Image Size and Resolution

VSO Seam Carving is a free windows application for resizing and recomposing photos without affecting the proportions of important aspects of the photo.

This whole issue of resolution would be a lot less confusing to newbies if people would use the correct terminology!

Here's a question and answer from a reader's real-world problem of dealing with image resolution. This question is pretty typical of what most people who aren't entrenched in the graphics world have to deal with when they are asked for an image to use in publication.

Whether scanning a document or choosing a digital camera, many people are confused about how many pixels they need in an image.

When posting photos online, you do not need nearly as many pixels as you do for printing. This also goes for images that will only be viewed on-screen such as in a slide show or presentation.

Before using your digital photos online you'll want to reduce them to a smaller size.

Many digital photos will open into your photo editing software with a resolution of 72 ppi. You'll need to change it in order to print at a reasonable size with good quality.

Digital zoom does not capture any additional detail than the maximum optical zoom of your camera. It's best not to use it at all.

Genuine Fractals software lets you increase image resolution with minimal loss in quality.

How to increase image resolution with minimal loss in image quality. Several methods and software options are explained.

Part of the Photoshop Basics course on this site, an explanation of the image size and resolution and how they relate. Useful even for non-Photoshop users.

Part of the Photoshop Basics course on this site, an explanation of the image size dialog box in Photoshop.

What is Resolution?

What is resampling?

How to calculate image dimensions for screen display.

Understanding dpi, ppi, and resolution, including a reference chart for scanning resolution.

You may not see the harm in using HTML tags to change the display size of images in the Web browser, but there are a few reasons why you shouldn't do this.

One of the most confusing aspects of desktop publishing is resolution and the measurement of resolution: SPI, PPI, DPI, and LPI. But it need not be. Here are the short definitions for each term.

Before you panic at the thought of what you don't know about resolution, focus on what you do know and some basic, easy to understand facts.

This article by Bob Atkins explains digital image resizing for screen display and for printing, and how they differ.

"All relationships are complex, but there's nothing more confusing than the complicated relationship between megapixels, file size, image size, and print size. Julieanne Kost and Daniel Brown explain the difference and advise you on the best sizes for scanning, printing (for both a desktop printer and a press), slideshows, and Web sites. "

Explanations and examples of increasing resolution in Painter.

From creativepro.com: "In a dither about dots, halftones, and line screens? Luisa Simone gives you the skinny on how to choose the best scan resolution for your output device."

A detailed explanation of resolution with answers to many common questions about resolution and how it relates to scanning and digital cameras.

Jack Flesher explains his method of increasing image resolution using only Photoshop CS. Scroll to the end of the page for a free action.