Assessing Perceived Image Quality Using Steady-State Visual Evoked Potentials and Spatio-Spectral Decomposition

A common framework for the evaluation of psychophysiological visual quality assessment

“…In [1], SSVEP have been used for the neurally informed detection of perceived image distortions. In [14] it was shown that the prediction of the MOS from a single observer's SSVEP response is statistically indistinguishable the prediction from a single observer's overt rating.…”

“…In a first step the signal is roughly cleaned from drift artifacts, line noise, and high frequency artifacts by band-pass filtering and potentially downsampled [14,44]. Filtered data is then commonly epoched with regard to a given temporal trigger, i.e.…”

“…the stimulus onset, and simple statistical properties of the epoched signal, i.e. maximal values [7] or ratio of samples exceeding a certain threshold [14] were used as simple rejection method for epochs affected by motion artifact. For reproducible research, details of these preprocessing steps should be reported.…”

“…Research in brain-computer interfacing (BCI) shows that the selected method for spatial filter extraction has significant impact on system performance [11,26,27]. In the context of neurophysiological quality assessment different spatial decomposition techniques such as spatio-spectral decomposition [14], common spatial filters [1], linear discriminant analysis, or pre-selected single channels [4,7] have been used. Temporal features, such as the delay and the magnitude of the ERP waveform [4,7,44], and spectral features such as the amplitudes of elicited SSVEP responses [14], have been found to be related to the perceived quality.…”

“…In the context of neurophysiological quality assessment different spatial decomposition techniques such as spatio-spectral decomposition [14], common spatial filters [1], linear discriminant analysis, or pre-selected single channels [4,7] have been used. Temporal features, such as the delay and the magnitude of the ERP waveform [4,7,44], and spectral features such as the amplitudes of elicited SSVEP responses [14], have been found to be related to the perceived quality. However, for neurophysiological quality assessment, it is not clear yet what the advantages and disadvantages of different combinations of spatial decomposition/channel selection methods and temporal/spectral features are.…”