How can I change the DPI in an exsiting photo?

H

Help please

I have a photo that I am working with. It is currently 72 dpi. Can I
increase that to 300 in any way?
 
E

Ed Bennett

Help please said:
I have a photo that I am working with. It is currently 72 dpi. Can I
increase that to 300 in any way?

a) Resize it to a smaller size
b) Retake the same photo with a better camera, or re-scan it at a higher
resolution.
c) Replace the photo with a better-quality one
d) Locate a magic wand.

If you search the archives of this group by using http://groups.google.com,
you should find a post from me a few weeks ago explaining why this is
impossible.
 
J

JoAnn Paules - MVP Publisher

First - If you are talking about print quality, then you mean PPI.

Second - Not with Publisher - and you can with an image editing software
program but I think the quality will not be what you'd like. You can't make a
picture clearer just by bumping up the numbers. It doesn't add anything to
the resolution.

HTH
 
B

Brutus

Open the photo in an imaging editing program and get the width and height in
pixels.

Divide them by 300 to get the width and height in inches. Change the
parameters of the photo to the width and height in inches and the dpi to
300. Save as a .tiff or whatever format you're using. You now have a photo
at 300 dpi at the maximum size it will look good at.

Hope this helps.

b.

I have a photo that I am working with. It is currently 72 dpi. Can I
increase that to 300 in any way?
 
J

JoAnn Paules [MSFT MVP]

You know - I really should visit the group online at lunch while I'm trying
to do 12 other things. Let's try this again:

DPI (dots per inch) is the unit of measure to describe the resolution of a
printer.

PPI (pixels per inch) is the unit of measure to describe the resolution of
an image file.

--

JoAnn Paules
MVP Microsoft [Publisher]



"JoAnn Paules - MVP Publisher"
 
B

Brutus

In the printing trade (in the continent that I am) we still refer to image
files as being in dpi and I must admit that the term ppi is new to me. We do
however refer to a lores image as pixelating on film or on plate.

;-)

b.

You know - I really should visit the group online at lunch while I'm trying
to do 12 other things. Let's try this again:

DPI (dots per inch) is the unit of measure to describe the resolution of a
printer.

PPI (pixels per inch) is the unit of measure to describe the resolution of
an image file.

--

JoAnn Paules
MVP Microsoft [Publisher]



"JoAnn Paules - MVP Publisher"
 

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