EXPORT TO JPEG IS CHANGING THE IMAGE DIMENSION FROM 420x297mm TO 1750x1237mm

Question

Hello,After exporting my image in PS to JPEG the image dimension is changing.When I exporting the scale is to 100% but the dimensions are onlyindicated in pixel.Today I've updated PS but the problem is still persisting.Has somebody a solution or the same probleme?by the way, exporting to PGN is NOT changing the dimensions but the filesize is 10 times larger.Kind regards,Alacool

Test Screen Name · Accepted Answer

I imagine this is for print use. If so DO NOT use Export; it is for web use and does not respect the resolution (ppi). Use SAVE A COPY or SAVE AS only. Yes, it is a very silly name "Export" for a function which cannot be used for good exports for print.

davescm · Answer

Just in way of further explanation, your image has not changed size as it has no inherent physical size. It only has pixels which have not changed. There is however a number stored alongside the image data which is the resolution (ppi) and that number is used by the print driver to calculate a physical size for printing and by Photoshop when displaying the rulers.

When exporting, that number is stripped as it is not needed when displaying images on a screen. On re-importing to Photoshop, if an image has no ppi data it is given an arbitary number of 72ppi just so the rulers can be displayed. So no actual image data has changed, only the ppi number.

As Test Screen Name explained above, using Save As does store the ppi data in the saved image.

Dave

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