The default application that the reference image starts is the Camera MUX 2x2 example application.
You can change configuration to start a different example or even custom one that you build. You can use the existing SLM and sensor configuration files one you have uploaded your application to the the R-Car V3M Starter board.
# cp slm-config-platform-default.xml
slm-config-platform.xml
...
...
<SLM:component name="camera_mux2x2">
<SLM:command>/base/usr/bin/camera_mux2x2</SLM:command>
<SLM:args>-n4</SLM:args>
<SLM:depend>sensor</SLM:depend>
<SLM:stop stop="signal">SIGTERM</SLM:stop>
</SLM:component>...
...
...
...
<SLM:component name="camera_mux2x2">
<SLM:command>/base/usr/bin/mycustomcamera</SLM:command>
<SLM:depend>sensor</SLM:depend>
<SLM:stop stop="signal">SIGTERM</SLM:stop>
</SLM:component>...
...