Object determining system and robot cleaner applying the object determining system

An object determining system, comprising:

• a processing circuit;
• a first stage object sensor, configured to generate a first stage object sensing result of an object;
• and
• a second stage object sensor, configured to generate a second stage object sensing result of the object if the processing circuit determines the object exists in a predetermined range of the object determining system based on the first stage object sensing result, wherein the processing circuit further determines an object kind of the object based on the second stage object sensing result;
• a line light source, configured to generate line light;
• and
• an area light source, configured to generate plane light, wherein the first stage object sensor generates the first stage object sensing result based on the line light, wherein the second stage object sensor generates the second object detecting result based on the plane light;
• wherein the first stage object sensor is a depth sensor or a thermal sensor;
• wherein the second stage object sensor is an image sensor or a thermal sensor.