Signal processing apparatus and signal processing method
OwnerSadayoshi Kanazawainventor
Life of this patent
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Abstract
A signal processing apparatus and signal processing method which can realize a noise reduction filter capable of displaying noise reduction effects of same levels with respect to images scaled to various sizes are provided. The signal processing apparatus and signal processing method select adjacent pixels when executing noise reduction filtering of images DCT coded by 8×8 pixel blocks, and in the case of images changed in block size scaled and DCT coded, pixel closer to the pixel of original image is selected, and thereby, it is possible to assure the width of filter without changing the number of pixels used for filters.
Claims18
A signal processing apparatus, comprising:
- a plurality of filters;
- a determining unit for determining pixels referred to by the filters;
- and
- a selecting unit for selecting one out of the plurality of filters in accordance with image feature values calculated by using pixels selected by the determining unit and thresholds of the image feature values set with respect to each of the plurality of filters.
A signal processing method, comprising:
- a determining step for determining pixels referred to by a plurality of filters;
- and
- a selecting step for selecting one out of the plurality of filters in accordance with image feature value calculated by using pixels selected in the determining step and thresholds of image feature value set with respect to each of the plurality of filters.
Dependencies are inferred from the claim text.