A simple definition for capturing an image with the photoCam would be as follows:

<p:photoCam widgetVar="pc" listener="#{photoCamBean.onCapture}"
  update="capturedImage"/>

<p:graphicImage id="capturedImage" 
  value="#{photoCamBean.capturedImage}" cache="false"/>

<p:commandButton type="button" value="Capture"
  onclick="PF('pc').capture()"/>

The captured image is triggered via the client-side JavaScript method, capture. The button declared in the preceding sample invokes the capture method via the widget variable defined for the photoCam component. A method expression, which will be invoked when an image is captured, is bound to the attribute. This method will handle the image captured on the server side. A sample definition for the method is as follows:

StreamedContent capturedImage;

public void onCapture...