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Apple Computing Products:
macOS - Apps and Programs
Big Sur upgrade and pics with Preview
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<blockquote data-quote="MacInWin" data-source="post: 1870485" data-attributes="member: 396914"><p>Well, here is my own experiment. First I exported an image from Photos using three formats: TIFF, JPG and PNG. The largest was the TIFF, so I opened that in Preview, then Exported it as a JPG with the default quality setting, renaming it to the original name plus "from TIFF." Then I Exported again as a JPG with the quality slider to the left almost all the way and added "lo qual" to the name. Here is the result: [ATTACH=full]33041[/ATTACH]</p><p></p><p>As you can see, the original file sizes were all different as exported from Photos. And when I exported the TIFF image from Preview to jpg, I got a file size almost the same as what Photos got when it exported, about 2.8 MB. The low quality then dropped to 656 KB. </p><p></p><p>So, it's working. It's something going on in your system, or you aren't doing it properly.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1870485, member: 396914"] Well, here is my own experiment. First I exported an image from Photos using three formats: TIFF, JPG and PNG. The largest was the TIFF, so I opened that in Preview, then Exported it as a JPG with the default quality setting, renaming it to the original name plus "from TIFF." Then I Exported again as a JPG with the quality slider to the left almost all the way and added "lo qual" to the name. Here is the result: [ATTACH type="full"]33041[/ATTACH] As you can see, the original file sizes were all different as exported from Photos. And when I exported the TIFF image from Preview to jpg, I got a file size almost the same as what Photos got when it exported, about 2.8 MB. The low quality then dropped to 656 KB. So, it's working. It's something going on in your system, or you aren't doing it properly. [/QUOTE]
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Apple Computing Products:
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Big Sur upgrade and pics with Preview
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