Imwrite sequence of images in a folder in opencv
Using VS 2010 in C ++ and tried to put this in a for loop
String filename = "cropped_" + (ct+1);
imwrite(filename + ".jpg", img_cropped);
These are the names of the files that came out:
ropped_.jpg
opped_.jpg
pped_.jpg
How should I do it? And how do I put them in a folder in the same directory as the source code?
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You can use std::stringstream
to create sequential filenames:
First include the header sstream
from the C ++ Standard Library.
#include<sstream>
using namespace std;
Then, inside your code, you can do the following:
stringstream ss;
string name = "cropped_";
string type = ".jpg";
ss<<name<<(ct + 1)<<type;
string filename = ss.str();
ss.str("");
imwrite(filename, img_cropped);
To create a new folder, you can use the windows command mkdir
in a function system
from stdlib.h
:
string folderName = "cropped";
string folderCreateCommand = "mkdir " + folderName;
system(folderCreateCommand.c_str());
ss<<folderName<<"/"<<name<<(ct + 1)<<type;
string fullPath = ss.str();
ss.str("");
imwrite(fullPath, img_cropped);
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Try the following:
char file_name[100];
sprintf(file_name, "cropped%d.jpg", ct + 1);
imwrite(file_name, img_cropped);
They should just go into the directory where you run your code, otherwise you'll have to manually specify it like this:
sprintf(file_name, "C:\path\to\source\code\cropped%d.jpg", ct + 1);
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for (int ct = 0; ct < img_SIZE ; ct++){
char filename[100];
char f_id[3]; //store int to char*
strcpy(filename, "cropped_");
itoa(ct, f_id, 10);
strcat(filename, f_id);
strcat(filename, ".jpg");
imwrite(filename, img_cropped); }
By the way, here's a longer version of @ sgar91's answer
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