Image processing device and method
AssigneeSony Group Corporation
InventorTakeshi TSUKUBA
Life of this patent
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Abstract
The present disclosure relates to an image processing device and method that allow reduction in coding efficiency to be suppressed. A pixel value of a chroma component is predicted by linear prediction from a pixel value of a reference image of a luma component whose pixel location is changed by using a filter, and a prediction image of the chroma component is generated. A chroma component of encoded data in which an image is encoded is decoded by using the generated prediction image. The filter is selected on a basis of information regarding a pixel location of the chroma component and information regarding a color format. The present disclosure is applicable, for example, to an image processing device, an image encoding device, an image decoding device, or the like.
Claims13
An image processing device (100) comprising:
- a prediction unit (114) that predicts a pixel value of a chroma component by linear prediction from a pixel value of a reference image of a luma component whose pixel location is changed by using a filter, and generates a prediction image of the chroma component, the filter being selected on a basis of information regarding a pixel location of the chroma component, relative to a pixel location of the reference image of the luma component, and information regarding a color format;
- a decoding unit (111) that decodes, by using the prediction image, a chroma component of encoded data in which an image is encoded, the prediction image being generated by the prediction unit;
- and
- a filter selection unit (161) that selects a filter on the basis of the information regarding the pixel location of the chroma component, relative to the pixel location of the reference image of the luma component, and the information regarding color format, the filter changing the pixel location of the reference image of the luma component, wherein
- the prediction unit is configured to predict the pixel value of the chroma component by linear prediction from the pixel value of the reference image of the luma component whose pixel location is changed by using the filter, and generate the prediction image of the chroma component, the filter being selected by the filter selection unit.
An image processing method comprising:
- selecting a filter on the basis of the information regarding a pixel location of a chroma component, relative to a pixel location of a reference image of a luma component, and information regarding color format, the filter changing the pixel location of the reference image of the luma component;
- predicting a pixel value of the chroma component by linear prediction from a pixel value of the reference image of the luma component whose pixel location is changed by using the filter, and generating a prediction image of the chroma component;
- and
- decoding, by using the generated prediction image, a chroma component of encoded data in which an image is encoded.
An image processing device comprising:
- a prediction unit that predicts a pixel value of a chroma component by linear prediction from a pixel value of a reference image of a luma component whose pixel location is changed by using a filter, and generates a prediction image of the chroma component, the filter being selected on a basis of information regarding a pixel location of the chroma component, relative to a pixel location of the reference image of the luma component, and information regarding a color format;
- and
- an encoding unit that encodes, by using the prediction image, a chroma component of an image, the prediction image being generated by the prediction unit;
- and
- a filter selection unit that selects a filter on the basis of the information regarding the pixel location of the chroma component, relative to the pixel location of the reference image of the luma component, and the information regarding color format, the filter changing the pixel location of the reference image of the luma component, wherein
- the prediction unit is configured to predict the pixel value of the chroma component by linear prediction from the pixel value of the reference image of the luma component whose pixel location is changed by using the filter, and generate the prediction image of the chroma component, the filter being selected by the filter selection unit.
An image processing method comprising:
- selecting a filter on the basis of the information regarding a pixel location of a chroma component, relative to a pixel location of a reference image of a luma component, and information regarding color format, the filter changing the pixel location of the reference image of the luma component;
- predicting a pixel value of the chroma component by linear prediction from a pixel value of the reference image of the luma component whose pixel location is changed by using the filter, and generating a prediction image of the chroma component;
- and
- encoding, by using the generated prediction image, a chroma component of an image.
Dependencies are inferred from the claim text.