with a bias provided favoring determinations having closer proximity towards a site likely to require image enhancements. In addition a raster line of pixels is separated into segments and each segment operated on in parallel.

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"Image Makers" by Henry Bortman MacUser, Nov. 1991, pp. 98-103.

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