Google Image search added useful filter options like Line Drawing, Clip Art, Photos, Faces, etc to Image Search results that allow you to narrow down the search results based on the type of the image you are looking for.
To filter the search results on either Line Drawings, Clip Art, Photos or Faces choose the criteria from the style drop down in the search results page.
Here are the examples of search results with various filters when search for Dr.A P J Abdul Kalam
Image Search Results With Line Drawing Filter
Image Search Results With Cartoon Filter