Pictures from Internet

About 20 years ago, pictures are regarded as a very important evidence used in court. However, the reality of pictures become an issue nowadays, because of technology development of computer. Especially, some pictures we get on-line, which are related to plitical, sciential, naked subjects and so forth. For example, I believe some people must have heard about certain femal stars` nude pictures which have been found. From regular people`s view, just focus on pictures themselves, I believe that the conclusion is those pictures are real, but some of them which are proved by specialists are edited throgh computer techonology. Therefore, when we get some pictures and those pictures will be used in somewhere, I must judge the pictures are real or not at the beginning.