Image and video quality assessment

摘要

Evaluating coded video by identifying spatial and temporal errors in the reconstructed video. Spatial errors may be identified by evaluating the severity of each individual error and pooling closely located errors to determine whether the collection of errors is noticeable. Temporal errors may be identified by evaluating the quality of each frame and then pooling consecutive frames to determine whether the collection of frames has errors that may be noticeable if the errors persist within the sequence of consecutive frames. The quality of the frames may be analyzed with any conventional analysis metric. In an embodiment, the quality of the frames may be analyzed using a row-column metric. The calculated analysis metrics may be normalized to accurately compare different metric calculations.

主权项

1. A method for evaluating video data, comprising:
identifying a plurality of errors in a reconstructed video data; comparing a first portion of the reconstructed video data to a first quality threshold, the first portion having an identified error; if a quality value for the first portion is below the first quality threshold, identifying the first portion as failing the evaluation; pooling the identified errors; comparing a second portion of reconstructed video data to a second quality threshold, the second portion having a pool of identified errors; and if a quality value for the second portion is below the second quality threshold, identifying the second portion as failing the evaluation; wherein the second portion of reconstructed video data is larger than the first portion of reconstructed video data and the first quality threshold is smaller than the second quality threshold.