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OpenCV 2.4.3.1 | |||||||
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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
operator <= (const Rect_<_Tp>& r1, const Rect_<_Tp>& r2)
return (r1 & r2) == r1;
For your convenience, the Rect_<>
alias is available:
typedef Rect_
Field Summary | |
---|---|
int |
height
|
int |
width
|
int |
x
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int |
y
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Constructor Summary | |
---|---|
Rect()
|
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Rect(double[] vals)
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Rect(int x,
int y,
int width,
int height)
|
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Rect(Point p1,
Point p2)
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Rect(Point p,
Size s)
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Method Summary | |
---|---|
double |
area()
|
Point |
br()
|
Rect |
clone()
|
boolean |
contains(Point p)
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boolean |
equals(java.lang.Object obj)
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int |
hashCode()
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void |
set(double[] vals)
|
Size |
size()
|
Point |
tl()
|
java.lang.String |
toString()
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Methods inherited from class java.lang.Object |
---|
finalize, getClass, notify, notifyAll, wait, wait, wait |
Field Detail |
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public int height
public int width
public int x
public int y
Constructor Detail |
---|
public Rect()
public Rect(double[] vals)
public Rect(int x, int y, int width, int height)
public Rect(Point p1, Point p2)
public Rect(Point p, Size s)
Method Detail |
---|
public double area()
public Point br()
public Rect clone()
clone
in class java.lang.Object
public boolean contains(Point p)
public boolean equals(java.lang.Object obj)
equals
in class java.lang.Object
public int hashCode()
hashCode
in class java.lang.Object
public void set(double[] vals)
public Size size()
public Point tl()
public java.lang.String toString()
toString
in class java.lang.Object
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Official OpenCV 2.4 Documentation | |||||||
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