Distributing limited storage among a collection of media...

Details Distributing limited storage among a collection of media... Distributing limited storage among a collection of media...

2005-12-13

2005-12-13

Alam, Shahid (Department: 2162)

Data processing: database and file management or data structures

Database design

Data structure types

C382S232000, C382S244000, C382S250000

Reexamination Certificate

active

06976026

ABSTRACT:
A quality level determining the extent to which each image file is compressed is automatically computed for each image file in a set to ensure that the total size of the compressed image files does not exceed a predefined limit. The compressed size of each image file is initially determined when compressed at a predefined minimum acceptable level and at a nominal level. The relative complexity of the image files is determined based upon their high frequency energy content. As a function of the image file complexity, and starting with the compressed sizes initially determined, the appropriate quality level is determined for compressing each of the image files in an iterative process that ensures the total size of the compressed image files does not exceed the predefined limit, while retaining acceptable quality. Thus, a set of image files can be compressed optimally to fit within a limited storage.

REFERENCES:
patent: 5974182 (1999-10-01), Bryniarski et al.
patent: 6195462 (2001-02-01), Bryniarski et al.
Supangkat, Suhono Harso, and Keinosuke Murakami. 1994. Quantity Control for JPEG Image Data Compression Using Fuzzy Logic Algorithm.IEEE144-145.
Kim, Wook Joong, Jong Won Yi, and Seong Dae Kim. 1999. A Bit Allocation Method Based on Picture Activity for Still Image Coding.IEEE974-977.
Arcangelo, Bruna, and Mancuso Massimo. 2001. JPEG Compression.Factor Control: A New Algorithm.IEEE206-207.

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