Method and apparatus for image detail enhancement using...

Details Method and apparatus for image detail enhancement using... Method and apparatus for image detail enhancement using...

2006-11-21

2006-11-21

Hsia, Sherrie (Department: 2622)

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

Reexamination Certificate

active

07139036

ABSTRACT:
An image detail enhancement method and apparatus that is suitable for different types of digital images, regardless of their signal frequency range or noise level. The detail enhancement apparatus has multiple filters termed, detail filter bank. A detail filter can be e.g. a high pass filter (HPF) or a band pass filter (BPF). In a detail filter bank, each detail filter has a pass band covering a specific frequency range and can therefore be used to obtain the detail signal in the corresponding frequency range from the original signal. The detail signals from those detail filters can then be processed before added back to the original signal as enhancements. This provides image detail enhancement that is suitable for different types of digital images (regardless of their signal frequency range or noise level).

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