Send one or more images through JSON Web Service

I'm developing an Android 3.1 application using Spring Framework for Android 1.0.0 RC1.

I have developed a JSON WCF web service with C# and .Net Framework. I know how to send objects, strings, integers, etc. but I don't know how to POST an image from Android to web service.

How can I post an image?

The Spring for Android Samples project includes an example of POSTing an image using RestTemplate.

https://github.com/SpringSource/spri...aActivity.java