What is most SEO optimized image HTML code for?

Question

so far i was doing it like this:

<a href="http://domain.com" title="Keyword"><img src="image.png" alt="Keyword" /></a>

Now, i discovered that images can have title attribute too:

<a href="http://domain.com" title="Keyword"><img src="image.png" alt="Keyword" title="Keyword"/></a>

Is there any other optimization i could pull off to boost image links value?

Answer 1

I would have to say yes, the title tag would add value to your SEO. Check this link for full details - http://www.seocentral.com/tutorials/alt-title-attributes.html

Answer 2

I think that's the best you can do really, someone told me to try and make image names as descriptive as possible, for instance:

image_001.jpg --> honda_accord_2009.jpg

Granted image.png is just an example, but it might apply.

That's all I could think of.

Answer 3

Think of the alt attribute as an alternative text replacement for the image. Imagine for a moment that you had to describe the image to someone who could not see it. That is the sort of information you should be conveying in the alt attribute.

Similar to the alt attribute, title is used for the same purpose. It helps to convey extra information about an element. You can apply the title attribute to most elements but you must give all your images an alt attribute.

In my opinion, having both an alt and a title on an image is redundant, especially if they are conveying the same information.