Method of image matching and image processing device

An image processing device comprising:

• a memory;
• and
• a processor configured to:
• obtain a reference image and an image to be matched;
• determine a template image block in the reference image, wherein the template image block is an image block located in a matching window in the reference image;
• determine a first image block in the image to be matched, wherein the first image block is an image block from the image to be matched having a smallest sum of an absolute difference (SAD) with the template image block;
• determine a second image block in the image to be matched, wherein the second image block is an image block from the image to be matched having a smallest gradient information difference with the template image block;
• and
• determine a matching image block in the image to be matched based on the first image block and the second image block.

A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to:

• obtain a reference image and an image to be matched;
• determine a template image block in the reference image, wherein the template image block is an image block located in a matching window in the reference image;
• determine a first image block in the image to be matched, wherein the first image block is an image block from the image to be matched having a smallest sum of an absolute difference (SAD) with the template image block;
• determine a second image block in the image to be matched, wherein the second image block is an image block from the image to be matched having a smallest gradient information difference with the template image block;
• and
• determine a matching image block in the image to be matched based on the first image block and the second image block.