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AssigneeCanon Kabushiki Kaisha
InventorsKoji Takahashi, Masahiko Enari, Yushi Kaneko
Estimating the term…
An image processing apparatus can deal with a plurality of kinds of video signals. The apparatus includes a circuit for generating a signal indicating the kind of an input video signal, and magnification varying circuit for varying the aspect ratio of an image of the input video signal in accordance with a result of discrimination by the signal generation circuit. The aspect ratio of a pixel (picture element) is automatically corrected in accordance with the input video signal by the above-described circuits. Accordingly, it becomes unnecessary to manually set the aspect ratio of a pixel in accordance with the kind of the input video signal. Hence, operation is greatly simplified.
An image processing apparatus for converting image data between a first digital image signal and a second digital image signal, a vertical-to-horizontal ratio of each pixel of the first digital image signal being different from a vertical-to-horizontal ratio of each pixel of the second digital image signal, said apparatus comprising:
An image processing apparatus, comprising:
An image processing apparatus, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Prior to start of transmission, input or output of the picture signal only: reading or reproducing mode only, e.g. sheet size, resolution
With a telecommunication apparatus, e.g. a switched network of teleprinters for the distribution of text-based information, a selective call…
Picture signal circuits: modification of image resolution, i.e. determining the values of picture elements at new relative positions
Pictorial communication
Term ended 20 Feb 2013 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to an image processing apparatus and method, and more particularly, to an apparatus which can process images of a plurality of kinds of image signals.
2. Description of the Related Art
FIG. 1 is a block diagram of the configuration of the preferred embodiment of the present invention;
FIG. 2 is a block diagram of the configuration of a video decoder 52 shown in FIG. 1;
FIG. 3 is an example of display;
The preferred embodiment of the present invention will now be explained with reference to the drawings.
FIG. 1 is a block diagram of the configuration of an apparatus according to the preferred embodiment of the present invention. In FIG. 1, there are shown an original scanner 30, an interface 32 for a plurality of kinds of video signal inputs, a selection switch 34 between the output of the original scanner 30 and the output of the interface 32, an XY magnification varying processing circuit 36, a printer 38, an operation key/panel unit 40, a system control circuit 42 comprising a microcomputer, and display unit 44.
In the interface 32, there is shown a selection switch 46 for a plurality of kinds of input video signals. A signal discrimination circuit 48 discriminates the kind of input video signal, for example, according to the frequency of the synchronizing signal or the sampling frequency of the video signal. A detailed explanation of the signal discrimination circuit 48 will be provided later. Look-up tables (LUTs) 50 (50a, 50b, 50c and 50d) hold information relating to the aspect ratios of respective types of video signal. A video decoder 52 converts an output video signal from the selection switch 46 into a signal having the same configuration as an output signal from the scanner 30 in accordance with the result of discrimination obtained by the signal discrimination circuit 48.