i know how to do it on photoshop and gimp but i dont have them. anybody know a website i can change DPI on without having to download software?
Five answers:
B K
2013-02-11 03:20:36 UTC
You can't change the DPI of a photo in Photoshop or GIMP.
It's not possible.
The DPI is the print resolution. It's handled by your printer.
The only thing you can change in image editors like GIMP or Photoshop is the PPI - the screen output resolution.
You can change the PPI in GIMP - click Image > Scale Image > change the resolution settings - or you can use Image > Print Size, and change the resolution there.
Also there is something you need to know - the PPI/DPI of an image is not the quality or resolution of a digital image. Read this before you do anything: The Myth of DPI http://www.rideau-info.com/photos/mythdpi.html
The only thing that matters in digital images is the size of the image in pixels. The true resolution of a digital image is measured in megapixels, not PPI/DPI. Changing only the PPI/DPI of an image makes no difference to the quality or size of an image.
2016-03-09 00:39:48 UTC
What program are you using? If you have Adobe Photoshop you can change it. Go under Image - Then click on Image size. If you don't have Photoshop, a scanning program should have an option to change the photo's size. However, if you're trying to increase a 72 DPI photo to a 300 DPI one, I really don't think theres a way to do that. At least none that I know of! lol Is there a way you can re-import the photo? That might be the only solution I can think of for you. I hope some of this helps.
?
2013-02-10 07:24:45 UTC
Really, DPI of a picture is a useless value unless you are printing. When speaking digitally, a photograph is simply y pixels by z pixels, there are no inches. Now, when printing, you have to choose how many pixels per inch (or dots per inch) you want to print at. Now you can talk about dpi or ppi in regards to the pixel pitch on your monitor digitally, but again, that is more about viewing the picture and less about what that value is.
I don't see a need to ever change it, if you are printing just choose the size you want to print at, that will determine your PPI, If you are wanting to re size for the web, just re size the overall pixels of the photo with any bulk photo editing software, and you will be good to go.
bluespeedbird
2013-02-10 06:45:03 UTC
It's PPI Pixels per inch you'll want to change... DPI Dots per inch is purely printer resolution.
Most online resizers don't allow you to adjust PPI. Best using Gimp if you know how to do it. After all it is free!
BriaR
2013-02-10 08:43:22 UTC
You can download GIMP for free - just google "GIMP download"
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