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In reply to the discussion: This is why we are not about to be replaced by robots [View all]Kelvin Mace
(17,469 posts)Google simply searches links for images that are tagged in relation to dogs. The more common the subject, the more tags to the image, the more accurate the result.
For example, type in "Miguelito Loveless", the villain from the 60s show The Wild, Wild, West, You will get a lot of photos of Michael Dunn, the actor who played him in character. However, as you look through the results you will find photos that are not Michael Dunn, or the character Miguelito Loveless, such as these:



http://3.bp.blogspot.com/_RaOrchOImw8/TAw6hije6fI/AAAAAAAAj7I/1DXkvMy497E/s1600/Linda+Hunt.jpg
http://ia.media-imdb.com/images/M/MV5BMjAyNjI0NTkyNF5BMl5BanBnXkFtZTgwMDcwNzU1MTE@._V1_UY1200_CR485,0,630,1200_AL_.jpg
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http://www.famousfix.com/post/stephen-hawking-wants-to-play-a-james-bond-movie-villain-39292915
I think we can agree that Ted Cassidy, Ida Lupino, Julie Newmar, Roy Thinnes and Peter Sellers are NOT either Michael Dunn or Miguelito Loveless.
The reason they get returned is that they happen to be on a page that also refers to the search term.
If Google actually could "recognize" images, it would know that Julie Newmar is NOT Miguelito Loveless.
You can use image search to try and identify an object and Google will search for images similar to the one you provide and show you what the image has been tagged as. Again, the more common the image, the more accurate the result. However, when I load personal photos, especially of ones that have never been on line, accuracy drops. I have a number of photos of Leonard Nimoy and George Takei (taken at various cons in the 70s), people easily identified by humans, but Google image search can't nail them down because my photos are candid shots that have never been online before.