I don’t understand how color has anything to do with it. The checks are just shades of grey. (The cylinder is green, but I don’t think that matters—when I convert the picture to greyscale, the effect is the same.)
Wow! That’s interesting. The square labelled “A” and the square labelled “B” look exactly the same to you? For me, square A looks almost black, and square B looks almost white.
I think that’s an unusual condition. Is that true for all color-blind people, I wonder?
For most people, a grey square adjacent to a black square looks white, and a grey square next to a white square looks black. Most people’s eyes adjust for the background light, and only look at relative differences in whiteness. (This adjustment is done automatically—it isn’t under conscious control.)
So, to most people, square B looks almost white (since it is adjacent to black squares) and square A looks almost black (since it is adjacent to a white square).
There are different types of colorblindess, with different degrees of color vision. In my case, I can see primary colors (red, blue, black, orage, green, yellow, white), but have a hard time distinguishing between shades. Purple, pink, most shades of yello and orange, most shades of green, do not exist for me.
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Kevin
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Judd
I don’t understand how color has anything to do with it. The checks are just shades of grey. (The cylinder is green, but I don’t think that matters—when I convert the picture to greyscale, the effect is the same.)
Daryl, that is just it – I don’t see shades. The checks all look exactly the same.
Wow! That’s interesting. The square labelled “A” and the square labelled “B” look exactly the same to you? For me, square A looks almost black, and square B looks almost white.
I think that’s an unusual condition. Is that true for all color-blind people, I wonder?
For most people, a grey square adjacent to a black square looks white, and a grey square next to a white square looks black. Most people’s eyes adjust for the background light, and only look at relative differences in whiteness. (This adjustment is done automatically—it isn’t under conscious control.)
So, to most people, square B looks almost white (since it is adjacent to black squares) and square A looks almost black (since it is adjacent to a white square).
Daryl
There are different types of colorblindess, with different degrees of color vision. In my case, I can see primary colors (red, blue, black, orage, green, yellow, white), but have a hard time distinguishing between shades. Purple, pink, most shades of yello and orange, most shades of green, do not exist for me.