There are times where image could actually give you a competitive edge in the Search Engine Ranking. If you look at the print screen on top, you could see that the images of the “370z” actually ranks first compare to other link. There is a need to click twice in order for a visitor to go to your homepage via image search result, but because others may not play much attention in this, you may just slip your website into the top much easier and quicker.

What do you need to do?
So far, I learn that the alt tags and the title tags does play a big role. Meaning that to include your keyword in the image. You could also choose a long-tail keyword to avoid more competition.

Also I have found that the word picture in the page does help you to get your page on the image search result easier.