| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To facilitate progressively transform/encode a digital picture. <P>SOLUTION: The present invention provides progressive rendering through the employment of a multi-resolution lapped transform. The multi-resolution lapped transform outputs transform coefficients such as first transform coefficients and second transform coefficients. A multi-resolution representation can be obtained by utilizing the second transform coefficients of the multi- resolution lapped transform. A color space mapper maps an input image to a color space representation of the input image. The color space representation of the input image is then provided to the multi-resolution lapped transform. A quantizer receives the first transform coefficients and/or the second transform coefficients and provides an output of quantized coefficients for use by a scanner and/or an entropy encoder. The scanner scans the quantized coefficients in order to produce a one-dimensional vector for use by the entropy encoder. The entropy encoder encodes the quantized coefficients received from the quantizer and/or the scanner resulting in data compression. <P>COPYRIGHT: (C)2004,JPO</p> |
