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Frst read function this page :

core module is #include<opencv2 core.h="">

imgprocmodule is #include<opencv2 imgproc.h="">

Then read function doc example findcontours It is in imgproc module (read link or at the beginning of the page it is written image processing)

or you can use only #include <opencv2 opencv.hpp=""> all module in opencv will be included and opencv only. For opencv_contrib apply first recipe

Frst read function this page page :

core module is #include<opencv2 core.h="">

imgprocmodule is #include<opencv2 imgproc.h="">

Then read function doc example findcontours It is in imgproc module (read link or at the beginning of the page it is written image processing)

or you can use only #include <opencv2 opencv.hpp=""> all module in opencv will be included and opencv only. For opencv_contrib apply first recipe

Frst read function this page :

core module is #include<opencv2 core.h=""># include< opencv2/core.h >

imgprocmodule is #include<opencv2 imgproc.h=""># include< opencv2/imgproc.h >

Then read function doc example findcontours It is in imgproc module (read link or at the beginning of the page it is written image processing)

or you can use only #include <opencv2 opencv.hpp=""> all module in opencv will be included and opencv only. For opencv_contrib apply first recipe

Frst read function this page :

core module is # include< opencv2/core.h >

imgprocmodule is # include< opencv2/imgproc.h >

Then read function doc example findcontours It is in imgproc module (read link or at the beginning of the page it is written image processing)

or you can use only #include <opencv2 opencv.hpp=""> < opencv2/opencv.hpp > all module in opencv will be included and opencv only. For opencv_contrib apply first recipe

Frst read function this page :

core module is # include< opencv2/core.h opencv2/core.hpp >

imgprocmodule is # include< opencv2/imgproc.h opencv2/imgproc.hpp >

Then read function doc example findcontours It is in imgproc module (read link or at the beginning of the page it is written image processing)

or you can use only #include < opencv2/opencv.hpp > all module in opencv will be included and opencv only. For opencv_contrib apply first recipe

Frst First read documentation of the function in this page :

header for core module is # include< opencv2/core.hpp >include<opencv2/core.hpp>

imgprocmodule header for imgproc module is # include< opencv2/imgproc.hpp >include<opencv2/imgproc.hpp>

header for highgui module is #include <opencv2/highgui.hpp>

Then read function doc example findcontours It is in imgproc module (read link or at the beginning of the page it is written image processing)

or you can use only #include < opencv2/opencv.hpp > all module in opencv will be included and opencv only. For opencv_contrib apply first recipe

First read documentation of the function in this page :

header for core core. Core functionality module is # include<opencv2/core.hpp>

header for imgproc imgproc. Image Processing module is # include<opencv2/imgproc.hpp>

header for highgui highgui. High-level GUI module is #include <opencv2/highgui.hpp>

.

.

Then read for example documentation of function doc example findcontours It is in imgproc module (read link or at the beginning of the page it is written image processing)Image Processing)

or you can use only #include < opencv2/opencv.hpp > <opencv2/opencv.hpp> all module in opencv will be included and opencv only. only.

For opencv_contrib apply first recipe

First read documentation of the function take a look at "OpenCV modules" in this pageDocumentation :

header for core. Core functionality module is # include<opencv2/core.hpp>

header for imgproc. Image Processing module is # include<opencv2/imgproc.hpp>

header for highgui. High-level GUI module is #include <opencv2/highgui.hpp>

....

.and so on.

Then read for example documentation of function findcontours It is in imgproc module (read link or at the beginning of the page it is written Image Processing)

or you can use only #include <opencv2/opencv.hpp> all module in opencv will be included and opencv only.

For opencv_contrib apply first recipe