Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1998-01-22
2000-09-19
Hsia, Sherrie
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348621, 348451, 348452, H04N 521
Patent
active
061220175
ABSTRACT:
A method and system for combining the information from one video field, or multiple video fields in a single, high quality still image. A reference field and auxiliary fields are selected and an orientation map is constructed for the reference field. Motion maps are constructed to model displacement between the reference and auxiliary fields. The auxiliary fields are directionally interpolated using orientation maps. A merge mask is used to mask of certain pixels which should not be used in the final enhanced image. A weighted average is then formed from the reference field pixels which have not been masked off. A final still image is obtained after additional horizontal interpolation. Post-processing might be used to further sharpen the image. The method and system are applicable to both the luminance and chrominance components of the video image. The method and system serve to reduce the noise, as well as the luminance and color aliasing artifacts associated with the reference field, while enhancing its resolution, by utilizing information from the auxiliary fields.
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Hewlett--Packard Company
Hsia Sherrie
LandOfFree
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