Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1990-02-09
1993-02-09
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358445, 358446, 382 58, H04N 336
Patent
active
051856689
ABSTRACT:
An illuminator for applying light to an image, a reader for photoelectrically reading the light applied image, an amplifier for amplifying an analog signal outputted from the reader, an A/D converter for converting an analog signal outputted from the amplifier into a digital signal, a logarithmic transformer for logarithmically transforming the digital signal outputted from the A/D converter, a first controller for changing the logarithmic transformation of the logarithmic transformer, and a second controller for changing the gain of the digital signal in accordance with a change of the logarithmic transformation characteristic caused by the first controller.
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Canon Kabushiki Kaisha
Kostak Victor R.
Murrell Jeffrey S.
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