Visual Characteristics of Afterimage under Dark Surround Conditions

Three psycho-visual experiments were carried out to investigate visual afterimage characteristics of high luminance LEDs under dark surround conditions. The results show that the luminance of illumination, exposure time and background luminance are the primary factors influencing the afterimage's duration, the color difference between stimulus and background, and visibility. Besides, visual afterimage characteristics are strongly correlated with the luminance contrast between the stimulus and the background, but not for the color difference with a white background. A third-order polynomial regression model was proposed to accurately estimate the afterimage duration, the color difference between stimulus and background, and visibility. The model performance showed high R-squared, low root-mean-square error (RMSE) and mean absolute error (MAE) values between the predicted and visual characteristics.

Automated summary

The experimental results showed that the luminance of illumination, exposure time, and background luminance are the primary factors influencing the visual afterimage characteristics, with a strong correlation with the luminance contrast between the stimulus and the background. A proposed regression model accurately estimated the afterimage duration, color difference, and visibility, with high R-squared values and low RMSE and MAE values.