The default application that the reference image starts is the ADAS 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 H3 Starter board.
# cp slm-config-platform-default.xml slm-config-platform.xml
... <SLM:component name="adas_example"> <SLM:command>/base/usr/bin/adas_example</SLM:command> <SLM:args>-c /base/etc/system/config/adas_sensors.conf -m script</SLM:args> <SLM:depend>sensor</SLM:depend> <SLM:depend>fc-cache</SLM:depend> <SLM:stop stop="signal">SIGTERM</SLM:stop> </SLM:component>... ...
... <SLM:component name="adas_example"> <SLM:command>/base/usr/bin/mycustomcamera</SLM:command> <SLM:depend>sensor</SLM:depend> <SLM:depend>fc-cache</SLM:depend> <SLM:stop stop="signal">SIGTERM</SLM:stop> </SLM:component>... ...