Class cv::Range#

Template class specifying a continuous subsequence (slice) of a sequence. View details

#include <opencv2/core/types.hpp>

Collaboration diagram for cv::Range:

cv::Range Node1 cv::Range   + Range() + Range() + empty() + size() + all() Node2 int     Node2->Node1 +end +start

cv::Range Node1 cv::Range   + Range() + Range() + empty() + size() + all() Node2 int     Node2->Node1 +end +start

Detailed Description#

Template class specifying a continuous subsequence (slice) of a sequence.

The class is used to specify a row or a column span in a matrix ( Mat ) and for many other purposes. Range(a,b) is basically the same as a:b in Matlab or a..b in Python. As in Python, start is an inclusive left boundary of the range and end is an exclusive right boundary of the range. Such a half-opened interval is usually denoted as \([start,end)\) .

The static method Range::all()

returns a special variable that means “the whole sequence” or “the

whole range”, just like “ : “ in Matlab or “ … “ in Python. All the methods and functions in OpenCV that take

Range support this special Range::all() value. But, of course, in case of your own custom processing, you will probably have to check and handle it explicitly: 
void my_function(..., const Range& r, ....)
{
    if(r == Range::all()) {
        // process all the data
    }
    else {
        // process [r.start, r.end)
    }
}

Examples
samples/cpp/floodfill.cpp.

Constructor & Destructor Documentation#

Range()#

cv::Range::Range()

Range()#

cv::Range::Range(
int _start,
int _end )

Member Function Documentation#

empty()#

bool cv::Range::empty()

size()#

int cv::Range::size()

all()#

static Range cv::Range::all()

Member Data Documentation#

end#

int cv::Range::end

start#

int cv::Range::start

Source file#

The documentation for this class was generated from the following file: