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home > speed > tweak > graphic-optimization

Inline Images with Data URLs

Learn how to embed images into your web pages with data URLs. The data: URI scheme includes images directly into your XHTML pages using code instead of external files, saving valuable HTTP requests. more »

By website optimization on 28 Feb 2008 AM | | Comments (0)

The Cost of Banner Advertising on Web Performance

The cost of banner ads for the average website is about one-sixth more objects and one-third more latency. Learn how online advertising affects web page response times, user behavior, and satisfaction. more »

By website optimization on 31 Jan 2008 PM | | Comments (0)

Optimize Parallel Downloads to Minimize Object Overhead

With the average web page growing past 50 external objects, object overhead now dominates most web page delays. Increasing parallel downloads by using multiple hostnames can realize up to a 40% improvement in web page latency. more »

By website optimization on 26 Dec 2007 AM | | Comments (3)

CSS Sprites: How Yahoo.com and AOL.com Improve Web Performance

Learn how AOL and Yahoo! use CSS sprites to improve performance for their busy home pages. CSS sprites save HTTP requests by using CSS positioning to selectively display composite background images. To maximize accessibility and usability, CSS sprites are best used for icons or decorative effects. more »

By website optimization on 26 Sep 2007 AM | | Comments (6)

Mono-Image CSS Rollovers

Learn how to create menu rollovers with different graphic backgrounds with one image. Save HTTP requests by combining on and off images into one mini-sprite and position with CSS. more »

By website optimization on 31 Aug 2007 PM | | Comments (3)

Minimize Noise to Maximize Graphic and Video Compression

Noise is the enemy of efficient multimedia optimization. Learn how to minimize the noise in your images and videos to maximize compression. more »

By website optimization on 30 Jul 2007 AM | | Comments (0)

Update: Pro Ball Head Review

A solid ball head dampens sharpness-robbing vibration for sharper and smaller images and videos for the Web. Updated with the newest models, we compare some pro-level ball heads and offer some tips for sharper photographs. more »

By website optimization on 23 Apr 2007 AM | | Comments (4)

Replace GIF with PNG Images

PNGs are designed to be a more efficient, flexible, and patent-free replacement for GIFs. By replacing your GIFs with PNGs you can speed up your web pages and save bandwidth. more »

By website optimization on 31 Mar 2007 AM | | Comments (10)

Automated Color Harmony Tools

Make your designs sing in four-part color harmony with these automated color harmonization tools. We review a joint effort by Microsoft and Tel Aviv University to automatically enhance the color harmony of an image. more »

By website optimization on 16 Jan 2007 AM | | Comments (10)

Don't Let the Graphics Grinch Steal Your Christmas Bonus

Know what jolly old site owners get when they let their graphics get so plump they shake like a bowl full of jelly? A lump of coal for Christmas. Let our Rudolph guide your way to a merry Christmas and happy New Year with an inspirational rendering of 'Twas the night before Christmas. more »

By website optimization on 11 Dec 2006 PM | | Comments (0)

Combine Images to Save HTTP Requests

Learn how to reduce the number of HTTP requests required by your web pages by combining adjacent images and optionally imagemapping the links. This tutorial shows both client and server side techniques you can use to save precious HTTP requests and speed up your site. more »

By website optimization on 31 May 2006 PM | | Comments (3)

CSS Overlays: Using CSS Positioning to Overlay Web Objects

Learn how to create an eye-catching overlay with CSS positioning. This CSS-layout technique is faster than image slicing requiring fewer HTTP requests. more »

By website optimization on 30 Apr 2006 PM | | Comments (6)

Crop Images Contextually

Crop images contextually for faster downloads and higher impact. By cropping maximally and resizing you can convey meaning without slowing down your web pages. more »

By website optimization on 17 Dec 2004 AM | | Comments (3)

Size Images with Width and Height Attributes

Using width and height attributes on images ensures fast webpage display. Conserve bandwidth by using actual size for thumbnail images. more »

By website optimization on 7 Sep 2004 AM | | Comments (2)

Convert Graphic Text to Styled Text

Converting graphic text to CSS text speeds up your site, makes it more accessible, and search engine friendly. more »

By website optimization on 24 Aug 2004 PM | | Comments (5)

Use an Optimization Tool

Web page analysis and optimization tools can help locate and minimize performance bottlenecks. They can improve accessibility, spelling, XHTML markup, and even search engine visibility. We survey the webpage optimization tool landscape. more »

By website optimization on 22 Jun 2004 PM | | Comments (0)

Graphics: Blur Backgrounds for Optimized JPEGs

Background blurring reduces non-critical details to make the JPEG algorithm work more efficiently. Converting to Lab Color mode allows you to maximize blur for minimum file size. more »

By website optimization on 1 Jun 2004 PM | | Comments (1)

Graphics: Minimize Dithering

Dithering uses existing colors to strategically change pixels to minimize apparent banding. While dithering increases file size, when used in combination with lossy compression and weighted optimization, dithering can allow lower bit-depths for GIFs and PNGs. more »

By website optimization on 24 May 2004 PM | | Comments (2)

Graphics: Influence Histograms

Histogram influencing minimizes banding in GIFs and PNGs by weighting color palettes towards problem areas. Lower banding at lower bit-depths makes for smaller images. more »

By website optimization on 17 May 2004 PM | | Comments (2)

Graphics: Minimize Bit-Depth

Minimize the number of colors in GIFs and PNGs to optimize file size. Lower bit-depths mean smaller palettes and code widths, which makes for smaller images. more »

By website optimization on 10 May 2004 PM | | Comments (0)

CSS: Substitute CSS2 Menus

Substituting CSS2-styled lists for graphic menus and JavaScript can streamline your pages and make them more accessible. more »

By website optimization on 3 May 2004 PM | | Comments (0)

Graphics: Use Lossy Compression for Smaller GIFs and PNGs

Lossy compression lets you squeeze more bytes out of your GIFs and PNGs. Lossy compression increases identical pixel patterns to improve compression in indexed-color images. more »

By website optimization on 26 Apr 2004 PM | | Comments (0)

Graphics: Use Weighted Optimization

Weighted optimization or regional compression applies different degrees of compression to different areas of your image. By varying the quality within images you can improve file size. more »

By website optimization on 28 Mar 2004 AM | | Comments (0)

Graphics: Choose the Right Image Format

Choosing the right image format is the first step in optimizing web graphics. Learn how to choose between the GIF, PNG, and JPEG formats for different image types. more »

By website optimization on 19 Mar 2004 AM | | Comments (0)

Multimedia: Use a Stable Tripod

A stable tripod creates sharper pictures and videos by damping out vibration. Sharper shots mean smaller multimedia destined for the Web. more »

By website optimization on 5 Mar 2004 PM | | Comments (1)

Multimedia: Use Image Stabilization

Image stabilization creates sharper pictures by damping vibration to avoid motion blur. Gyroscopic stabilizers steady cameras for sharper photographs and videos. more »

By website optimization on 24 Feb 2004 AM | | Comments (10)