Reference and non-reference video quality evaluation

摘要

Devices and methods for determining image quality using full-reference and non-reference techniques. Full reference image quality may be determined prior to output of an image or video frame from an image sensor processor by temporarily retaining image data from the image sensor and comparing processed image data of the image to the retained, non-processed image data of the same image. Full reference image quality determination may be assisted by a heuristic-based fault indicator. Image quality may also be determined by a non-reference technique of matching the image to one of various scenarios that are associated with sets of heuristics and applying the heuristics of the particular scenario to the image. Instead of relying on a nominal frame rate, video timing quality may be determined by comparing the capture time interval between successive video frames to the presentation time interval of the same video frames.

主权项

1. A device, comprising:
an image sensor for capturing image data; an image sensor data processor configured to receive image data from the image sensor for creating an image or video frame output, said image sensor data processor comprising:
one or more image data processing components configured to process, as part of creating the image or video frame output, the image data from the sensor;a buffer configured to temporarily store the image data for the image or video frame output prior to processing the image data into processed image data by at least one of the one or more data processing components for the image or video frame output;a reference image data quality comparator configured to:
perform as part of creating the image or video frame output, a comparison of the image data from the buffer to the processed image data, wherein the processed image data has been processed by the at least one of the one or more image data processing components as part of creating the image or video frame output; andoutput a quality indicator, based on the comparison, for the processed image data for the image or video frame output; andan output interface configured to output the image or video frame to complete creation of the frame.