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Mario Ponzo

Satisfactory Essays

We still perceive that the width of the road (object) stays the same but we can see that the visual distance between the lines starts to decrease. This causes the brain to think that the road is heading further into the page and therefore we perceive distance within the image. Such that the light posts at the end of Figure 2 look like they are further away in the image but it is actually only a two dimensional image. The horizon is also valuable in distinguishing distance due to relative height cues. If an object is close to the horizon it appears to be far away from us and therefore we perceive a large distance. If the object is further away from the horizon, say at the top of a picture or bottom then it appears close to the viewer. This can be seen in Figure 3 …show more content…

With motion parallax objects that seem to speed away from you appear as close objects while points that seem to stay in the same position or move with you appear to be distance. This causes depth as we start to distinguish a distance from which way objects are moving and how close or far away they are. Notably the Ponzo illusion (Mario Ponzo 1913) is a useful model in using depth cues to induce the size consistency effect. In this illusion an object which seems “further away” then a “closer” object appears larger. In this study, using a manipulated Ponzo illustration, the number of depth cues present in illustration was varied. Participants in the study were asked to match an altered stimuli by size to a reference stimuli in the illustration. The aim was to examine whether the number of depth cues would influence the magnitude of the Ponzo illusion. It was hypothesized that as the number and type of depth cues in the illusion pattern increased, the participants’ estimates of the stimulus would also

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