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Is there a way to find the ImageDimensions of an image file without Import'ing each one? The reason being that I have a directory with millions of JPEGs and it's really slow to Import each one separately.

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The documentation says how to do this.

Import["image.jpg", "ImageSize"] // AbsoluteTiming

{0.052691, {2048, 1366}}

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  • $\begingroup$ Nice, I totally missed that! $\endgroup$
    – M.R.
    Commented Jul 10, 2019 at 20:52

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