Why is my passport face photo useless with a smile?

ByLucas

Posting questions about traveling overseas, websites returning answers by traveling veterans around the world "Travel Stack Exchange", And the question that many viewers are interested in is"Why is it that passport face photo is not a smile?"something like. When going abroad, the official compares the photo of the passport with the owner's face at the immigration review, but it should not change much regardless of whether it is a serious face or a smile. In fact, why not?

Legal - Why are you now required NOT to smile in passport photos? - Travel Stack Exchange
http://travel.stackexchange.com/questions/11534/why-are-you-now-required-not-to-smile-in-passport-photos


On the other hand, various answers such as "You can not make the same smile in the atmosphere of customs" were received, but ultimately,International Civil Aviation Organization (ICAO)It became clear that the document of it was based. "Passport photograph provision" within this is an international standard for biometrics authenticationBioAPIof"ISO / IEC 19794"It has been enacted from the unique format definition of individual biometric features such as fingerprint, face, iris, vein, etc. It is impossible for computer to read in smiley or other unregulated photographs.

ByKc7fys

For example, Travel Stack Exchange is Yahoo! Some people like it, such as chief chestnuts or major small towns, have respondents, some of them feel stunning or humorous. For example, "Why does my passport have an expiration date?"Because the International Civil Aviation Organization (ICAO) does not recommend expiration date of more than 10 years" "When you age you get different from the face of the photo, you can not recognize by biometrics, crime It will be easier to use it ", although quite a bad answer has been received,"Can travelers who went to America buy guns?To the question "Simply think, it is impossible" "If you really need it you should buy an illegal gun," Bassari.

ByStéfan

Travel Stack Exchange answers firmly for questions that are open to discussion, so if you have something you do not understand about traveling, you may be able to pick up your chest.