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6b2510d3
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6b2510d3
编写于
8月 14, 2017
作者:
A
Alexander Alekhin
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差异文件
Merge pull request #9317 from sturkmen72:warpPerspective_demo
上级
a048cb9f
8bb3863f
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
184 addition
and
0 deletion
+184
-0
modules/imgproc/include/opencv2/imgproc.hpp
modules/imgproc/include/opencv2/imgproc.hpp
+3
-0
samples/cpp/warpPerspective_demo.cpp
samples/cpp/warpPerspective_demo.cpp
+181
-0
未找到文件。
modules/imgproc/include/opencv2/imgproc.hpp
浏览文件 @
6b2510d3
...
...
@@ -2264,6 +2264,9 @@ CV_EXPORTS_W void warpAffine( InputArray src, OutputArray dst,
int
borderMode
=
BORDER_CONSTANT
,
const
Scalar
&
borderValue
=
Scalar
());
/** @example warpPerspective_demo.cpp
An example program shows using cv::findHomography and cv::warpPerspective for image warping
*/
/** @brief Applies a perspective transformation to an image.
The function warpPerspective transforms the source image using the specified matrix:
...
...
samples/cpp/warpPerspective_demo.cpp
0 → 100644
浏览文件 @
6b2510d3
/**
@file warpPerspective_demo.cpp
@brief a demo program shows how perspective transformation applied on an image
@based on a sample code http://study.marearts.com/2015/03/image-warping-using-opencv.html
@modified by Suleyman TURKMEN
*/
#include "opencv2/imgproc.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"
#include "opencv2/calib3d.hpp"
#include <iostream>
using
namespace
std
;
using
namespace
cv
;
static
void
help
(
char
**
argv
)
{
// print a welcome message, and the OpenCV version
cout
<<
"
\n
This is a demo program shows how perspective transformation applied on an image,
\n
"
"Using OpenCV version "
<<
CV_VERSION
<<
endl
;
cout
<<
"
\n
Usage:
\n
"
<<
argv
[
0
]
<<
" [image_name -- Default ../data/right.jpg]
\n
"
<<
endl
;
cout
<<
"
\n
Hot keys:
\n
"
"
\t
ESC, q - quit the program
\n
"
"
\t
r - change order of points to rotate transformation
\n
"
"
\t
c - delete selected points
\n
"
"
\t
i - change order of points to invers transformation
\n
"
"
\n
Use your mouse to select a point and move it to see transformation changes"
<<
endl
;
}
static
void
onMouse
(
int
event
,
int
x
,
int
y
,
int
,
void
*
);
Mat
warping
(
Mat
image
,
Size
warped_image_size
,
vector
<
Point2f
>
srcPoints
,
vector
<
Point2f
>
dstPoints
);
String
windowTitle
=
"Perspective Transformation Demo"
;
String
labels
[
4
]
=
{
"TL"
,
"TR"
,
"BR"
,
"BL"
};
vector
<
Point2f
>
roi_corners
;
vector
<
Point2f
>
dst_corners
(
4
);
int
roiIndex
=
0
;
bool
dragging
;
int
selected_corner_index
=
0
;
bool
validation_needed
=
true
;
int
main
(
int
argc
,
char
**
argv
)
{
help
(
argv
);
CommandLineParser
parser
(
argc
,
argv
,
"{@input| ../data/right.jpg |}"
);
string
filename
=
parser
.
get
<
string
>
(
"@input"
);
Mat
original_image
=
imread
(
filename
);
Mat
image
;
float
original_image_cols
=
(
float
)
original_image
.
cols
;
float
original_image_rows
=
(
float
)
original_image
.
rows
;
roi_corners
.
push_back
(
Point2f
(
(
float
)(
original_image_cols
/
1.70
),
(
float
)(
original_image_rows
/
4.20
)
));
roi_corners
.
push_back
(
Point2f
(
(
float
)(
original_image
.
cols
/
1.15
),
(
float
)(
original_image
.
rows
/
3.32
)
));
roi_corners
.
push_back
(
Point2f
(
(
float
)(
original_image
.
cols
/
1.33
),
(
float
)(
original_image
.
rows
/
1.10
)
));
roi_corners
.
push_back
(
Point2f
(
(
float
)(
original_image
.
cols
/
1.93
),
(
float
)(
original_image
.
rows
/
1.36
)
));
namedWindow
(
windowTitle
,
WINDOW_NORMAL
);
namedWindow
(
"Warped Image"
,
WINDOW_AUTOSIZE
);
moveWindow
(
"Warped Image"
,
20
,
20
);
moveWindow
(
windowTitle
,
330
,
20
);
setMouseCallback
(
windowTitle
,
onMouse
,
0
);
bool
endProgram
=
false
;
while
(
!
endProgram
)
{
if
(
validation_needed
&
(
roi_corners
.
size
()
<
4
)
)
{
validation_needed
=
false
;
image
=
original_image
.
clone
();
for
(
size_t
i
=
0
;
i
<
roi_corners
.
