Image resized when placed

[CdLCreative]

We've got a jpg image that, when opened in Photoshop is 864 x 462 pixels at 72dpi, which is what we'd expect.

Yet when the image is placed on an InDesign page (CS2 v4.03 on XP) InDesign decides it's 832 x 231 pixels at 144dpi.

This isn't happening with every image, just a few. And InDesign has decided that some of the other images were 150dpi or 288dpi, so it's not a simple factor of 2 issue.

We're guessing that there's something in the image header that Photoshop doesn't read but InDesign does. But we are at a loss to work out what it is.

Has anyone got any bright ideas???

 

[jimoblak]

Your JPG files probably do not have any resolution or size data saved in them. It is not typical that JPG files have this data.

When a file has no resolution data, each app opening it may assign a default resolution/size, which could be 72 ppi, 100 ppi, etc.

It would be best to use another image format that better records and interprets this size data.