Forced Choice Methods for Assessing Visual Fidelity. Au, D., Allison, R. S., & Wilcox, L. M. In CVR-CIAN Conference 2025: The Brain and Integrative Vision, pages 63. 2025.
Forced Choice Methods for Assessing Visual Fidelity [link]-1  doi  abstract   bibtex   
Recent increases in display pixel count, frame rate and bit depth have challenged the ability of bandwidth limited links to transmit display data. Modern compressed display links aim to reduce bandwidth while presenting content that is visually indistinguishable from the original uncompressed versions. Subjective image quality assessment is essential and multiple methods have been proposed. Of these, the ISO/IEC 29170-2 flicker paradigm is a rigorous method used to define visually lossless performance. However, it is possible that the enhanced sensitivity to artifacts in the presence of flicker does not predict visibility under natural viewing conditions. Here, we test this prediction using high-dynamic range stereoscopic 3D images and video using two popular test protocols (flicker and non-flicker). As hypothesized, sensitivity to artifacts was greater when using the flicker paradigm, but no differences were observed between the non- flicker paradigms. Results were modeled using the Pyramid of Visibility, which predicted artifact detection driven by moderately low spatial frequencies. Overall, our results confirm the flicker paradigm is a conservative estimate of visually lossless behavior; it is highly unlikely to miss artifacts that would be visible under normal viewing. Conversely, artifacts identified by the flicker protocol may not be problematic in practice.
@incollection{Au:2025aa,
	abstract = {Recent increases in display pixel count, frame rate and bit depth have challenged the
ability of bandwidth limited links to transmit display data. Modern compressed display
links aim to reduce bandwidth while presenting content that is visually indistinguishable
from the original uncompressed versions. Subjective image quality assessment is
essential and multiple methods have been proposed. Of these, the ISO/IEC 29170-2
flicker paradigm is a rigorous method used to define visually lossless performance.
However, it is possible that the enhanced sensitivity to artifacts in the presence of flicker
does not predict visibility under natural viewing conditions. Here, we test this prediction
using high-dynamic range stereoscopic 3D images and video using two popular test
protocols (flicker and non-flicker). As hypothesized, sensitivity to artifacts was greater
when using the flicker paradigm, but no differences were observed between the non-
flicker paradigms. Results were modeled using the Pyramid of Visibility, which predicted
artifact detection driven by moderately low spatial frequencies. Overall, our results
confirm the flicker paradigm is a conservative estimate of visually lossless behavior; it is
highly unlikely to miss artifacts that would be visible under normal viewing. Conversely,
artifacts identified by the flicker protocol may not be problematic in practice.},
	annote = {JUNE 17-19, 2025
SECOND STUDENT CENTRE
YORK UNIVERSITY},
	author = {Domenic Au and Robert S. Allison and Laurie M. Wilcox},
	booktitle = {CVR-CIAN Conference 2025: The Brain and Integrative Vision},
	date-added = {2025-07-26 06:20:14 -0400},
	date-modified = {2025-07-26 06:20:14 -0400},
	doi = {10.25071/10315/42927},
	keywords = {Image Quality},
	pages = {63},
	title = {Forced Choice Methods for Assessing Visual Fidelity},
	url-1 = {https://doi.org/10.25071/10315/42927},
	year = {2025},
	bdsk-url-1 = {https://doi.org/10.25071/10315/42927}}

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