Method and apparatus for assessing image quality using quantization codes

An apparatus for assessing image quality using quantization codes comprising:

• a filter unit for filtering luminance values of an original image and luminance values of a distorted image;
• a quantization encoding unit for generating phase quantization codes from the output of the filter unit;
• a quantization code difference calculating unit for calculating a difference between the phase quantization code of the original image and the phase quantization code of the distorted image;
• and
• an image quality assessing unit for assessing image quality of the distorted image by using the calculated difference.

A computer program product comprising at least one non-transitory computer-readable recording medium storing computer-executable instructions that, when executed, cause an apparatus to:

• filter luminance values of an original image and luminance values of a distorted image to generate a filtering result;
• generate phase quantization codes from the filtering result;
• calculate a difference between the phase quantization code of the original image and the phase quantization code of the distorted image;
• and
• assess image quality of the distorted image by using the calculated difference.