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Photography Q&A
jpg question - compression / quality settings comparing different size sensors
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<blockquote data-quote="Texas" data-source="post: 591030" data-attributes="member: 42267"><p>Yes I understand how jpeg settings work and what they do and how, as well as Nikon's 'optimize file size' setting, file size vs. subject detail and and have seen Ken R's comparisons of IQ settings using different jpeg settings, but those are all on the same camera. </p><p></p><p>Simplifying further:</p><p></p><p>I'm asking about the relative IQ of jpegs from 2 different cameras, one with a bigger sensor set for higher compression than the one from a smaller sensor set for Large/Fine. Size and compression being set to give pretty close to the same file sizes from both cameras.</p><p></p><p>How do the two similar file size, but different compression jpegs compare ? </p><p></p><p>The two being a more highly compressed jpg from a 12, 16, 24, or greater mb sensor vs. the 'fine' (most lightly) compressed jpeg from a 6mb sensor - choosing Q factors on the large sensor camera (size and res) and lightest compression (meaning fine) on the 6mb such that the final jpeg file sizes are comparable.</p><p></p><p>Theory is fine, and may be all that's out there relegating this to a thought experiment.</p><p></p><p>But with all the interesting things folks have reported on in this forum I figured someone has already done this experiment.</p><p></p><p>I'd like to think about two different cameras that differ only in sensor size but that is not likely possible.</p><p></p><p>No doubt there are other factors involved between two different cameras that could skew this jpeg IQ comparison experiment:</p><p>1/ the actual jpeg generation math engine/demosaic'er</p><p>2/ pixel quality/size vs overall pixel count</p><p>3/ lots of others</p></blockquote><p></p>
[QUOTE="Texas, post: 591030, member: 42267"] Yes I understand how jpeg settings work and what they do and how, as well as Nikon's 'optimize file size' setting, file size vs. subject detail and and have seen Ken R's comparisons of IQ settings using different jpeg settings, but those are all on the same camera. Simplifying further: I'm asking about the relative IQ of jpegs from 2 different cameras, one with a bigger sensor set for higher compression than the one from a smaller sensor set for Large/Fine. Size and compression being set to give pretty close to the same file sizes from both cameras. How do the two similar file size, but different compression jpegs compare ? The two being a more highly compressed jpg from a 12, 16, 24, or greater mb sensor vs. the 'fine' (most lightly) compressed jpeg from a 6mb sensor - choosing Q factors on the large sensor camera (size and res) and lightest compression (meaning fine) on the 6mb such that the final jpeg file sizes are comparable. Theory is fine, and may be all that's out there relegating this to a thought experiment. But with all the interesting things folks have reported on in this forum I figured someone has already done this experiment. I'd like to think about two different cameras that differ only in sensor size but that is not likely possible. No doubt there are other factors involved between two different cameras that could skew this jpeg IQ comparison experiment: 1/ the actual jpeg generation math engine/demosaic'er 2/ pixel quality/size vs overall pixel count 3/ lots of others [/QUOTE]
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jpg question - compression / quality settings comparing different size sensors
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