| http://www.w3.org/ns/prov#value | - Preferably, the indicator is visible and/or audible, such as, for example, an indicator lamp 305 (e.g., a light emitting diode (LED)) that lights when an acceptable image has been captured (i.e., ???image acquired???), and a aural indicator via a speaker 310, such as a beep or other tone, that sounds periodically until an acceptable image has been captured (i.e., ???imaging in progress???).
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