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<blockquote data-quote="Rexer John" data-source="post: 139201" data-attributes="member: 12691">But in a photo or on a screen we don't look at shades of grey in seperate boxes, they make up an image in varying shades.Put 2 shades directly next to the other with no gap, a line will show if the shades have enough difference for our eye to perceive.Areas of gradual changes will show banding if the number of levels is lower than our eyes perception.Also our eyes are easily fooled because our brain tells us what we see.e.g. <a href="http://uk.video.search.yahoo.com/video/play;_ylt=A2KLqIm2Z3BR9C0A0kl2BQx.;_ylu=X3oDMTBrc3VyamVwBHNlYwNzcgRzbGsDdmlkBHZ0aWQD?p=crazy+diamonds&amp;vid=3f335873487677df339c9a7371d23403&amp;l=&amp;turl=http%3A%2F%2Fts1.mm.bing.net%2Fth%3Fid%3DV.4602011187347740%26pid%3D15.1&amp;rurl=http%3A%2F%2Fwww.wimp.com%2Fcrazydiamonds%2F&amp;tit=Optical+Illusion%3A+Crazy+diamonds.&amp;c=6&amp;sigr=1124rpv5a&amp;fr=yfp-t-702&amp;tt=b" target="_blank">watch this video</a>.</blockquote>

[QUOTE="Rexer John, post: 139201, member: 12691"] But in a photo or on a screen we don't look at shades of grey in seperate boxes, they make up an image in varying shades. Put 2 shades directly next to the other with no gap, a line will show if the shades have enough difference for our eye to perceive. Areas of gradual changes will show banding if the number of levels is lower than our eyes perception. Also our eyes are easily fooled because our brain tells us what we see. e.g. [URL="http://uk.video.search.yahoo.com/video/play;_ylt=A2KLqIm2Z3BR9C0A0kl2BQx.;_ylu=X3oDMTBrc3VyamVwBHNlYwNzcgRzbGsDdmlkBHZ0aWQD?p=crazy+diamonds&vid=3f335873487677df339c9a7371d23403&l=&turl=http%3A%2F%2Fts1.mm.bing.net%2Fth%3Fid%3DV.4602011187347740%26pid%3D15.1&rurl=http%3A%2F%2Fwww.wimp.com%2Fcrazydiamonds%2F&tit=Optical+Illusion%3A+Crazy+diamonds.&c=6&sigr=1124rpv5a&fr=yfp-t-702&tt=b"]watch this video[/URL]. [/QUOTE]

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