MATLAB: Parking space using IMAGE PROCESSING

Question

clc;
close all;
clear all;
%image acquisition
f=imread('C:\Users\vinoth\Downloads\jph.jpg');
f=imresize(f,[800 NaN]); % image loading unit
figure (1)
imshow(f)
g=rgb2gray(f);
g=medfilt2(g,[5 5]);
figure (2)
imshow (g)
% morphological image processing 
conc=strel('disk',5);
gi=imdilate(g,conc);
conc1=strel('disk',5);
ge=imerode(gi,conc1); % morphological image processing
gdiff=imsubtract(gi,ge);
gdiff1=mat2gray(gdiff);
figure (4)
imshow (gdiff1)
gdiff2=conv2(gdiff1,[1 1;1 1]);
figure  (5)
imshow (gdiff2)
gdiff3=imadjust(gdiff2,[0.4 0.9],[0 1],1);
figure (6)
imshow (gdiff3)
B=logical(gdiff3);
[a1 b1]=size(B);
figure(7)
imshow(B)
er=imerode(B,strel('line',60,8));
figure(8)
imshow(er)
out1=imsubtract(B,er);
F=imfill(out1,'holes'); %filling the object
H=bwmorph(F,'thin',0.5);
H=imerode(H,strel('line',8,55));
figure(9)
imshow(H)
%Normalization% & Object Recognition 
I=bwareaopen(H,floor((a1/18)*(b1/18)));
I(1:floor(.9*a1),1:2)=1;
I(a1:-1:(a1-20),b1:1:(b1-2))=1;
figure(10)
imshow(I)
%Cars detection in image
figure (11)
imshow pair (f,I)
%Create bounding box on detected cars
Iprops=regionprops(I,'BoundingBox','Image');
hold on
text(8,785,strcat('\color{green}Cars Detected:',num2str(length(Iprops))))
hold on
for n=2:size(Iprops,1)
rectangle('Position',Iprops(n).BoundingBox,'EdgeColor','g','LineWidth',2);
end
result = sprintf('Number of cars: %d.',n-1);
disp(result);% display number of cars
hold off

i am trying to do a project for parking space detection using image processing , the above program is the code ive been working on, whenever i am trying to run the code , it shows an error like this

??? Error using ==> imageDisplayParsePVPairs at 72
Invalid input arguments.
Error in ==> imageDisplayParseInputs at 70
[common_args,specific_args] = imageDisplayParsePVPairs(varargin{:});
Error in ==> imshow at 199
  [common_args,specific_args] = ...

i am not expert in matlab, i am a student trying to do a report on IMAGE PROCESSING if someone know what is the problem in this code?… if knew explain this to me.. i copied this code i didnt write this…

Answer 1

You've cut the error message and removed the most important bit, the last part which told you which line of your code is responsible for the error.

I'm guessing it may be this line:

imshow pair (f,I)

which should be written

imshowpair(f, I)

with no space between imshow and pair.