汪星人看得懂电视上的图像

 

A 2013 study published in the journal Animal Cognition showed that dogs could identify images of other dogs among pictures of humans and other animals, using their visual sense alone.

 

However, there are some differences between ourselves and man's best friend -- for one, dogs' eyes register images more quickly than do ours. So older television sets, which show fewer frames per second than modern televisions, would appear to a dog to be flickering¹ like a "1920s movie," said Nicholas Dodman, a veterinary behaviorist at Tufts University, in Massachusetts.

 

Dogs also have dichromatic vision, which means they see a range of two primary colors, yellow and blue. Human vision is trichromatic, so we see the full range of colors, according to Binghamton University's Ask a Scientist web page.

 

DogTV, an HDTV cable channel designed for dogs, interests canines² because HDTV has a much higher number of frames per second and is specially³ colored to accommodate dogs' dichromatic vision, said Dodman, who is the channel's chief scientist.

 

DogTV has modes for relaxation⁴, which shows images like dogs chilling out in a grassy⁵ field; stimulation⁶, which depicts⁷ scenes like dogs surfing in southern California; and exposure which shows things like a dog reacting to a ringing doorbell and obeying commands to acclimate⁸ them to such situations at home.

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