Linked by Thom Holwerda on Sat 11th Aug 2012 14:31 UTC
PDAs, Cellphones, Wireless "I decided to write this post after having too many heated discussions with many users across many blogs. After hearing repeatedly; 'The iPad will have a better display' or 'It sucks because it's not Retina' I figured it was time to break the argument down and dispel the 'Retina' myth." Fantastic post at The Verge.
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izomiac
Member since:
2006-07-26

I'm not sure how you disagree. I was speaking of how ganglia primarily transmits differences between photoceptors down the optic nerve (e.g. only one of three reporting to that ganglion sees light). There's also some motion processing in the retina.

It's more the lateral geniculate nuclei in the thalamus that "interpolates" data from the optic tract and transcodes it for the cortex (IMHO it's more akin to lossy compression, but there's decentralized single processing as well). The cortex is where all signals merge and we get additional postprocessing. I'm not sure if it's the frontal or occipital lobe's cortex that give rise to optical illusions, hysteric blindness, and the various forms of blindsight, which are the more obvious examples of "interpolation" going wrong.

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unclefester Member since:
2007-01-13

The image from the lens is inverted and then must
pass through the blood vessels of the retina before being converted to an elctrical signal. This produces a a massively distorted image which must be rectified via postprocessing in the visual cortex.

In theory the eye has at least 16MP (and possibly >500MP) resolution but only the central 2 degrees of vision has accurate colour resolution.

Our vison is essentially a low resolution continuous "scan and pan" movie which is comprehensively filtered, upscaled and interpolated to produce a "meaningful" (if largely inaccurate) visual narrrative. A crude analogy is getting a drunk with a handheld VCR camera to film Lawrence of Arabia. Then postprocessing the raw VCR video using a massively powerful computer to convert the images to a 70mm wide-format film.

Reply Parent Score: 3