Image aspect ratio conversion processing apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHiroyuki Fukuoka, Koji Takahashi, Hisataka Hirose
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Abstract
An image processing apparatus, for processing a compressed image signal corresponding to an image obtained by optically compressing an object image with a predetermined compression rate, receives the compressed image signal, effects an expansion process on the compressed image signal according to the compression rate thereof, and extracts and releases an image signal corresponding to a part of the image represented by the image signal formed by the expansion, thereby enabling to display a distortion-free image on a monitor.
Claims7
An image conversion processing apparatus for converting a compressed image signal corresponding to a compressed image, formed by compressing an image having a first aspect ratio with a predetermined compression ratio in a horizontal direction, into an image signal corresponding to an image having a second aspect ratio different from the first aspect ratio, said apparatus comprising:
- designation means for designating an expansion ratio corresponding to the predetermined compression ratio;
- and
- image signal processing means for performing thinning-out processing on the compressed image signal using a thinning-out ratio corresponding to the expansion ratio designated by the designation means, the thinning-out processing being performed so as to thin out, in a vertical direction, an image represented by the compressed image signal.
An image conversion processing apparatus for inputting a compressed image signal corresponding to a compressed image formed by compressing an image having a first aspect ratio using a predetermined compression ratio in a horizontal direction, and converting the compressed image represented by the compressed image signal into an image having a second aspect ratio different from the first aspect ratio in order to display a converted image, said apparatus comprising:
- designation means for designating an expansion ratio corresponding to the predetermined compression ratio;
- image signal processing means for outputting an image signal corresponding to the image having the second aspect ratio by performing thinning-out processing on the compressed image signal using a thinning-out ratio corresponding to the expansion ratio designated by the designation means, the thinning-out processing being performed so as to thin out, in a vertical direction, the image represented by the compressed image signal;
- and
- image display means which includes a picture screen having the second aspect ratio, the image display means for displaying the image corresponding to the image signal output by the image signal processing means.
Dependencies are inferred from the claim text.