Image processing in front Live Camera to detect t when the light of a room is open or closed

Question

So i am student in my final year , and i need in my project graduation to detect via a live camera if the light in a room is open/closed in Xamarin Forms
Do u have any suggestions guys how can i implement that ? and what to use to do that

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

You do not need to use camera to detect the light, lots of android devices have a light sensor.

For Android, you should SensorManager to get the light value.

   SensorManager _senMan = (SensorManager)GetSystemService(Context.SensorService);  
               Sensor sen = _senMan.GetDefaultSensor(SensorType.Light);  
               _senMan.RegisterListener(new MySensorListner(_senMan,this), sen, Android.Hardware.SensorDelay.Game);  
     
    internal class MySensorListner : Java.Lang.Object, ISensorEventListener  
       {  
           SensorManager _senMan;  
           MainActivity mainActivity;  
           public MySensorListner(SensorManager _senMan, MainActivity mainActivity)  
           {  
               this._senMan = _senMan;  
               this.mainActivity = mainActivity;  
           }  
           public void OnAccuracyChanged(Sensor sensor, [GeneratedEnum] SensorStatus accuracy)  
           {  
               
           }  
     
           public void OnSensorChanged(SensorEvent s)  
           {  
               // get lightSensor value.  
     
               s.Sensor = _senMan.GetDefaultSensor(SensorType.Light);  
               float lightSensorValue = s.Values[0];  
                Toast.MakeText(mainActivity, lightSensorValue.ToString("0.00"), ToastLength.Long).Show();  
           }  
       }  
   }  

Based on the lightSensorValue, you should detect if light is ON or OFF.

Best Regards,

Leon Lu

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Answer 2

Hi there! Congratulations on your final year of study! For detecting if a room light is open or closed via a live camera in Xamarin Forms, you can use the camera functionality provided by Xamarin.Forms.MediaElement. You can capture a live video feed from the camera and process the frames to determine the state of the room light. You can use C# to implement the logic for processing the video frames and detecting the open/closed state of the room light. Some possible approaches could be to analyze the pixel values in the video frames to determine the brightness level or to use computer vision techniques such as edge detection or color thresholding to identify the state of the room light. It may require some experimentation and testing to find the most accurate approach for your specific project. Good luck with your graduation project!