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Commit 13317bdf authored by tribta's avatar tribta
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Tutorial Basic Geometric Drawing

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doc/tutorials/core/table_of_content_core.markdown
View file @ 13317bdf
......@@ -58,6 +58,8 @@ understanding how to manipulate the images on a pixel level.
- @subpage tutorial_basic_geometric_drawing
*Languages:* C++, Java, Python
*Compatibility:* \> OpenCV 2.0
*Author:* Ana Huamán
......
samples/cpp/tutorial_code/core/Matrix/Drawing_1.cpp
View file @ 13317bdf
/**
* @file Drawing_1.cpp
* @brief Simple sample code
* @brief Simple geometric drawing
* @author OpenCV team
*/
#include <opencv2/core.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/highgui.hpp>
......@@ -83,11 +83,11 @@ int main( void ){
/// Function Declaration
//![myellipse]
/**
* @function MyEllipse
* @brief Draw a fixed-size ellipse with different angles
*/
//![my_ellipse]
void MyEllipse( Mat img, double angle )
{
int thickness = 2;
......@@ -103,13 +103,13 @@ void MyEllipse( Mat img, double angle )
thickness,
lineType );
}
//![myellipse]
//![my_ellipse]
//![myfilledcircle]
/**
* @function MyFilledCircle
* @brief Draw a fixed-size filled circle
*/
//![my_filled_circle]
void MyFilledCircle( Mat img, Point center )
{
circle( img,
......@@ -119,13 +119,13 @@ void MyFilledCircle( Mat img, Point center )
FILLED,
LINE_8 );
}
//![myfilledcircle]
//![my_filled_circle]
//![mypolygon]
/**
* @function MyPolygon
* @brief Draw a simple concave polygon (rook)
*/
//![my_polygon]
void MyPolygon( Mat img )
{
int lineType = LINE_8;
......@@ -163,17 +163,18 @@ void MyPolygon( Mat img )
Scalar( 255, 255, 255 ),
lineType );
}
//![mypolygon]
//![my_polygon]
//![myline]
/**
* @function MyLine
* @brief Draw a simple line
*/
//![my_line]
void MyLine( Mat img, Point start, Point end )
{
int thickness = 2;
int lineType = LINE_8;
line( img,
start,
end,
......@@ -181,4 +182,4 @@ void MyLine( Mat img, Point start, Point end )
thickness,
lineType );
}
//![myline]
//![my_line]
samples/java/tutorial_code/core/BasicGeometricDrawing/BasicGeometricDrawing.java 0 → 100644
View file @ 13317bdf
import org.opencv.core.*;
import org.opencv.core.Point;
import org.opencv.highgui.HighGui;
import org.opencv.imgproc.Imgproc;
import java.util.*;
import java.util.List;
class GeometricDrawingRun{
private static final int W = 400;
public void run(){
//! [create_images]
/// Windows names
String atom_window = "Drawing 1: Atom";
String rook_window = "Drawing 2: Rook";
/// Create black empty images
Mat atom_image = Mat.zeros( W, W, CvType.CV_8UC3 );
Mat rook_image = Mat.zeros( W, W, CvType.CV_8UC3 );
//! [create_images]
//! [draw_atom]
/// 1. Draw a simple atom:
/// -----------------------
MyEllipse( atom_image, 90.0 );
MyEllipse( atom_image, 0.0 );
MyEllipse( atom_image, 45.0 );
MyEllipse( atom_image, -45.0 );
/// 1.b. Creating circles
MyFilledCircle( atom_image, new Point( W/2, W/2) );
//! [draw_atom]
//! [draw_rook]
/// 2. Draw a rook
/// ------------------
/// 2.a. Create a convex polygon
MyPolygon( rook_image );
//! [rectangle]
/// 2.b. Creating rectangles
Imgproc.rectangle( rook_image,
new Point( 0, 7*W/8 ),
new Point( W, W),
new Scalar( 0, 255, 255 ),
-1,
8,
0 );
//! [rectangle]
/// 2.c. Create a few lines
MyLine( rook_image, new Point( 0, 15*W/16 ), new Point( W, 15*W/16 ) );
MyLine( rook_image, new Point( W/4, 7*W/8 ), new Point( W/4, W ) );
MyLine( rook_image, new Point( W/2, 7*W/8 ), new Point( W/2, W ) );
MyLine( rook_image, new Point( 3*W/4, 7*W/8 ), new Point( 3*W/4, W ) );
//! [draw_rook]
/// 3. Display your stuff!
