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Understanding Visual Illusions: How Depth Cues Mislead Our Perception of Size

Gregory explains visual illusions by highlighting how we are deceived into using depth cues in images that can distort our perception. He discusses how these cues lead us to misjudge the scale of various elements within a picture, resulting in inaccurate assumptions about size. The Ponzo, Muller-Lyer, and Hering illusions serve as key examples, demonstrating how our brains interpret 2D images as 3D, causing discrepancies in our perception of actual sizes. This exploration sheds light on the intriguing interplay between perception and visual representation.

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Understanding Visual Illusions: How Depth Cues Mislead Our Perception of Size

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Presentation Transcript

  1. Gregory explained visual illusions by claiming that we are tricked into using cues in an image to perceive depth when it’s not actually there. This makes us scale some bits of the image up and other bits down but that makes us ‘guess’ wrongly about what’s happening in the picture. Misapplying the depth cues (assuming that a 2D image is actually 3D) makes things appear to be different sizes when in fact they’re not. The Ponzo, Muller-Lyer and Hering illusions can all be explained like this.

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