Rendered image data processing and optical flow calculation

A computer implemented method of determining optical flow vector data for a rendered scene using template data and search data, the method comprising:

• obtaining motion vector data based on geometry data representing the rendered scene;
• obtaining template data derived from a portion of a first frame of image data representing the rendered scene;
• obtaining search data derived from a portion of a second frame of image data representing the rendered scene;
• performing a block matching procedure, using the template data, the motion vector data, and a set of offset positions to be applied to the search data, to identify a portion of the search data;
• and
• determining optical flow vector data comprising an optical flow vector corresponding to the template data representing a spatial offset between the template data and the identified portion of the search data.

A non-transitory computer-readable storage medium comprising computer-executable instructions which, when executed by a processor, cause the processor to:

• obtain motion vector data based on geometry data representing the rendered scene;
• obtain template data derived from a portion of a first frame of image data representing the rendered scene;
• obtain search data derived from a portion of a second frame of image data representing the rendered scene;
• perform a block matching procedure, using the template data, the motion vector data, and a set of offset positions to be applied to the search data, to identify a portion of the search data;
• and
• determine optical flow vector data comprising an optical flow vector corresponding to the template data representing a spatial offset between the template data and the identified portion of search data.