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java.lang.Object org.opencv.core.Rect
public class Rect
Template class for 2D rectangles, described by the following parameters:
Rect_.x
and Rect_.y
in OpenCV. Though, in your
algorithms you may count x
and y
from the
bottom-left corner.
OpenCV typically assumes that the top and left boundary of the rectangle are
inclusive, while the right and bottom boundaries are not. For example, the
method Rect_.contains
returns true
if
x <= pt.x < x+width,<BR>y <= pt.y < y+height
Virtually every loop over an imageROI in OpenCV (where ROI is specified by
Rect_
) is implemented as:
// C++ code:
for(int y = roi.y; y < roi.y + rect.height; y++)
for(int x = roi.x; x < roi.x + rect.width; x++)
//...
In addition to the class members, the following operations on rectangles are
implemented:
rect += point, rect -= point, rect += size, rect -= size
(augmenting operations)
rect = rect1 & rect2
(rectangle intersection)
rect = rect1 | rect2
(minimum area rectangle containing
rect2
and rect3
)
rect &= rect1, rect |= rect1
(and the corresponding
augmenting operations)
rect == rect1, rect != rect1
(rectangle comparison)
This is an example how the partial ordering on rectangles can be established
(rect1subseteq rect2):
// C++ code:
template inline bool
operator <= (const Rect_<_Tp>& r1, const Rect_<_Tp>& r2)
return (r1 & r2) == r1;
For your convenience, the Rect_<>
alias is available:
typedef Rect_ Rect;
- See Also:
- org.opencv.core.Rect_
Field Summary
int
height
int
width
int
x
int
y
Constructor Summary
Rect()
Rect(double[] vals)
Rect(int x,
int y,
int width,
int height)
Rect(Point p1,
Point p2)
Rect(Point p,
Size s)
Method Summary
double
area()
Point
br()
Rect
clone()
boolean
contains(Point p)
boolean
equals(java.lang.Object obj)
int
hashCode()
void
set(double[] vals)
Size
size()
Point
tl()
java.lang.String
toString()
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
Field Detail
height
public int height
width
public int width
x
public int x
y
public int y
Constructor Detail
Rect
public Rect()
Rect
public Rect(double[] vals)
Rect
public Rect(int x,
int y,
int width,
int height)
Rect
public Rect(Point p1,
Point p2)
Rect
public Rect(Point p,
Size s)
Method Detail
area
public double area()
br
public Point br()
clone
public Rect clone()
- Overrides:
clone
in class java.lang.Object
contains
public boolean contains(Point p)
equals
public boolean equals(java.lang.Object obj)
- Overrides:
equals
in class java.lang.Object
hashCode
public int hashCode()
- Overrides:
hashCode
in class java.lang.Object
set
public void set(double[] vals)
size
public Size size()
tl
public Point tl()
toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object
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