PQA600A Datasheet, PDF (4/19 Pages) List of Unclassifed Manufacturers – Picture Quality Analysis System

Datasheet
A: Modulation Sensitivity vs. Temporal Frequency
C: Reference Picture
B: Modulation Sensitivity vs. Spatial Frequency
This model has been calibrated, over the appropriate combinations of
ranges for these parameters, with reference stimulus-response data from
vision science research. As a result of this calibration, the model provides a
highly accurate prediction.
D: Perceptual Contrast Map
The graphs above are examples of scientific data regarding human vision
characteristics used to calibrate the human vision system model in the
PQA600A. Graph (A) shows modulation sensitivity vs. temporal frequency,
and graph (B) shows modulation sensitivity vs. spatial frequency. The
use of over 1400 calibration points supports high-accuracy measurement
results.
Picture (C) is a single frame from the reference sequence of a moving
sequence, and picture (D) is the perceptual contrast map calculated by the
PQA600A. The perceptual contrast map shows how the viewer perceives
the reference sequence. The blurring on the background is caused by
temporal masking due to camera panning and the black area around the
jogger shows the masking effect due to the high contrast between the
background and the jogger. The PQA600A creates the perceptual map for
both reference and test sequences, then creates a perceptual difference
map for use in making perceptually based, full-reference picture quality
measurements.
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