Encoding and decoding methods, and storage medium

An encoding method, applied to an encoder and comprising:

• determining a plurality of search positions around a current block, wherein the plurality of search positions comprise a spatial non-adjacent position of the current block;
• determining gradient information to be blended according to the plurality of search positions;
• and
• determining a prediction value of the current block according to the gradient information to be blended.

A non-transitory computer-readable storage medium storing a bitstream and a computer program, wherein when executed by a processor, the computer program causes the processor to generate the bitstream according to an encoding method, the encoding method comprising:

• determining a plurality of search positions around a current block, wherein the plurality of search positions comprise a spatial non-adjacent position of the current block;
• determining gradient information to be blended according to the plurality of search positions;
• and
• determining a prediction value of the current block according to the gradient information to be blended.