| 摘要 |
A mechanism for facilitating metric conversion of digitized images intended for use with a multi-resolution, multi-application environment is integrated into the encoding and decoding mechanisms of the hierarchical data base, such that stored residual image files contain metric change information. In a preferred embodiment of the invention, the metric conversion operator is executed upon a relatively low spatial resolution file, thereby resulting in a substantial reduction in processing overhead, as advantage is taken of the availability of the reduced size of the lower spatial resolution base file within the hierarchical database, so that a metric conversion may be performed on the relatively small number of pixels within the base file, prior to up-converting the image to a relatively high spatial resolution image, such as a 2048x3072 pixel image for driving a high resolution digital thermal color printer.
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