v4 fmd with no face detection

clc
clear all;
close all;

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 start_cb(hObj,~)
cam=webcam(1);
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_Eyes=step(FDetect,I);
    imshow(I);
    hold on;
    if(sum(sum(BB_Eyes))==0)
    title('Face not detected');
    defaultString = 'Face not detected';
    NET.addAssembly('System.Speech');
    obj = System.Speech.Synthesis.SpeechSynthesizer;
    obj.Volume = 100;
    Speak(obj, defaultString);
    elseif(sum(sum(BB_Nose))==0 && sum(sum(BB_Mouth))==0)
    FDetect=vision.CascadeObjectDetector('FrontalFaceLBP','MergeThreshold',10);
    BB_Mouth=step(FDetect,I);
    if(sum(sum(BB_Mouth))~=0)
    title('Remove Hand Please');
    defaultString = 'Remove Hand from face.';
    NET.addAssembly('System.Speech');
    obj = System.Speech.Synthesis.SpeechSynthesizer;
    obj.Volume = 100;
    Speak(obj, defaultString);
    else
    title('Mask Present');
    defaultString = 'Thank You for wearing Mask.';
    NET.addAssembly('System.Speech');
    obj = System.Speech.Synthesis.SpeechSynthesizer;
    obj.Volume = 100;
    Speak(obj, defaultString);
    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
    title('Please wear mask properly');
    defaultString = 'Please wear mask properly.';
    NET.addAssembly('System.Speech');
    obj = System.Speech.Synthesis.SpeechSynthesizer;
    obj.Volume = 100;
    Speak(obj, defaultString);
    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
    title('Please wear Mask');
    defaultString = 'Please wear Mask.';
    NET.addAssembly('System.Speech');
    obj = System.Speech.Synthesis.SpeechSynthesizer;
    obj.Volume = 100;
    Speak(obj, defaultString);
    end

    pause(5)
    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