cv::Range Class Reference

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

#include <opencv2/core/types.hpp>

Collaboration diagram for cv::Range:

Public Member Functions
	Range ()
	Range (int _start, int _end)
bool	empty () const
int	size () const

Static Public Member Functions
static Range	all ()

Public Attributes
int	end
int	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)
    }
}

Constructor & Destructor Documentation

Range() [1/2]

cv::Range::Range

(

)

Range() [2/2]

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

Member Function Documentation

all()

static Range cv::Range::all ( )

static

empty()

bool cv::Range::empty

(

)

const

size()

int cv::Range::size

(

)

const

Member Data Documentation

end

int cv::Range::end

start

int cv::Range::start

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

• opencv2/core/types.hpp