Face mask detection using viola jones

clc        %clears command line window
clear all; %clears variables
close all; %closes all figures

handles.fig=figure;

handles.pb1=uicontrol('style','pushbutton','position',[150 10 80 40],'callback',@start_cb,'string','Start');
handles.pb2=uicontrol('style','pushbutton','position',[250 10 80 40],'callback',@stop_cb,'string','Stop');
handles.pb3=uicontrol('style','pushbutton','position',[350 10 80 40],'callback',@pause_cb,'string','pause');

handles.run=1;
guidata(handles.fig,handles)

function speak(string)
    title(string);
    NET.addAssembly('System.Speech');
    obj = System.Speech.Synthesis.SpeechSynthesizer;
    obj.Volume = 100;
 %   Speak(obj, string);
end

function start_cb(hObj,~)
cam=webcam('Integrated Webcam');
while true
    if ~isvalid(hObj); break; end
    handles=guidata(hObj);
    if handles.run==1
    disp('running')
    e=cam.snapshot;
    FDetect=vision.CascadeObjectDetector('Mouth','MergeThreshold',100);
    I=e;
    BB_Mouth=step(FDetect,I);
    imshow(I);
    hold on;
    %%
    FDetect=vision.CascadeObjectDetector('Nose','MergeThreshold',16);
    I=e;
    BB_Nose=step(FDetect,I);
    imshow(I);
    hold on;
    %%
    FDetect=vision.CascadeObjectDetector('EyePairBig','MergeThreshold',1);
    I=e;
    BB_bEyes=step(FDetect,I);
    imshow(I);
    hold on;
    FDetect=vision.CascadeObjectDetector('EyePairSmall','MergeThreshold',1);
    I=e;
    BB_sEyes=step(FDetect,I);
    imshow(I);
    if(sum(sum(BB_bEyes))==0&&sum(sum(BB_sEyes))==0)
    speak('Face not detected');
    elseif(sum(sum(BB_Nose))==0 && sum(sum(BB_Mouth))==0)
    FDetect=vision.CascadeObjectDetector('FrontalFaceLBP','MergeThreshold',10);
    BB_hand=step(FDetect,I);
    if(sum(sum(BB_hand))~=0)
    speak('Remove Hand from face.');
    else
    speak('Thank You for wearing Mask.');
    end
    elseif((sum(sum(BB_Nose))~=0 && sum(sum(BB_Mouth))==0)||(sum(sum(BB_Nose))==0 && sum(sum(BB_Mouth))~=0))
    for i=1:size(BB_Nose,1)
    rectangle('Position',BB_Nose(i,:),'Linewidth',5,'LineStyle','-','EdgeColor','r');
    end
    for i=1:size(BB_Mouth,1)
    rectangle('Position',BB_Mouth(i,:),'Linewidth',5,'LineStyle','-','EdgeColor','r');
    end
    speak( 'Please wear mask properly.');
    else
    for i=1:size(BB_Nose,1)
    rectangle('Position',BB_Nose(i,:),'Linewidth',5,'LineStyle','-','EdgeColor','r');
    end
    for i=1:size(BB_Mouth,1)
    rectangle('Position',BB_Mouth(i,:),'Linewidth',5,'LineStyle','-','EdgeColor','r');
    end
    speak( 'Please wear Mask.')
    end
    pause(1)
    else
        handles.run=1;
        guidata(hObj,handles)
        disp('paused')
        break
    end
end
end

function stop_cb(hObj,~)
handles.run=0;
guidata(hObj,handles)
close all;
clc;
clear all;
end

function pause_cb(hObj,~)
handles.run=0;
guidata(hObj,handles)
title('Paused');
end