[texhax] includegraphics and image scaling
heiko.oberdiek at googlemail.com
Fri Dec 10 00:58:14 CET 2010
On Thu, Dec 09, 2010 at 06:39:03PM -0500, Peter Davis wrote:
> On Thu, Dec 9, 2010 at 6:13 PM, Peter Davis <pfd at pfdstudio.com> wrote:
> >> I've run into this before ... where different tools report different
> >> resolutions for JPEG files. If memory serves, ImageMagick always reported
> >> 72dpi, whereas the IJG JPEG Library reported something else. I think this
> >> is the result of multiple file formats with potentially inconsistent fields.
Maybe. However, the EXIF header of your example also shows 72dpi.
> > Interestingly, Adobe Photoshop CS5 and Adobe InDesign CS5 report the image
> > resolution as 96ppi.
> > I'm using XeTeX (xelatex). Is that using ImageMagick internally to get the
> > resolution?
AFAIK, no, but maybe the same library might be used.
> Thanks, Martin, for the tip about jhead. I was not familiar with that tool.
> That appears to agree with Adobe, Windows, etc:
> C:\Users\peterd\images>jhead -v Chrysanthemum.jpg
> JFIF SOI marker: Units: 1 (dots per inch) X-density=96 Y-density=96
Do you have an example image that can be analyzed?
What's the result of:
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