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<blockquote data-quote="WayneF" data-source="post: 303346" data-attributes="member: 12496">If you use Adobe &quot;Save For Web&quot; to write your JPG file, it removes all Exif data, which is where the dpi number is stored.&nbsp;72 dpi is just the value Adobe shows when there is no dpi number.&nbsp;&nbsp; It is NOT 72 dpi, it is blank.&nbsp; Just Adobes cute way.If does not matter what that dpi number is or isn't, not until the time you press the File - Print menu selection.&nbsp; Then you will fix it first, to specify the size you want to print.&nbsp; In camera images, the ONLY USE for the dpi number is to space the pixels on printed paper, at like 300 pixels per inch&nbsp; (determines size of the print, on inches of paper).&nbsp; On the monitor screen, dpi is 100% ignored in all cases, it could not matter less.The digital image is dimensioned in pixels...&nbsp;&nbsp; You can resample it to be more appropriate size for your use, but when you write the JPG file, the pixel dimensions remain the same, no change.&nbsp;&nbsp; It could not matter less for video monitor purposes what the dpi number is or isn't.&nbsp; This is why Save For Web removes it, it simply does not matter on the monitor screen.&nbsp; What does matter is the dimension in pixels, which is not affected unless you resample or crop it.<a href="http://www.scantips.com/lights/pixels.html" target="_blank">Pixels, Printers, Video - What's With That?</a></blockquote>

[QUOTE="WayneF, post: 303346, member: 12496"] If you use Adobe "Save For Web" to write your JPG file, it removes all Exif data, which is where the dpi number is stored. 72 dpi is just the value Adobe shows when there is no dpi number. It is NOT 72 dpi, it is blank. Just Adobes cute way. If does not matter what that dpi number is or isn't, not until the time you press the File - Print menu selection. Then you will fix it first, to specify the size you want to print. In camera images, the ONLY USE for the dpi number is to space the pixels on printed paper, at like 300 pixels per inch (determines size of the print, on inches of paper). On the monitor screen, dpi is 100% ignored in all cases, it could not matter less. [B]The digital image is dimensioned in pixels[/B]... You can resample it to be more appropriate size for your use, but when you write the JPG file, the pixel dimensions remain the same, no change. It could not matter less for video monitor purposes what the dpi number is or isn't. This is why Save For Web removes it, it simply does not matter on the monitor screen. What does matter is the dimension in pixels, which is not affected unless you resample or crop it. [URL="http://www.scantips.com/lights/pixels.html"]Pixels, Printers, Video - What's With That?[/URL] [/QUOTE]

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