Visual heatmaps based on Picture free-viewing of schizophrenic patients and healthy controls

A picture free-viewing experiment was employed. 42 stimulus pictures are presented separately on the screen in the same sequences for all participants, including landscapes, people, social scenes and composite pictures. The eye tracker records the participants' gaze data on the stimulus pictures. Based on the gaze fixation position and duration, the fixation map could be visualized. We applies a 2-d convolution with a gauss filter on the fixation maps to get the visual heatmaps. The participants consist of schizophrenic patients and healthy controls.

The uploaded dataset are images. The images in the folder “heatmaps” are the produced visual heatmaps and each heatmap was named by the rule “participant ID_visual heatmap based on stimulus picture ID”. The images in the folder “stimulus_pictures” are stimulus pictures in the picture free-viewing experiment. Researchers could use this dataset to explore visual pattern analysis.