Determining variance of a block of an image based on a motion vector for the block

A computer system for determining a variance for a pixel block, the computer system comprising:

• a processor;
• and
• a memory storing instructions for execution by the processor, the instructions causing the processor to:
• identify a motion vector for the pixel block, the motion vector being associated with a second pixel block of a reference frame;
• determine a cost for the pixel block, the cost indicating a degree of similarity between the pixel block and the second pixel block;
• and
• determine the variance for the pixel block based on the cost.

A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to execute a method for determining a variance for a pixel block, the method comprising:

• identifying a motion vector for the pixel block, the motion vector being associated with a second pixel block of a reference frame;
• determining a cost for the pixel block, the cost indicating a degree of similarity between the pixel block and the second pixel block;
• and
• determining the variance for the pixel block based on the cost.