How to increase the  resolution in a picture

Posted on 2013-09-17
Medium Priority
Last Modified: 2013-11-17
Hi, I am trying to "increase" NOT resize the resolution of a picture.
I was looking for some software on line, but I ended up downloading a bunch of spyware. Does anyone know about some decent free software that allow me to increase the resolution of my pictures please.

thank you very much
Question by:Italiabella
LVL 16

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by:William Fulks
William Fulks earned 668 total points
ID: 39499547
Here is a free app that is supposed to work pretty well:

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by:☠ MASQ ☠
☠ MASQ ☠ earned 668 total points
ID: 39499619
If you are simply wanting to change DPI then I use Irfanview for this.

The Image > Resize option has a specific setting to alter DPI of the loaded image without resizing.  

There's a step-by-step guide here on its use and some other options in terms of software (i.e. XnView and Photoshop)
LVL 58

Accepted Solution

Joe Winograd - EE Fellow & MVE earned 664 total points
ID: 39500134
I agree with MASQUERAID's recommendation of IrfanView. The step-by-step guide he mentioned is good, although the IrfanView screenshot is from an old version. Here's the Resize/Resample dialog from the latest version (4.36):
IrfanView Resize-Resample DPIBe sure to change just the DPI setting (circled in red), i.e., do not change the Width and Height in the [Set new size] or [Set new size as percentage of original] sections.

As a side comment, I suggest that you install the PlugIns for IrfanView. They have some great features, including support for PDF files. You likely won't need the PlugIns for this project, but they may prove very helpful in future use of IrfanView. Install IrfanView first, then the PlugIns. Download links for both are on the left side at the IrfanView home page. Regards, Joe

Author Closing Comment

ID: 39501015
Thank you all, tomorrow I will try and let you know, thank you again.

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