Facsimile with user selective compression methods

Details Facsimile with user selective compression methods Facsimile with user selective compression methods

1994-09-27

1996-01-30

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Reduced time or bandwidth for static image communication

358539, 358500, H04N 146, H04N 141, H04N 701

Patent

active

054884837

ABSTRACT:
An apparatus having the G4 method and the JPEG method allows for the selection of standard resolution (200 dpi.times.200 dp) or precision resolution (400 dpi.times.400 dpi) by using a resolution selection key of operation unit 26 in order to improve the operativity and extend the breadth of selection of image quality. For each selection of standard resolution or precision resolution, the resolution and code information for designating quantization table for use with JPEG are stored in RAM 16, with its memory area being backed up by a battery.

REFERENCES:
patent: 4876604 (1989-10-01), Nobuta
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patent: 4974097 (1990-11-01), Kaneko et al.
patent: 5079638 (1992-01-01), Kishi et al.
patent: 5216518 (1993-06-01), Yamagami
Nov. 1989, pp. 564-568, XP91157, G. K. Wallace, "The ISO/OCTTT Standard for Continuous-Tone Image Compression."
"State-of-the-Art Techniques Enrich Color Fax Resolution, Performance," Tasaki, Kenji, Ricoh Company, Ltd. pp. 32-33.

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