Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-01-06
1990-03-27
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358302, H04N 1393
Patent
active
049125664
ABSTRACT:
An image recording apparatus with a variable magnification capability includes: a recording unit for recording an image by scanning a photosensitive material with a laser beam or the like; a circuit for generating an image recording signal for modulating the laser beam based on an image signal; an inputting unit for setting a desired magnification; and an adjusting circuit for adjusting the image recording signal based on the desired magnification. The adjusting circuit includes a circuit for setting the size of a standard image dot, and for changing the size, along the scanning direction of the beam, of a portion of the dots to obtain a desired degree of magnification/reduction of the image. The size of the standard dot is defined by a reference signal of a predetermined frequency. The size of the modified dots is defined by changing the frequency of the reference signal for the modified dots. The final image is comprised of a large number of the standard dots intermixed with a smaller number of the modified dots.
REFERENCES:
patent: 4470074 (1984-09-01), Yamada
patent: 4547814 (1985-10-01), Hirosawa
patent: 4617578 (1986-10-01), Nezu
Britton Howard W.
Dainippon Screen Mfg. Co,. Ltd.
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