Methods and apparatus for re-scaling image by variable...

Details Methods and apparatus for re-scaling image by variable... Methods and apparatus for re-scaling image by variable...

2005-03-30

2009-06-02

Wang, Jin-Cheng (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Graphic manipulation

C382S298000, C345S698000, C348S581000

Reexamination Certificate

active

07542053

ABSTRACT:
A method includes receiving a sequence of samples that represents a row of pixels in an image. The method further includes selecting a re-scaling factor for at least a portion of the row of pixels. The method further includes selecting a filter from a bank of low pass filters based on the selected re-scaling factor, and low-pass filtering the sequence of samples with the selected filter. The method further includes up-sampling the low-pass-filtered sequence of samples by a factor M with a polyphase filter bank having a windowed sinc(t) characteristic to the up-sampled sequence of samples, and down-sampling the polyphase-filtered sequence of samples.

REFERENCES:
patent: 7158158 (2007-01-01), Fleming et al.
patent: 7239671 (2007-07-01), Wood et al.
patent: 2004/0145501 (2004-07-01), Hung
patent: 2005/0134731 (2005-06-01), Lee et al.
patent: 2005/0196072 (2005-09-01), Zhong
patent: 2006/0039514 (2006-02-01), Radakovic

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