Image encoding apparatus

Details Image encoding apparatus Image encoding apparatus

1989-08-25

1992-06-23

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358426, 358443, H04N 140

Patent

active

051248115

ABSTRACT:
An image encoding apparatus includes a smoothing circuit for smoothing a binary image to be encoded, a binary-encoding circuit for binary-encoding the image smoothed by the smoothing circuit, a sampling circuit for sub-sampling the image binary-encoded by the binary-encoding circuit, and an encoding circuit for encoding the binary image sub-sampled by the sampling circuit. A degree of smoothness of an image by the smoothing circuit and a threshold value for a binary-encoding operation of the binary-encoding circuit can be varied.

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patent: 5050230 (1991-09-01), Jones et al.
"Efficient Facsimile Signal Data Reduction By Using A Thinning Process", NTC '77 Conference Record, vol. 3, 1977, Usubuchi et al., pp. 49:2-1-49:2-6.
"Step By Step Image Transmission and Display From Gross To Fine Information Using Hierarchical Coding", Transactions of IECE of Japan, vol. E63-B, No. 4, Apr. 1980, Yasuda et al., pp. 305-306.

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