Template matching-based prediction method and apparatus

An apparatus for prediction based on template matching, the apparatus comprising:

• a non-transitory memory having processor-executable instructions stored thereon;
• and
• a processor, coupled to the non-transitory memory, configured to execute the processor-executable instructions to facilitate:
• performing matching search separately in at least two reference images of a to-be-processed unit based on a current template to obtain, at each time of the matching search for a given reference image, one set of motion information, one unidirectional matching template, and one unidirectional template distortion value that are corresponding to the given reference image, wherein the current template comprises a plurality of reconstructed pixels with a preset quantity at preset positions in a neighboring domain of the to-be-processed unit, and the unidirectional template distortion value represents a difference between the current template and the unidirectional matching template;
• determining, as target motion information of the to-be-processed unit, motion information corresponding to a smallest one of the obtained unidirectional template distortion values;
• and
• constructing a predicted value of the to-be-processed unit based on the target motion information.

A method for prediction based on template matching, the method comprising:

• performing matching search in a first reference image of a to-be-processed unit based on a current template to obtain first motion information, a first matching template, and a first template distortion value that are of the to-be-processed unit, wherein the current template comprises a plurality of reconstructed pixels with a preset quantity at preset positions in a neighboring domain of the to-be-processed unit, and the first template distortion value represents a difference between the first matching template and the current template;
• updating a pixel value of the current template based on a pixel value of the first matching template;
• performing matching search in a second reference image of the to-be-processed unit based on the updated current template to obtain second motion information, a second matching template, and a second template distortion value that are of the to-be-processed unit, wherein the second template distortion value represents a difference between the second matching template and the updated current template;
• and
• determining a weighted predicted value of the to-be-processed unit based on the first motion information and the second motion information when the second template distortion value is less than the first template distortion value.