Image optimization

One of the more potentially advantageous yet wholly underused areas for optimization is in image search engines. Yet while site owners and merchants are more often seeing their images show up in the regular search results, few have come to understand the benefits of image search optimization. And for professional optimizers, it requires a much broader understanding and specialization over what traditional search allows.Statistics from Hitwise show it to achieve 90% growth year after year, with over 360,000,000 searches per month across the top search engines: Google, Yahoo!, Ask, MSN, and AOL. All in the "Big 5" have a search vertical dedicated specifically to image results, with 3 of them (Google, Yahoo!, MSN) integrating images into some contextual search results.

"It's a free way of getting even more keyword signals for Google," said Smith. "It may be seen as a fairly authoritative way for image reference and may be ranking well in Google's image search results."

"People love participating in the enhanced image search; we've had great success with it so far," said Vanessa Fox, Product Manager for Google. Smith, however opined that its continued participation may depend on Google's ability to provide added incentives for users."

The panelists offered the following tips for optimizing images for search engines:

• Image originality. The panelists agree that there is a special advantage to taking original photos, even if you are a retailer who already receives photos elsewhere such as from a manufacturer. "The more control you have over the images on your site the better." says Evans. "You can brand them with your logo, url or trademark. It also allows you as the retailer to present the product in the best possible way that will convert with your own audience, not to mention allowing you to present the features in a different way than other competitors.

• Image quality. Start off with good quality pictures, and make necessary resolution adjustments between your full size images and your thumbnails. Smith mentions that pictures with good contrast tend to work better. "When they're reduced down to the thumbnail size, stronger contrast is needed to better discern image, which will lead to more people clicking and linking to image." he says.

• Image naming. "Make the image names of your files match what is actually represented in the file," says Thurow. "The image name will appear beneath the graphic image in search results. It helps to communicate to searchers that they are viewing the desired graphic image. "Do NOT expect your photo editing program's default settings to give you optimized file names," she continued. "Default names communicate nothing to the search engines on their own. Make sure to set up your own file naming structure in advance."

• Expand audience base. Be broad in your subject matter. Image search is not just for retailers directly reaching customers. "There are all sorts of innovative ways you can get people interested in your company and hence build up traffic and conversions. For example, factories might show steps in product manufactures, hotels might show furniture & decorative art in addition to details on their rooms, and restaurants might show picturesque views or special event rooms."

• Optimize the page with the image. Optimize the page the image appears on can be just as important as optimizing the image itself. "Optimizing the actual page for contextual search improves graphic images search," Thurow added. "Search engines also look at text surrounding a graphic image to determine relevancy." says Thurow. "Text within the anchor tag and next to anchor text is especially going to influence image-search rankings," said Thurow. "If you can reasonably put labels and captions on key graphic images, try and do so."

• File organization. Both Evans and Thurow mentioned of crucial importance is creating an image folder on your web server space that's accessible to the search engines. "Do not robots exclude your graphic images directory or limit search engine access to graphic-image files." says Thurow. Another big mistake people make is putting their 'click to see larger image' inside of a JavaScript link. When you do that, you are limiting search engines' access to that image file."

• Freshness. Smith recommends that if you're targeting high popularity keywords, try experimenting with re-uploading your pix, since image freshness is a contextual clue for the search engines and might affect relevancy.

Future of image search

Image search optimizers on the panel expressed their desire to see more opportunities for image search optimizers, such as a keyword research tool specific to image search (like the Overture keyword tool) and the ability to submit image/multimedia specific feeds. "That would allow webmasters to have better control over defining what the image was in relation to content," says Evans.

(refer from searchenginewatch.com)