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Irfanview: how to zoom-in without having the image blurred; I need it for GUI development to see large pixels.

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What type of files are they, and does if Infranview can't do it, does it have to be that program? – KCotreau Jun 29 '11 at 13:46
Usually, it are screenshots. Well, IrfanView is my choice of small and fast image viewer since ages. I've tried a couple of alternatives, but they lack at different areas - mostly in usability. – Mike L. Jun 30 '11 at 7:12
The exact file type matters. Some scale (.jpg), some are pixels (.gif) – KCotreau Jun 30 '11 at 7:20
I'm talking about screenshots (taken with [Alt+]Print, then pasted), not about viewing files. – Mike L. Jul 1 '11 at 8:38
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3 Answers

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I found the solution by reading changelog

New display option: Use Resample for zooming (Menu: View->Display options)

So from "View" menu, select "Display options" and turn off "Use resample".

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Is the image a high-resolution but low quality? As in, do you see blur before you see pixels? Irfanview isn't really meant as a pixel manipulation tool. You're probably looking more for a photoshop-esque tool. Try GIMP or similar to see if it isn't better suited for your needs.

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up vote 0 down vote

What you're looking for is technically known as "Nearest Neighbor Interpolation".

i would use an application like

  • Microsoft's ZoomIt
  • Magnifier
  • Photoshop

they all 'preserve hard edges of pixels'.

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Well, IrfanView did in the past, too. Don't know when this ant-feature creeped in. – Mike L. Jun 30 '11 at 7:10
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