Really? I meant to cast a blank that is 50 shades of grey....lol lol lol HaHaHaHa
I'm not sure my eyes could actually detect 50 different shades of grey.
Photographer's explanation:
In the digital world, 256 levels of grey (8-bit) is what is considered photo quality for color depth, and when used for color, the 256 levels are used for each color (red/green/blue) to get 32-bit (8-bit x 3 colors) which yields 16.7million different colors. Our visual perception is not very good at distinguishing from the directly ajacent colors (i.e. you cannot tell color number 4,654,932 from color number 4,654,931 or 4,654,933, but TECHNICALLY they are different.
The The issue with distinguishing between 50 shades of grey has less to do with grey and more to do with white and black. If you take the 256 levels of grey in the digital representation of the grey scale, the first and last values are white and black, which technically are shades of grey (and vice versa, any grey is a shade of black and white...) but our eyes are not good at perceiving the differences in the colors at the ends of the spectrum. The chart below shows 32 shades of grey (30 if you don't count the white and black...). That is a "value" difference of 8 between each block. A grid with 50 shades would have a value difference of a bit over 5 per bock. Most people have no problem at all seeing the differences in the center shades, and well into the upper shades, but the majority of people will not see the differences in the lower values. Some may see the 3rd to the last block, VERY few will be able to perceive the difference between the last dark grey and the solid black, and in the absence of the white block, most will perceive the next grey value as white (our eyesight adjusts to what it is presented with, and will make several shades into the scale SEEM like white when a lighter color is not visible). We are very poor at seeing a single color and not judging it by its surroundings. There are many examples where 2 blocks of a single color are displayed on light and dark backgrounds, and you would swear that the 2 colors are different, because your brain adjusts its perception based on the background.
This brings us back to the original issue. You would be able to percieve the 50 shades of grey, assuming you have the reference black and white, and the 50 shades are separated from that, and presented IN ORDER. If they are not presented in order, you would feel while there were 50 bands, some of the shades were repeated, because they would be viewed with a skewed perception based on their surrounding bands...
(Class dismissed:biggrin
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