How do I get a picture of curl to post to an address in a binary way

How to get a picture of curl to post to an address in a binary way
RT, such as $data for Curl_exec () to get to the picture, at this time I want to put the picture in binary mode post to an address, what should I do?
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The source and format of the data is not required when the post transmits data, because that is the subject matter of the receiving party
Of course, you need to do some processing of the data according to each other's requirements.

So, what kind of data does that address ask you to send?
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Reference: http://blog.csdn.net/fdipzone/article/details/40098169

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