How to save images in a folder?

I want to read 2 images, do something to those images and then save those two images in a folder. I have used for loop. I am able to read both the images but only first image is getting saved in the folder. Following is my code. What changes should be done in order to save both the images in a folder.

 c=cell(1,2);
 for m=1:2
 I=imread(sprintf('isha%d.jpg',m));

 %To detect Mouth
 MouthDetect = vision.CascadeObjectDetector('Mouth','MergeThreshold',120);
 BB=step(MouthDetect,I);
 figure,
 imshow(I); hold on
    for i = 1:size(BB,1)
      rectangle('Position',BB(i,:),'LineWidth',4,'LineStyle','-','EdgeColor','r');
    end
     x=imcrop(I,BB);
     y= imcomplement(x);
     figure, imshow(y);
     imwrite(y,strcat('D:\implementation\featurescrop\mouth__',num2str(i),'.jpg'));
     hold off;
%To detect Eyes
EyeDetect = vision.CascadeObjectDetector('EyePairBig');
BB=step(EyeDetect,I);
hold on
rectangle('Position',BB,'LineWidth',4,'LineStyle','-','EdgeColor','b')
 x=imcrop(I,BB);
y= imcomplement(x);
figure, imshow(y);
imwrite(y,strcat('D:\implementation\featurescrop\eyes__',num2str(i),'.jpg'));
hold off;
%to detect nose
 NoseDetect = vision.CascadeObjectDetector('Nose','MergeThreshold',85);
BB=step(NoseDetect,I);
figure,
imshow(I); hold on
for i = 1:size(BB,1)
    rectangle('Position',BB(i,:),'LineWidth',4,'LineStyle','-','EdgeColor','b');
end
title('Nose Detection');
hold off;
x=imcrop(I,BB); 
y= imcomplement(x);
figure, imshow(y);
imwrite(y,strcat('D:\implementation\featurescrop\nose__',num2str(i),'.jpg'));
hold off;
end

[KSSV]

What is size of BB? Put your code in debugging mode and check line by line.

[Isha Pandya]

In the line, for i=1:size(BB,1) what does 1 in the bracket indicate ? Can you please explain me as I am new to matlab.

[Isha Pandya]

while debugging it says value of BB is [168,253,79,48] and min=48, max=253.

[Ganesh Hegade]

size command always return 1x2 double data. for example if

BB = [168,253,79,48];
>> size(BB)

ans =

       1     4

size(BB,1) gives only the first value of the output.

   BB = [168,253,79,48];
  >> size(BB,1)

ans =

       1

So in your code loop is running for only first element.

Answer 1

[KSSV]

As the size(BB,1) is 1, your loop runs only for once....As you said you are reading two images....change loop to:

for i = 1:2

%%%%

end