2D becomes 3D when looked at by one eye

  • Thread starter M Grandin
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In summary, the conversation discusses a phenomenon where a 2D photo appears 3D when looked at through a magnifying glass due to the brain processing 3D information from one eye as opposed to both eyes simultaneously. This effect is also utilized in cinema 3D glasses. The conversation also mentions various cues for 3D vision and how they contribute to the perception of depth in images. The person who brought up the topic shares their rough explanation, which is deemed reasonable by others in the conversation. The conversation concludes with a mention of how painters have used tricks to create depth in 2D paintings and how this phenomenon can be seen in everyday photographs.
  • #36
This apple video uses parallax(relative motion of foreground vs background) along with relative size of apples to deliver a partial (In the opening only, when we do least expect) depth experience.
 
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  • #37
plasmon said:
This apple video uses parallax(relative motion of foreground vs background) along with relative size of apples to deliver a partial (In the opening only, when we do least expect) depth experience.
It strikes me as pretty impressive that our brain does its very best with the information it gets. We never evolved a specific skill to watch scenes (and get sense out of them) when they are presented on a flat screen or picture. That is a totally different way for the world to be presented to us but we are (nearly) all happy with films and TV (and even time mobile phone screens. Our binocular vision is SHOUTING at us that it's not real but we just get on with it and enjoy the view. Amazing. I reckon that implies that our brains all have the Plan B - only one eye available - capability, just in case.
 

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