Abstract
T246 effect of region of interest (ROI) on the overall image quality assessment was studied using subjective rating method and objective psychophysiology measurement methods (e.g., event-related potentials (ERPs) technology). Different image quality was acquired by compressing only the ROI or background area with different $\boldsymbol{\sigma}$ values of Gaussian Kernel Function. Also, the amplitude and latency of P300 (ERPs component at about 300–550ms) changed with different compressed types. The ROI compressed stimuli had earlier and higher P300 component than that of NROI compressed stimuli. The results showed that it was easier to detect the difference between original image and impaired image of ROI compressed stimuli than that of NROI compressed stimuli.
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