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Digital Lifestyle
Images, Graphic Design, and Digital Photography
How do I take screen shots at my displays native pixel density? ...NOT 72 PPI!
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<blockquote data-quote="davidlones365" data-source="post: 1262706" data-attributes="member: 205512"><p>Again, NO...</p><p></p><p><a href="http://cl.ly/0T3h0N0P3n3a1A373w1w" target="_blank">72ppi</a> ... <a href="http://cl.ly/3v1O2b1G343z0B0p2B2K" target="_blank">300ppi</a> ... <a href="http://cl.ly/0E3o2T3j1M3y2s2d2J34" target="_blank">1000ppi</a> (...image links.)</p><p>You should find that all three images have the same file size: 1.47 mb (or 1,544,958 bytes), and the same number of pixels: 1202 x 1354, but different pixel density values. Because of this, they each have different image sizes when viewed on screen or in print at "actual size". (…not actual <em>pixels</em>. Preview and many other image viewers seem to mistakenly do that by default. To make Preview show images at their real "actual size" (assuming the author of said image used an accurate pixel density value, not "72ppi"), in preferences, for both "Images" and "PDF", change "Define 100% scale as:" to "Size on screen equals size on printout".)</p><p></p><p>At the very least, one might expect 72ppi to have a larger file size since it has the largest apparent actual size. I'm aware thats probably the opposite of what most people assume (greater ppi, larger file size), but that goes to show you just how misinformed people are about this topic. Either assumption is wrong, pixel density has absolutely NO EFFECT of an images file size.</p><p></p><p>(...and, it should be worth pointing out that 1000ppi is closer to the stamp's original size than 72ppi.)</p></blockquote><p></p>
[QUOTE="davidlones365, post: 1262706, member: 205512"] Again, NO... [URL="http://cl.ly/0T3h0N0P3n3a1A373w1w"]72ppi[/URL] ... [URL="http://cl.ly/3v1O2b1G343z0B0p2B2K"]300ppi[/URL] ... [URL="http://cl.ly/0E3o2T3j1M3y2s2d2J34"]1000ppi[/URL] (...image links.) You should find that all three images have the same file size: 1.47 mb (or 1,544,958 bytes), and the same number of pixels: 1202 x 1354, but different pixel density values. Because of this, they each have different image sizes when viewed on screen or in print at "actual size". (…not actual [I]pixels[/I]. Preview and many other image viewers seem to mistakenly do that by default. To make Preview show images at their real "actual size" (assuming the author of said image used an accurate pixel density value, not "72ppi"), in preferences, for both "Images" and "PDF", change "Define 100% scale as:" to "Size on screen equals size on printout".) At the very least, one might expect 72ppi to have a larger file size since it has the largest apparent actual size. I'm aware thats probably the opposite of what most people assume (greater ppi, larger file size), but that goes to show you just how misinformed people are about this topic. Either assumption is wrong, pixel density has absolutely NO EFFECT of an images file size. (...and, it should be worth pointing out that 1000ppi is closer to the stamp's original size than 72ppi.) [/QUOTE]
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How do I take screen shots at my displays native pixel density? ...NOT 72 PPI!
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