in our visual world, tweaking the images on your site for seo takes a little extra time but can result in a good branding payoff
Google Image Search
Most search queries in Google image search aren’t very competitive. Well ranked images are seldom the result of great SEO and often sheer luck. The basics of image search are however easy.
Using your keyword in the URL/image name, including it in the alt-/title attribute and placing it within keyword rich textual content is often enough for high ranking. Defining ornamental images as CSS backgrounds makes all the remaining img-tags stand out more. Images on well optimized pages with a lot of link value have the highest chance of scoring.
Only the first 4 to 7 images will appear in regular search results and only when your queries show images, so make sure you outrank everything else.
Branding the Image
Generic images for generic keywords don’t show that one of the images belongs to you. Adding some big logo to the image would really make it stand out more and the branding value of your logo high within the search results can be enormous.