An excellent way to drive traffic to your site using images is by optimizing the images present in your site. This can improve your site page speed as well as bring traffic through image search in various search engines. Good quality optimized often linked by other webmasters which can increase visits to your site.
Tips for Image Optimization
Quality: Use Crisp, sharp and good quality images rather than blurry, unclear images.
Landing Page: Create landing page for each image even though these image appears on other pages in your site. You can also provide comments, discussions or ratings for each image.
Position: Place the images high on the page as most of the users never scroll to the bottom of a page.
Folders: Save similar images in seperate folders. You can also create seperate directories for the images based on its category.
Dimensions: Specifiy the dimensions, width and height of the image which can load your page more quicker and improve the user experience.
Text: Search engines will not be able to read text from images. Do not embed text in images.
Image Name: Name your image with the subject matter to which it is related. Descriptive image name can also be useful to users. If the search engines could not find text in the page on which they found the image, they will use the image name as image snippet in their search.
For example: img01.JPG can be saved and uploaded as search-engine-images.jpg.
Alt Text: Alt attributes is very useful to describe the contents about the image. These alt attribute information is used by the search engines to provide best images for a query. Descriptive alt attributes provides informations to users with visual impairments, people who use screen readers and people who have low banwidth connections as they will not be able to see images on the web page. Do not try to stuff all your keywords in alt text which may be considered as spam by search engines and will create a negative impact.
Instead of <img alt="" src="http://www.blogger.com/search-engine-image.jpg" /> use
<img alt="Image optimization" src="http://www.blogger.com/search-engine-image.jpg" />
Title Text/Caption: Provide descriptive Title and Captions for your images and also make sure your images are placed near the relevant text.