Picture quality measurement using blockiness
AssigneeTektronix, Inc.
InventorsBozidar Janko, Steven D. Maurer
Life of this patent
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Abstract
A picture quality measurement technique using blockiness provides realtime analysis without the use of a reference signal. A field/frame of an image represented by a processed video signal is captured in a bit-map for analysis. The image is filtered to enhance edges and then correlated with a kernel having a size corresponding to the block size of the compression algorithm used in compressing and decompressing the video signal to produce the processed video signal. The correlation results are processed by comparing an average value with the maximum value to produce a picture quality rating for the processed video signal.
Claims10
A method of measuring picture quality of an image represented by a processed video signal based upon blockiness comprising the steps of:
- determining values for edges in the image;
- correlating the edge values with a kernel having spacing corresponding to a specified block size to produce n correlation values;
- and
- generating from the correlation values a picture quality rating value.
Dependencies are inferred from the claim text.