Design & UX
Article
By Jennifer Farley

How To Resize An Image In Photoshop And Keep It Sharp

By Jennifer Farley

This article was written in 2009 and remains one of our most popular posts. If you’re keen to learn more about Photoshop, you may find this more recent article on getting started with Photoshop of great interest.

Some time ago on the SitePoint forums, Stevieg_83 asked about a problem he was having with resizing screen shots. His question was:

I normally use Fireshot add-on for Firefox which renders a good quality image. However, when I then try to resize in Photoshop, the quality goes right down hill. Anyone have any tips?

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I thought it might be useful to write something about this, because a lot of people find they get fuzzy or blurry images when they try to resize them, regardless of whether the image came from a camera, a scan or a screenshot.

1. I’ll start by taking a screenshot using Fireshot. You can see a section of the overall screenshot, viewed at 100% magnification below. There’s an image on the right hand side and some text on the left.

(Note: I’m using Photoshop CS4 here, but this technique is the same from version CS onwards).

Screengrab

2. Copy and paste the screenshot into a new Photoshop document or open the screenshot in Photoshop if you’ve already saved it.

3. Choose Image > Image Size. When you want to REDUCE the image size, click on Resample Image check box to make sure it is selected and choose Bicubic Sharper from the drop down menu.

Image Size Dialog

In the Width field enter the number of pixels you want the new size to be. I’m resizing this image from 543 pixels down to 300 pixels wide. Click OK and your image is resized.

The result below shows the text has become a little fuzzy (remember it almost half its original size) but the image on the right still looks very sharp.

screengrab-bicubicsharper

Compare this to if I had chosen the Bilinear option in the drop down menu. The text has completely broken apart and the image is looking fairly rough around the edges.

screengrab-bilinear

If I chose the Nearest Neighbor option, you can see the results are even worse.

screengrab-nearestneighbour

So for reducing image sizes, choose the Bicubic Sharper option. It’s very useful for designers or photographers who want to put smaller versions of their work on the web. If you’re doing a lot of image reduction, you can set up Photoshop preferences so that Bicubic is the default choice. To do this choose Preferences> General and you’ll see Image Interpolation and there you can pick Bicubic Sharper from the drop down menu and click OK.

preferences-dialog

Tips For Resizing

  • Make sure your image is in RGB color mode before you do anything! If it’s not, choose Image > Mode > RGB to convert it. After you’ve converted it, you can change the mode again if necessary.
  • Try to only resize an image once. The more you resize, the more blurry and fuzzy things get. You can get around this by using a Smart Object, but we’ll look at that another day.

So I hope that’s useful for people wondering about how to resize images.

If you enjoyed reading this post, you’ll love Learnable; the place to learn fresh skills and techniques from the masters. Members get instant access to all of SitePoint’s ebooks and interactive online courses, like Foundations of Photoshop.

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