Website snapshot for phishing detection?

Is by just looking at the webpage snapshot, is a possible way 开发者_开发技巧to detect website phishing? Is is accurate enough?

Is we can detect the similarity of the URL, why do we need other sophisticated techniques such as image snapshot, in order to detect phishing from the browser?

If anyone knows anything about this, care to share. Any links/resources/research about it is appreciated.

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Obviously because the URLs of the sites change all the time. Most of these phishers are hosted from an IP address without a domain. New ones pop up every day. How could anyone possibly predict if a site is phishing until they investigate it?