Image compression apparatus, and image compression program storage medium
AssigneeFuji Photo Film Co., Ltd.
InventorMitsuru Mushano
Life of this patent
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Abstract
In an image compression apparatus that compresses an original image consisting of image data after rasterizing, the original image is divided in an area into an edge image and a smooth image. The edge image is subjected to, for example, a reversible compression, and the smooth image is subjected to, for example, a non-reversible compression.
Claims18
An image compression apparatus that compresses an original image consisting of bit map data after rasterizing, the image compression apparatus comprising:
- an area dividing section that divides in an area the original image into an edge image consisting of an assembly of pixels each having a pixel value that is sharply varied as compared with peripheral pixels and a smooth image excepting the edge image from the original image, in accordance with a predetermined evaluation reference;
- an edge image compression section that applies compression processing to the edge image obtained in the area dividing section;
- and
- a smooth image compression section that applies compression processing to the smooth image obtained in the area dividing section.
An image compression program storage medium storing an image compression program which causes an information processing apparatus to operate as an image compression apparatus that compresses an original image consisting of bit map data after rasterizing, when the image compression program is executed in the information processing apparatus, the image compression apparatus comprising:
- an area dividing section that divides in an area the original image into an edge image consisting of an assembly of pixels each having a pixel value that is sharply varied as compared with peripheral pixels and a smooth image excepting the edge image from the original image, in accordance with a predetermined evaluation reference;
- an edge image compression section that applies compression processing to the edge image obtained in the area dividing section;
- and
- a smooth image compression section that applies compression processing to the smooth image obtained in the area dividing section.
Dependencies are inferred from the claim text.