Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-01-13
1990-05-01
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358433, 358460, 358 75, 358456, H04N 140, H04N 146
Patent
active
049223496
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a data communication apparatus for communicating data such as image data and character code data. Background Art
Known examples of conventional communication apparatus of this type are a facsimile apparatus for communicating image data and a Telex for communicating character code data.
However, the facsimile apparatus can communicate only image data, and the Telex can communicate only character code data. For this reason, when data including both image and character code data is to be transmitted, data communication efficiency is degraded because the character code data is transmitted as image data.
In order to eliminate the above drawback, image data and character code data may be divided into different block areas so that the respective block areas can be transmitted independently of each other, to thereby improve data communication efficiency. However, some image data, e.g., halftone image data and color image data, have a variety of image characteristics. Therefore, if such image data is communicated as one block, an image data amount is increased or image data processing is complicated, resulting in poor communication efficiency.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to provide a data communication apparatus which eliminates the above drawback.
It is another object of the present invention to provide a data communication apparatus which divides data into block areas in accordance with data characteristics and communicates the data in units of the block areas.
It is still another object of the present invention to provide a data communication apparatus which divides character code data and image data into different blocks, further divides an image data block in accordance with image characteristics, and communicates the data in units of the blocks.
It is still another object of the present invention to provide a data communication apparatus which converts data in accordance with the type of a destination apparatus and communicates the data.
It is still another object of the present invention to provide a data communication apparatus which divides character code data and image data into different blocks, further divides an image data block in accordance with image characteristics such as a halftone image or a color image, and communicates the data.
It is still another object of the present invention to provide a data communication apparatus which converts halftone image data into binary image data and communicates the data when a destination apparatus does not have a halftone image data processing function but has only a binary image data processing function.
It is still another object of the present invention to provide a data communication apparatus which converts color image data into monochromatic image data and communicates the data when a destination apparatus does not have a color image data processing function but has only a monochromatic image data processing function.
The other objects of the present invention will be apparent from the following embodiments.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a block diagram of an arrangement according to an embodiment of the present invention;
FIG. 2 is a perspective view of a data communication apparatus of the embodiment;
FIG. 3 is a schematic view of image data;
FIG. 4 is a schematic view of an image area separation table;
FIG. 5 is a flow chart of the embodiment;
FIG. 6 is a flow chart of a reception routine;
FIG. 7 is a flow chart for automatically dividing an image area;
FIGS. 8(a) and 8(b) are schematic views of small block data; and
FIG. 9 is a flow chart according to another embodiment of the present invention.
Best Mode of Carrying Out the Invention
An embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a perspective view thereof.
In FIGS. 1 and 2, a reader 10 reads a predetermined original and outputs an electrical si
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Abe Shintaro
Nakamura Kaoru
Britton Howard W.
Canon Kabushiki Kaisha
Vu Kim Yen
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