Encoding apparatus and encoding method as well as decoding apparatus and decoding method

An encoding apparatus, comprising:

• an encoding unit configured to encode an input image by a non-reversible encoding method;
• a database configured to:
• register a plurality of texture components;
• and
• register a plurality of bases of the plurality of texture components, wherein the plurality of bases is obtained based on conversion of each texture component of the plurality of texture components into a basis;
• a registration unit configured to:
• register a basis of the texture component into the database;
• temporarily register the basis of the texture component of the plurality of texture components of the input image as a basis of a new texture component into the database;
• and
• definitively register the basis of the new texture component based on satisfaction of a given condition;
• and
• a transmission unit configured to transmit identification information and encoded data, wherein
• the identification information is for identification of the match component from among the plurality of texture components registered in the database,
• the match component is a texture component that matches with the input image, and
• the encoded data is obtained by encode the input image.

An encoding method, comprising:

• encoding an input image by a non-reversible encoding method;
• registering a plurality of texture components in a database;
• separating a low frequency component of the input image from the input image;
• generating a restoration component for each texture component of the plurality of texture components registered in the database, wherein
• the restoration component restores a texture component of the input image, and
• the restoration component is generated based on a basis synthesis in which the low frequency component of the input image and a basis of a texture component of the plurality of texture components are used;
• determining, as a match component, the restoration component whose error with respect to the input image is a minimum from among a plurality of restoration components generated for the plurality of texture components registered in the database;
• and
• transmitting identification information and encoded data, wherein
• the identification information is for identification of the match component from among the plurality of texture components registered in the database,
• the match component is a texture component that matches with the input image, and
• the encoded data is obtained by encoding the input image.

An encoding method, comprising:

• encoding an input image by a non-reversible encoding method;
• registering a plurality of texture components;
• and
• registering a plurality of bases of the plurality of texture components, wherein the plurality of bases is obtained based on conversion of each texture component of the plurality of texture components into a basis;
• registering a basis of the texture component into the database;
• temporarily registering the basis of the texture component of the plurality of texture components of the input image as a basis of a new texture component into the database;
• and
• definitively registering the basis of the new texture component based on satisfaction of a given condition;
• and
• transmitting identification information and encoded data, wherein
• the identification information is for identification of the match component from among the plurality of texture components registered in the database,
• the match component is a texture component that matches with the input image, and
• the encoded data is obtained by encoding the input image.

A decoding apparatus, comprising:

• a reception unit configured to receive encoded data and identification information from an encoding apparatus, wherein
• the encoded data is obtained by encode of an input image by a non-reversible encoding method,
• the identification information is for identification of a match component that is a texture component that matches with the input image,
• the match component corresponds to a restoration component whose error with respect to the input image is a minimum from among a plurality of restoration components generated for a plurality of texture components,
• the plurality of restoration components is generated by the encoding apparatus based on a first basis synthesis in which a first decoded image and a basis of a texture component of the plurality of texture components are used,
• the encoded data is decoded into the first decoded image by the encoding apparatus, and
• the restoration component restores a texture component of the input image;
• a decoding unit configured to decode the encoded data into a second decoded image;
• a database configured to:
• register the plurality of texture components;
• and
• register a plurality of bases of the plurality of texture components, wherein the plurality of bases is obtained based on conversion of each texture component of the plurality of texture components into a basis;
• a basis synthesis unit configured to generate a restored component based on a second basis synthesis in which the second decoded image or a low frequency component of the second decoded image and a basis of the match component are used;
• and
• a synthesis unit configured to synthesize the restored component, the second decoded image and the match component, wherein
• the match component is identified from among the plurality of texture components registered in the database, and
• the match component is identified by the identification information.

A decoding method, comprising:

• receiving encoded data and identification information from an encoding apparatus, wherein
• the encoded data is obtained by encoding an input image by a non-reversible encoding method,
• the identification information is for identification of a match component that is a texture component that matches with the input image,
• the match component corresponds to a restoration component whose error with respect to the input image is a minimum from among a plurality of restoration components generated for a plurality of texture components, and
• the plurality of restoration components is generated by the encoding apparatus based on a first basis synthesis in which a first decoded image and a basis of a texture component of the plurality of texture components are used,
• the encoded data is decoded into the first decoded image by the encoding apparatus;
• restoring a texture component of the input image;
• decoding the encoded data into a second decoded image;
• registering the plurality of texture components;
• and
• registering a plurality of bases of the plurality of texture components, wherein the plurality of bases is obtained based on conversion of each texture component of the plurality of texture components into a basis;
• generating a restored component based on a second basis synthesis in which the second decoded image or a low frequency component of the second decoded image and a basis of the match component are used;
• and
• synthesizing the restored component, the second decoded image and the match component, wherein
• the match component is identified from among the plurality of texture components registered in the database, and
• the match component is identified by the identification information.