Why my code doesn't work in Matlab 2017, Although it works very well in Matlab 2013 ?

Hello,

I wrote a code via Matlab 2013 for processing images from video, and it works very well.

But when I run it on Matlab 2017, It works very slowly, and the response of sliders moving take a lot of time. then the button "OK" fails to respond at all.

Here is my code:

clc; clear;
% here you need to change the video you are working on
Vid = VideoReader('1.mp4');
Num_Frames = Vid.NumberOfFrames;
flag=1;
rot=0;
for k = 1:Num_Frames
    Img = read(Vid,k);
    if(k==1)
        mg=imresize(Img,[360,480]);
        imshow(mg)
        ss=input('Is your image rotated [yes or no]? ','s');
        if(strcmp(ss,'yes')==1)
            rot=1;
        end
        close all
    end
    if rot==1
        Img=imrotate(Img,-90);
    end
    Img=imresize(Img,[360,480]);
    if(k==1)
    f = figure('position', [150 75 900 600]);
    p = uipanel(f,'Position',[0.1 0.1 0.8 0.2]);
    lower=0; upper=255;
    c1 = uicontrol(p,'Style','slider','position',[40 60 370 20],'Min',0,'Max',255,'Value',lower);
    c2 = uicontrol(p,'Style','slider','position',[40 10 370 20],'Min',0,'Max',255,'Value',upper);
    c11 = uicontrol('Parent',p,'Style','text','Position',[10,60,20,20],...
                'String','0');
    c12 = uicontrol('Parent',p,'Style','text','Position',[420,60,20,20],...
                'String','255');
    c13 = uicontrol('Parent',p,'Style','text','Position',[210,80,30,20],...
                'String','lower');
    c21 = uicontrol('Parent',p,'Style','text','Position',[10,10,20,20],...
                'String','0');
    c22 = uicontrol('Parent',p,'Style','text','Position',[420,10,20,20],...
                'String','255');
    c23 = uicontrol('Parent',p,'Style','text','Position',[210,30,30,20],...
                'String','upper');
    but=uicontrol('parent',p,'Style','push','Position',[500,40,40,30],'String','OK','callback',{@Close});
    global ending;
    refe=[1,220,180,360];
    lower=[0,0]; upper=[255,255];
    for i=1:2
        ending=0;
        set(c1,'value',0);
        set(c2,'value',255);
        while ending==0
            img=imresize(Img,[240,360]);
            %img=img(:,refe(2*i-1):refe(2*i),:);
            img1=rgb2gray(img); img2=img1;
            lower(i)=get(c1,'value'); upper(i)=get(c2,'value');
            img2=img2(:,:)<upper(i) & img2(:,:)>lower(i);
            subplot('Position',[.1 .35 .4 .4]);
            imshow(img);
            subplot('Position',[.5 .35 .4 .4]);
            imshow(img2);
            pause(0.0001);
        end
    end
    close all;
    lowerleft=lower(1);
    lowerright=lower(2);
    upperleft=upper(1);
    upperright=upper(2);
    imshow(Img);
    close all;
    pause(1);
        disp('now we need to determine the region of intersest of the left curve')
        pause(1);
        figure,imshow(Img);
        disp('click on the upper left corner of the region')
        [x1,y1]=ginput(1);
        disp('click on the bottom right corner of the region')
        [x2,y2]=ginput(1);
        disp('now we need to determine the region of intersest of the right curve')
        pause(1);
        disp('click on the upper left corner of the region')
        [x3,y3]=ginput(1);
        disp('click on the bottom right corner of the region')
        [x4,y4]=ginput(1);
        pause(1)
        disp('now we need to measure 10 cm from the image');
        pause(1);
        disp('click on the first line');
        [x5,y5]=ginput(1);
        disp('click on the second line');
        [x6,y6]=ginput(1);
        close all;
        x=[x1,x2,x3,x4]; y=[y1,y2,y3,y4];
        x=round(x); y=round(y);
        close all
    end
    one_cm=abs(y6-y5)/10;
    img1=rgb2gray(Img); img2=img1;
    img2=img2(:,:)<upperright & img2(:,:)>lowerright;
    img1=img1(:,:)<upperleft & img1(:,:)>lowerleft ;
    mask1=zeros(360,480); mask2=mask1;
    mask1(y(1):y(2),x(1):x(2))=1;
    mask2(y(3):y(4),x(3):x(4))=1;
    img1=img1&mask1;
    img2=img2&mask2;
    img=img1|img2;
    se1 = strel('line',6,6);
    se2 = strel('line',4,4);
    erodedimg = imerode(img,se1);
    dilatedimg = imdilate(erodedimg,se2);
    finimg = imdilate(dilatedimg,se2);
    first_curve_center_y=0;
    second_curve_center_y=0;
    for i=y(1):y(2)
        for j=x(1):x(2)
            if(finimg(i,j)==1)
                first_curve_center_y=max(first_curve_center_y,i);
                break
            end
        end
    end
    for i=y(3):y(4)
        for j=x(3):x(4)
            if(finimg(i,j)==1)
                second_curve_center_y=max(second_curve_center_y,i);
                break;
            end
        end
    end
    prev_first_curve_center_y=0;
    prev_second_curve_center_y=0;
    if(first_curve_center_y==0 || second_curve_center_y==0)
        continue;
    end
    if(first_curve_center_y - prev_first_curve_center_y >5 && prev_first_curve_center_y~=0)
        prev_first_curve_center_y=first_curve_center_y;
        continue;
    end
    if(second_curve_center_y - prev_second_curve_center_y >5 && prev_second_curve_center_y~=0)
        prev_second_curve_center_y=second_curve_center_y;
        continue;
    end
    dis=abs(first_curve_center_y - second_curve_center_y)/one_cm;
    disp(k)
    disp(dis)
    if(flag==1)
        findistance=dis;
    else
        findistance=(dis+findistance*(flag-1))/flag;
    end
    flag=flag+1;
end
disp('The distance between the first curve and the second one in cm =')
disp(findistance);

The function Close.m:

function Close(source,ref)
    global ending
    ending=1;
end

Thanks a lot

[the cyclist]

I can't really say specifically why your particular code is slower in one older version of MATLAB than another, but there was a graphics overhaul in MATLAB in version 2014b.