| 摘要 |
There is provided a method for compressing image data and creating a compressed image data file. The method performs a step for acquiring a portion of a predetermined size from the image data, and a step for repeating a process of compressing the data of this portion into compressed portion data by a predetermined method while modifying the compression parameter value used in the predetermined method each time the process is executed so as to create a predetermined number of compressed partial data compressed by using different compression parameters, for the entire image data. For each of the compression parameter values, the total of the data size of the compressed partial data compressed by the same compression parameter value is calculated. The compressed image data file is created by compressed partial data compressed by a compression parameter value whose total is not greater than a predetermined threshold value and nearest to the threshold value. ® KIPO & WIPO 2007
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