most of the images i use are descriptive and not really related the post itself. like when you write a top 10 article and you have 10 paragraphs that have one image each, so you end up with images that describes only one part of the article and not all of it. how would you optimize such an article, would you put your keyword in all of the images. or just put a description of the image itself and not bother with the keyword you're targeting with your article.Depends what you are using it for.