Solved

WHat does that 'pixels per inch' mean exactly?

Posted on 2006-07-03
3
434 Views
Last Modified: 2010-04-07
I'm using PhotoShop CS to edit some pictures in order to create wallpapers at 1024x768 pixels.
I used to have the notion that more pixels per inch mean a better resolution of a particular image. However I observe there are bmp and jpg files that have different pixels per inch, some have 72, other have 200 or 300. By using PhotoShop and loading and saving the same files while increasing the number of pixels per inch, I don't see any difference in picture quality.
I even saw pictures at the same size (1024x768) at 72 dots per inch having better quality than some others that have 300 dots per inch.
Please any graphics expert explain this 'pixels per inch' definition before I'm getting lost?
0
Comment
Question by:Volga
  • 2
3 Comments
 
LVL 95

Expert Comment

by:Lee W, MVP
ID: 17035371
The quality of the image won't change - the SIZE of the image will.
http://en.wikipedia.org/wiki/Pixels_per_inch
0
 

Author Comment

by:Volga
ID: 17035563
Thx for the link. However it still doesnt' explain that I have 2 identical images of the same size (1024 pixels x 768 pixels), one with 72 pixels/inch, the other with 300 pixels/inch. In terms of quality they are exactly the same on the screen.
0
 
LVL 95

Accepted Solution

by:
Lee W, MVP earned 100 total points
ID: 17037598
Yes, they are the same - as I said - the size of the image will differ.  Sorry if I wasn't clear - the SCREEN size will be the same (the screen has a set number of pixels and doesn't care what the "per inch" rate is - but try to print them.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction When sharing photos, especially via e-mail, the large resolution images that most cameras take today make for extremely large file sizes. The time required to upload these files to forums, send in e-mails, post to blogs or even placi…
In this article, I'll explain how to change the color of a selection in Photoshop. I'm sure there are a couple different ways to do this in photoshop, but this is my preferred method in Photoshop. I am using Photoshop CS6 and I will be adjusting the…
In this tutorial viewers will learn how to create a vector texture to apply a non-rasterized texture to vector images, using Photoshop and Illustrator Open a textured image such as a scanned-in piece of cardboard in Photoshop: Convert the texture to…
In this tutorial viewers will learn how to create layer styles in Photoshop to easily apply effects to multiple items. Open a document in Photoshop: Apply layer styles to a layer by right clicking the layer in the Layers window and selecting "Blendi…

932 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now