How to end "while ~isempty(videoFrame)" loop ?

_if true
f=1;
frame=1;
bbox_w=[0 0 0 0];
l=0;

    while ~isempty(videoFrame )
videoFrame      = step(videoFileReader);
l=l+1;
bbox  = step(faceDetector, videoFrame);
bbox(bbox(:,3)<90,:)=[];
bbox(bbox(:,4)<90,:)=[];
bbox_w=[bbox_w; bbox];
if mod(frame,4)==0
    ile=size(bbox,1);

    if ile>0
        for i=1:ile
            figure('Visible','off')
            imshow(videoFrame(bbox(i,2):bbox(i,2)+bbox(i,4),bbox(i,1):bbox(i,1)+bbox(i,3),:))  
            text(10,10,'test')
            text(30,30,'test')
            title(['Face nr ', num2str(f)])
            sb=size(bbox_w);
%       b=bbox(i,:);
%       a1=bbox_w(sb(1,1),1)
%       a2=bbox_w(sb(1,1),2)
%       c1=bbox_w(sb(1,1)-1,1)
%       c2=bbox_w(sb(1,1)-1,2)
%       d1=bbox_w(sb(1,1)-2,1)
%       d2=bbox_w(sb(1,1)-2,2)   
%       e1=bbox_w(sb(1,1)-3,1)
%       e2=bbox_w(sb(1,1)-3,2)  
            if abs(bbox(i,1)-bbox_w(sb(1,1),1))>100 && abs(bbox(i,2)-bbox_w(sb(1,1),2))>100
            I = imcrop(videoFrame,bbox(i,:));
            saveas(gcf,['Face nr ',num2str(f),'.jpg'])
            %close(gcf)% 
            f=f+1;
            elseif abs(bbox(i,1)-bbox_w(sb(1,1)-1,1))>100 && abs(bbox(i,2)-bbox_w(sb(1,1)-1,2))>100
            I = imcrop(videoFrame,bbox(i,:));
            saveas(gcf,['Face nr ',num2str(f),'.jpg'])
            f=f+1;
            %close(gcf) 
            elseif abs(bbox(i,1)-bbox_w(sb(1,1)-2,1))>100 && abs(bbox(i,2)-bbox_w(sb(1,1)-2,2))>100
            I = imcrop(videoFrame,bbox(i,:));
            saveas(gcf,['Face nr ',num2str(f),'.jpg'])
            f=f+1;
            elseif abs(bbox(i,1)-bbox_w(sb(1,1)-3,1))>100 && abs(bbox(i,2)-bbox_w(sb(1,1)-3,2))>100
            I = imcrop(videoFrame,bbox(i,:));
            saveas(gcf,['Face nr ',num2str(f),'.jpg'])
            f=f+1;
            end
        end

    end
end

end_

Answer 1

[Geoff Hayes]

bfjk12 - are you checking on some condition to decide to prematurely exit the while loop? If so, then just use break to end or exit the while loop.

Looking at your code, you seem to be missing an end which is for the while loop. Perhaps that is what you mean instead. It is best to format your code in such a way that it readable and then you can spot where something might be missing

while ~isempty(videoFrame )
    videoFrame      = step(videoFileReader);
    l=l+1;
    bbox  = step(faceDetector, videoFrame);
    bbox(bbox(:,3)<90,:)=[];
    bbox(bbox(:,4)<90,:)=[];
    bbox_w=[bbox_w; bbox];
    if mod(frame,4)==0
        ile=size(bbox,1);
        if ile>0
            for i=1:ile
                figure('Visible','off')
                imshow(videoFrame(bbox(i,2):bbox(i,2)+bbox(i,4),bbox(i,1):bbox(i,1)+bbox(i,3),:))  
                text(10,10,'test')
                text(30,30,'test')
                title(['Face nr ', num2str(f)])
                sb=size(bbox_w);
        %       b=bbox(i,:);
        %       a1=bbox_w(sb(1,1),1)
        %       a2=bbox_w(sb(1,1),2)
        %       c1=bbox_w(sb(1,1)-1,1)
        %       c2=bbox_w(sb(1,1)-1,2)
        %       d1=bbox_w(sb(1,1)-2,1)
        %       d2=bbox_w(sb(1,1)-2,2)   
        %       e1=bbox_w(sb(1,1)-3,1)
        %       e2=bbox_w(sb(1,1)-3,2)  
                if abs(bbox(i,1)-bbox_w(sb(1,1),1))>100 && abs(bbox(i,2)-bbox_w(sb(1,1),2))>100
                    I = imcrop(videoFrame,bbox(i,:));
                    saveas(gcf,['Face nr ',num2str(f),'.jpg'])
                    %close(gcf)% 
                    f=f+1;
                elseif abs(bbox(i,1)-bbox_w(sb(1,1)-1,1))>100 && abs(bbox(i,2)-bbox_w(sb(1,1)-1,2))>100
                    I = imcrop(videoFrame,bbox(i,:));
                    saveas(gcf,['Face nr ',num2str(f),'.jpg'])
                    f=f+1;
                    %close(gcf) 
                elseif abs(bbox(i,1)-bbox_w(sb(1,1)-2,1))>100 && abs(bbox(i,2)-bbox_w(sb(1,1)-2,2))>100
                    I = imcrop(videoFrame,bbox(i,:));
                    saveas(gcf,['Face nr ',num2str(f),'.jpg'])
                    f=f+1;
                elseif abs(bbox(i,1)-bbox_w(sb(1,1)-3,1))>100 && abs(bbox(i,2)-bbox_w(sb(1,1)-3,2))>100
                    I = imcrop(videoFrame,bbox(i,:));
                    saveas(gcf,['Face nr ',num2str(f),'.jpg'])
                    f=f+1;
                end
            end
        end
    end
end % <---- this was missing