Image data re-compression device
First Claim
1. An image data re-compression device, comprising:
- a recording medium, in which a plurality of files, each of which is defined by image data, can be recorded, said image data being able to be compressed and recorded to said recording medium;
means for detecting an actual recordable area, in which no image data has been recorded, from said recording medium;
means for re-compressing said image data, which has been recorded in said recording medium, with a compression ratio which is higher than another compression ratio with which said image data has been compressed and recorded to said recording medium, so that a potential recordable area, in which other image data can be recorded, can be generated in said recording medium; and
means for obtaining a number of expanded recordable files, which number is a maximum number of files which become recordable due to a re-compression operation of said re-compressing means, based on said actual recordable area and said potential recordable area which are generated by said re-compression operation.
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Accused Products
Abstract
An actual recordable area in which no image data has been recorded is detected from a recording medium. The actual recordable area is divided by a file size of image data which are compressed with a maximum compression ratio, so that a number of actual recordable files is obtained. A potential recordable area is calculated under conditions under which the image data are to be compressed with a maximum compression ratio, and is divided by the file size so that a number of potential recordable files is obtained. The number of the actual recordable files and the number of the potential recordable files are added to each other, and thus, a number of expanded recordable files is obtained.
72 Citations
11 Claims
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1. An image data re-compression device, comprising:
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a recording medium, in which a plurality of files, each of which is defined by image data, can be recorded, said image data being able to be compressed and recorded to said recording medium; means for detecting an actual recordable area, in which no image data has been recorded, from said recording medium; means for re-compressing said image data, which has been recorded in said recording medium, with a compression ratio which is higher than another compression ratio with which said image data has been compressed and recorded to said recording medium, so that a potential recordable area, in which other image data can be recorded, can be generated in said recording medium; and means for obtaining a number of expanded recordable files, which number is a maximum number of files which become recordable due to a re-compression operation of said re-compressing means, based on said actual recordable area and said potential recordable area which are generated by said re-compression operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for re-compressing image data, which has been compressed and recorded to a recording medium, with a compression ratio which is higher than that with which said image data have been compressed, said device comprising:
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means for detecting an actual recordable area which actually exists in said recording medium; means for obtaining a number of expanded recordable files, which number is a maximum number of files which become recordable by re-compressing said image data, based on said actual recordable area and a potential recordable area which would be generated by re-compressing said image data; and means for indicating a number of files which become recordable by re-compressing said image data with a predetermined compression ratio, based on the number of said expanded recordable files.
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Specification