Real-time edge processing unit

Details Real-time edge processing unit Real-time edge processing unit

1978-04-21

1980-07-15

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 514

Patent

active

042131502

ABSTRACT:
A digital machine for detecting and processing pictorial edges in video data. The invention mechanizes, in parallel, three different processing techniques, the outputs of which are combined in a selectable manner to generate processed and enhanced video data. The first parallel processor convolves four inter-related 3.times.3-element masks with the 2-dimensional video input data to locate the pictorial edges, to determine the edge directions, to execute edge connectivity logic, and to calculate certain edge statistics. The second parallel processor implements a 3.times.3 element, low or high pass image filter, and an adaptive threshold filter. Both the first and the second parallel processors use Fast-Form algorithms which allow data processing in real time with a minimum of components. The third parallel processor operates on the video data in serial form to generate the video output from the edge processing unit. The third processor is interconnected with the first two processors so as to process and enhance selected features of the serial video data in accord with the outputs from the first two processors.

REFERENCES:
patent: 3621129 (1971-11-01), Fisher
patent: 3641268 (1972-02-01), Beck
patent: 3988602 (1976-10-01), Gorsica
patent: 4074231 (1978-02-01), Yajima et al.
Robinson et al., "Detection and Coding of Edges Using Directional Masks", Spie vol. 87, Advances in Image Transmission Techniques (1976), pp. 117-125.

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