Filter processing apparatus

Details Filter processing apparatus Filter processing apparatus

2005-06-07

2005-06-07

Do, Anh Hong (Department: 2624)

Image analysis

Image compression or coding

Pyramid, hierarchy, or tree structure

C382S239000, C382S248000, C382S251000

Reexamination Certificate

active

06904177

ABSTRACT:
A two-dimensional wavelet transform processing apparatus, more effectively utilizing hardware resource, is realized with reduced hardware construction. For this purpose, the filter processing apparatus has a vertical DWT processor (901) for performing filter processing on image data and outputting 2 types of data obtained by the processing as 1 pair of data, a rotation unit (903) for rearranging the data outputted from the vertical DWT processor by rotating the data by 90° by 2 pairs and outputting the data, and a horizontal DWT processor (905) for performing filter processing on the image data rearranged by the rotation unit and outputting 2 types of data obtained by the processing as 1 pair of data.

REFERENCES:
patent: 5737448 (1998-04-01), Gardos
patent: 6201897 (2001-03-01), Nixon
patent: 6385329 (2002-05-01), Sharma et al.
patent: 6798917 (2004-09-01), Fujiwara et al.
patent: 404315824 (1992-11-01), None
patent: 10-288342 (1998-10-01), None
Simon et al., “CORDIC-Based Architectures for Efficient Implementation of Discrete Wavelet Transforms”, IEEE International Symposium on Circuits and Systems, vol. 4, 5-1996, pp. 77-80.

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