Spatial Dithering - AVS Forum
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post #1 of 1 Old 09-10-2014, 11:32 AM - Thread Starter
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Spatial Dithering

I wonder if anyone has attempted to try to quantify or precisely characterize any spatial dithering that may occur on 60 series Panasonic sets (amongst others).

Does spatial dithering still occur to any significant extent on these later plasma TVs?

If I were to put up an image consisting of a single vertical or horizontal line of a particular colour and brightness, would I see (sub)pixels in other (e.g., adjacent) lines firing?

Other thoughts: When calibrating a set the measurement is often taken from a patch of pixels with (for the sake of argument) the same input values. The measurement therefore provides an average value for the pixels within the patch. One assumption might be that the individual pixels that comprise the patch produce that average amount of light (per unit area). But in the presence of spatial dithering and error diffusion, that assumption needs careful consideration. Is it correct? Another assumption might be that a pixel with a particular input value in a patch will have the same measurable value as that pixel in another context. Again, that assumption is worth thinking about.

Any photographs demonstrating the presence of spatial dithering would be interesting to see. Links and uploads extremely welcome, thank you.

Finally, Vierrafan on AVF produced some very interesting photographs of subfield patterns:

http://www.avforums.com/threads/pana...ering.1593435/

His crafty approach meant he didn't have to use a special high speed camera. His photographs seem to provide indirect evidence that dithering would be necessary (whether temporal or spatial) and it would be fantastic if someone could try his (or an alternative) method to photograph subfields on a newer upper tier plasma.

Thank you.
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