Problem with dpi value

Hello,

I have a problem with the dpi-value of one JPEG image. Photoshop says its resolution is 72dpi. When I read the image data with ImageMagick, PaintShopPro or several EXIF-Viewer programs I always get 300dpi as the resolution.

Which dpi value is correct ? From where gets Photoshop the information of 72dpi, when not from the EXIF data ?

I hope someone can explain it to me.

Here is the image I am talking about: download <http://www.box.io/images/dpiproblem.jpg>

What version of Photoshop?

Reading the EXIF info did not happen umtil v7 or CS, I'm not sure which.

I am using Photoshop 7

The pixel dimensions are still the same, just go to image>image size, turn "resample image" off, and change the resolution to 300PPI. The overal pixel dimension will remain intact.

Thank you for your answer.

But I would like to save the image in some way with Photoshop, so the other applications (like ImageMagick) also recognize the image as a 72dpi image and not as a 300dpi image.

Actually its ppi and not dpi.pixels per inch is the correct term and dpi only comes into play at the printer level,which is dots per inch. its all the same.an 11x14 at 300ppi is exactly the same resized as a 45x58 at 72ppi. go to image size and uncheck resample image to see for yourself.

On Sun, 17 Dec 2006 10:09:10 -0800,
wrote:

I have a problem with the dpi-value of one JPEG image.

This may help you:

http://www.ransen.com/Articles/DPI/Default.htm

Easy to use graphics effects:
http://www.ransen.com/