size
();
++
i
)
{
circle
(
image
,
roi_corners
[
i
],
5
,
Scalar
(
0
,
255
,
0
),
3
);
if
(
i
>
0
)
{
line
(
image
,
roi_corners
[
i
-
1
],
roi_corners
[(
i
)],
Scalar
(
0
,
0
,
255
),
2
);
circle
(
image
,
roi_corners
[
i
],
5
,
Scalar
(
0
,
255
,
0
),
3
);
putText
(
image
,
labels
[
i
].
c_str
(),
roi_corners
[
i
],
QT_FONT_NORMAL
,
0.8
,
Scalar
(
255
,
0
,
0
),
2
);
}
}
imshow
(
windowTitle
,
image
);
}
if
(
validation_needed
&
(
roi_corners
.
size
()
==
4
))
{
image
=
original_image
.
clone
();
for
(
int
i
=
0
;
i
<
4
;
++
i
)
{
line
(
image
,
roi_corners
[
i
],
roi_corners
[(
i
+
1
)
%
4
],
Scalar
(
0
,
0
,
255
),
2
);
circle
(
image
,
roi_corners
[
i
],
5
,
Scalar
(
0
,
255
,
0
),
3
);
putText
(
image
,
labels
[
i
].
c_str
(),
roi_corners
[
i
],
QT_FONT_NORMAL
,
0.8
,
Scalar
(
255
,
0
,
0
),
2
);
}
imshow
(
windowTitle
,
image
);
dst_corners
[
0
].
x
=
0
;
dst_corners
[
0
].
y
=
0
;
dst_corners
[
1
].
x
=
(
float
)
std
::
max
(
norm
(
roi_corners
[
0
]
-
roi_corners
[
1
]),
norm
(
roi_corners
[
2
]
-
roi_corners
[
3
]));
dst_corners
[
1
].
y
=
0
;
dst_corners
[
2
].
x
=
(
float
)
std
::
max
(
norm
(
roi_corners
[
0
]
-
roi_corners
[
1
]),
norm
(
roi_corners
[
2
]
-
roi_corners
[
3
]));
dst_corners
[
2
].
y
=
(
float
)
std
::
max
(
norm
(
roi_corners
[
1
]
-
roi_corners
[
2
]),
norm
(
roi_corners
[
3
]
-
roi_corners
[
0
]));
dst_corners
[
3
].
x
=
0
;
dst_corners
[
3
].
y
=
(
float
)
std
::
max
(
norm
(
roi_corners
[
1
]
-
roi_corners
[
2
]),
norm
(
roi_corners
[
3
]
-
roi_corners
[
0
]));
Size
warped_image_size
=
Size
(
cvRound
(
dst_corners
[
2
].
x
),
cvRound
(
dst_corners
[
2
].
y
));
Mat
H
=
findHomography
(
roi_corners
,
dst_corners
);
//get homography
Mat
warped_image
;
warpPerspective
(
original_image
,
warped_image
,
H
,
warped_image_size
);
// do perspective transformation
imshow
(
"Warped Image"
,
warped_image
);
}
char
c
=
(
char
)
waitKey
(
10
);
if
((
c
==
'q'
)
|
(
c
==
'Q'
)
|
(
c
==
27
))
{
endProgram
=
true
;
}
if
((
c
==
'c'
)
|
(
c
==
'C'
))
{
roi_corners
.
clear
();
}
if
((
c
==
'r'
)
|
(
c
==
'R'
))
{
roi_corners
.
push_back
(
roi_corners
[
0
]);
roi_corners
.
erase
(
roi_corners
.
begin
());
}
if
((
c
==
'i'
)
|
(
c
==
'I'
))
{
swap
(
roi_corners
[
0
],
roi_corners
[
1
]);
swap
(
roi_corners
[
2
],
roi_corners
[
3
]);
}
}
return
0
;
}
static
void
onMouse
(
int
event
,
int
x
,
int
y
,
int
,
void
*
)
{
// Action when left button is pressed
if
(
roi_corners
.
size
()
==
4
)
{
for
(
int
i
=
0
;
i
<
4
;
++
i
)
{
if
((
event
==
EVENT_LBUTTONDOWN
)
&
((
abs
(
roi_corners
[
i
].
x
-
x
)
<
10
))
&
(
abs
(
roi_corners
[
i
].
y
-
y
)
<
10
))
{
selected_corner_index
=
i
;
dragging
=
true
;
}
}
}
else
if
(
event
==
EVENT_LBUTTONDOWN
)
{
roi_corners
.
push_back
(
Point2f
(
(
float
)
x
,
(
float
)
y
)
);
validation_needed
=
true
;
}
// Action when left button is released
if
(
event
==
EVENT_LBUTTONUP
)
{
dragging
=
false
;
}
// Action when left button is pressed and mouse has moved over the window
if
((
event
==
EVENT_MOUSEMOVE
)
&&
dragging
)
{
roi_corners
[
selected_corner_index
].
x
=
(
float
)
x
;
roi_corners
[
selected_corner_index
].
y
=
(
float
)
y
;
validation_needed
=
true
;
}
}
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