Method for the scaling down of data

Image analysis – Image compression or coding – Substantial processing of image in compressed form

Reexamination Certificate

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Details

C382S248000, C382S250000

Reexamination Certificate

active

07373003

ABSTRACT:
A method, system, and data structure for the scaling down of data is provided. At least two blocks of transformed data samples representing at least two blocks of original data samples are received. One of at least two tables of constants is selected wherein each table of constants is capable of reducing the number of transformed data samples by a different factor. The constants taken from the selected table are applied to the at least two blocks of transformed data samples to produce one block of transformed data samples representing one block of final data samples. The data is processed one dimension at a time by multiplying the data in one dimension with selected constants taken from previously developed tables corresponding to the desired scale down factor. Scaling down by different factors in each dimension as well as scaling down in one dimension and scaling up in the other dimension may be achieved. In addition, the de-quantization of the quantized transform coefficients may be accomplished by pre-multiplication of the selected constants when the quantization values are known. In a similar way the re-quantization may be accomplished by a pre-division of the selected constants. Both de-quantization and re-quantization may be combined when the input quantized transform coefficients and output quantized transform coefficients are desired.

REFERENCES:
patent: 5708732 (1998-01-01), Merhav et al.
patent: 5740284 (1998-04-01), Wober et al.
patent: 5875039 (1999-02-01), Ohsawa et al.
patent: 6002809 (1999-12-01), Feig et al.
patent: 6075906 (2000-06-01), Fenwick et al.
patent: 6307968 (2001-10-01), Liguori
patent: 6456745 (2002-09-01), Bruton et al.
patent: 6970179 (2005-11-01), Trenary et al.
patent: 7062098 (2006-06-01), Mitchell et al.
patent: 2005/0117809 (2005-06-01), Mitchell et al.
Hu et al., “Image/Video Spatial Scalability in Compressed Domain”, IEEE Transactions on Industrial Electronics, vol. 45, No. 1, pp. 23-31, Feb. 1998.
Merhav et al., “A Transform Domain Approach To Spatial Domain Image Scaling”, Proc. IEEE Int. Conf. on Acoustics, Speech, and Signal Processing, vol. 4, pp. 2403-2406, May 1996.
Natarajan et al., “A Fast Approximate Algorithm For Scaling Down Digital Images In The DCT Domain”, Proc. Int. Conf. on Image Processing, vol. 2, pp. 241-243, Oct. 23, 1995.
Sethi et al., Adaptive Motion Vector Resampling for Compressed Video Down-Scaling, IEEE, pp. 771-774, 1997.

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