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convert serial into parallel

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HUSNAIN RASHID
HUSNAIN RASHID on 21 May 2018
while converting from serial to parallel , i encountered with some dependency variable related problems. the variables initiated outside the parfor loop cant use inside the loop. variables like row_counter, column_counter and r causing problem, am new to matlab so please help. my code is below !!!!
myfile=dir('path\*.jpg'); % the folder inwhich ur images exists
myfile2=dir('path\*.jpg'); % the folder inwhich ur centroid images exists
row_counter=1;
column_counter= 1;
r=0;
parfor i = 1 : length(myfile)
filename = strcat('path:',myfile(i).name);
img= imread(filename);
k=datafilename;
L1=load (k,'data'); % Making it a structure
label=L1.data(:,5);
for j=1: size(L1.data,1)
C1 = image()
for h = 1 : length(myfile2) %%OPening the centroid Image
filename2 = strcat('D:path\',myfile2(h).name);
C2=imread(filename2);
im_A=rgb2gray(C1);
im_B=rgb2gray(C2);
r(row_counter,column_counter)=corr2(im_A,im_B);
Parsave(r);
column_counter=1+column_counter;
end
r(row_counter,column_counter)=L1.data(j,5);% Assigning label in the end
row_counter=row_counter+1;
column_counter=1; % col counter reset
end
end

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