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<blockquote data-quote="crycocyon" data-source="post: 139159" data-attributes="member: 13076">Well I've seen ranges of 30-70 in the literature, in terms of discerning discrete shades of grey. If one is comparing them against each other (relative grey values) then it would be in the hundreds. But on their own, around 30-70 is more typical. For example, I work everyday with Hamamatsu digital cameras. On their description of digital imaging, they specify 50.<a href="http://learn.hamamatsu.com/articles/dynamicrange.html" target="_blank">Hamamatsu Learning Center: Dynamic Range</a>Here in the Multimedia Handbook they say 30.<a href="http://books.google.com/books?id=j4JjoLzoJLQC&amp;pg=PA85&amp;lpg=PA85&amp;dq=grey+scale+level+detection+human+eye&amp;source=bl&amp;ots=_xb2jal8Q_&amp;sig=C6R48-UCKL5mA5HK_8Ds-UynGwk&amp;hl=en&amp;sa=X&amp;ei=nEtwUaayCujk4AOu7IHQDg&amp;ved=0CF0Q6AEwBzgK#v=onepage&amp;q=grey scale level detection human eye&amp;f=false" target="_blank">The Multimedia Handbook - Tony Cawkell - Google Books</a></blockquote>

[QUOTE="crycocyon, post: 139159, member: 13076"] Well I've seen ranges of 30-70 in the literature, in terms of discerning discrete shades of grey. If one is comparing them against each other (relative grey values) then it would be in the hundreds. But on their own, around 30-70 is more typical. For example, I work everyday with Hamamatsu digital cameras. On their description of digital imaging, they specify 50. [URL="http://learn.hamamatsu.com/articles/dynamicrange.html"]Hamamatsu Learning Center: Dynamic Range[/URL] Here in the Multimedia Handbook they say 30. [URL="http://books.google.com/books?id=j4JjoLzoJLQC&pg=PA85&lpg=PA85&dq=grey+scale+level+detection+human+eye&source=bl&ots=_xb2jal8Q_&sig=C6R48-UCKL5mA5HK_8Ds-UynGwk&hl=en&sa=X&ei=nEtwUaayCujk4AOu7IHQDg&ved=0CF0Q6AEwBzgK#v=onepage&q=grey scale level detection human eye&f=false"]The Multimedia Handbook - Tony Cawkell - Google Books[/URL] [/QUOTE]

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