HighGui.imshow( atom_window, atom_image );
HighGui.moveWindow( atom_window, 0, 200 );
HighGui.imshow( rook_window, rook_image );
HighGui.moveWindow( rook_window, W, 200 );
HighGui.waitKey( 0 );
System.exit(0);
}
/// Function Declaration
/**
* @function MyEllipse
* @brief Draw a fixed-size ellipse with different angles
*/
//! [my_ellipse]
private void MyEllipse( Mat img, double angle ) {
int thickness = 2;
int lineType = 8;
int shift = 0;
Imgproc.ellipse( img,
new Point( W/2, W/2 ),
new Size( W/4, W/16 ),
angle,
0.0,
360.0,
new Scalar( 255, 0, 0 ),
thickness,
lineType,
shift );
}
//! [my_ellipse]
/**
* @function MyFilledCircle
* @brief Draw a fixed-size filled circle
*/
//! [my_filled_circle]
private void MyFilledCircle( Mat img, Point center ) {
int thickness = -1;
int lineType = 8;
int shift = 0;
Imgproc.circle( img,
center,
W/32,
new Scalar( 0, 0, 255 ),
thickness,
lineType,
shift );
}
//! [my_filled_circle]
/**
* @function MyPolygon
* @function Draw a simple concave polygon (rook)
*/
//! [my_polygon]
private void MyPolygon( Mat img ) {
int lineType = 8;
int shift = 0;
/** Create some points */
Point[] rook_points = new Point[20];
rook_points[0] = new Point( W/4, 7*W/8 );
rook_points[1] = new Point( 3*W/4, 7*W/8 );
rook_points[2] = new Point( 3*W/4, 13*W/16 );
rook_points[3] = new Point( 11*W/16, 13*W/16 );
rook_points[4] = new Point( 19*W/32, 3*W/8 );
rook_points[5] = new Point( 3*W/4, 3*W/8 );
rook_points[6] = new Point( 3*W/4, W/8 );
rook_points[7] = new Point( 26*W/40, W/8 );
rook_points[8] = new Point( 26*W/40, W/4 );
rook_points[9] = new Point( 22*W/40, W/4 );
rook_points[10] = new Point( 22*W/40, W/8 );
rook_points[11] = new Point( 18*W/40, W/8 );
rook_points[12] = new Point( 18*W/40, W/4 );
rook_points[13] = new Point( 14*W/40, W/4 );
rook_points[14] = new Point( 14*W/40, W/8 );
rook_points[15] = new Point( W/4, W/8 );
rook_points[16] = new Point( W/4, 3*W/8 );
rook_points[17] = new Point( 13*W/32, 3*W/8 );
rook_points[18] = new Point( 5*W/16, 13*W/16 );
rook_points[19] = new Point( W/4, 13*W/16 );
MatOfPoint matPt = new MatOfPoint();
matPt.fromArray(rook_points);
List<MatOfPoint> ppt = new ArrayList<MatOfPoint>();
ppt.add(matPt);
Imgproc.fillPoly(img,
ppt,
new Scalar( 255, 255, 255 ),
lineType,
shift,
new Point(0,0) );
}
//! [my_polygon]
/**
* @function MyLine
* @brief Draw a simple line
*/
//! [my_line]
private void MyLine( Mat img, Point start, Point end ) {
int thickness = 2;
int lineType = 8;
int shift = 0;
Imgproc.line( img,
start,
end,
new Scalar( 0, 0, 0 ),
thickness,
lineType,
shift );
}
//! [my_line]
}
public class BasicGeometricDrawing {
public static void main(String[] args) {
// Load the native library.
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
new GeometricDrawingRun().run();
}
}
samples/python/tutorial_code/core/BasicGeometricDrawing/basic_geometric_drawing.py 0 → 100644
View file @ 13317bdf
import cv2
import numpy as np
W = 400
## [my_ellipse]
def my_ellipse(img, angle):
thickness = 2
line_type = 8
cv2.ellipse(img,
(W / 2, W / 2),
(W / 4, W / 16),
angle,
0,
360,
(255, 0, 0),
thickness,
line_type)
## [my_ellipse]
## [my_filled_circle]
def my_filled_circle(img, center):
thickness = -1
line_type = 8
cv2.circle(img,
center,
W / 32,
(0, 0, 255),
thickness,
line_type)
## [my_filled_circle]
## [my_polygon]
def my_polygon(img):
line_type = 8
# Create some points
ppt = np.array([[W / 4, 7 * W / 8], [3 * W / 4, 7 * W / 8],
[3 * W / 4, 13 * W / 16], [11 * W / 16, 13 * W / 16],
[19 * W / 32, 3 * W / 8], [3 * W / 4, 3 * W / 8],
[3 * W / 4, W / 8], [26 * W / 40, W / 8],
[26 * W / 40, W / 4], [22 * W / 40, W / 4],
[22 * W / 40, W / 8], [18 * W / 40, W / 8],
[18 * W / 40, W / 4], [14 * W / 40, W / 4],
[14 * W / 40, W / 8], [W / 4, W / 8],
[W / 4, 3 * W / 8], [13 * W / 32, 3 * W / 8],
[5 * W / 16, 13 * W / 16], [W / 4, 13 * W / 16]], np.int32)
ppt = ppt.reshape((-1, 1, 2))
cv2.fillPoly(img, [ppt], (255, 255, 255), line_type)
# Only drawind the lines would be:
# cv2.polylines(img, [ppt], True, (255, 0, 255), line_type)
## [my_polygon]
## [my_line]
def my_line(img, start, end):
thickness = 2
line_type = 8
cv2.line(img,
start,
end,
(0, 0, 0),
thickness,
line_type)
## [my_line]
## [create_images]
# Windows names
atom_window = "Drawing 1: Atom"
rook_window = "Drawing 2: Rook"
# Create black empty images
size = W, W, 3
atom_image = np.zeros(size, dtype=np.uint8)
rook_image = np.zeros(size, dtype=np.uint8)
## [create_images]
## [draw_atom]
# 1. Draw a simple atom:
# -----------------------
# 1.a. Creating ellipses
my_ellipse(atom_image, 90)
my_ellipse(atom_image, 0)
my_ellipse(atom_image, 45)
my_ellipse(atom_image, -45)
# 1.b. Creating circles
my_filled_circle(atom_image, (W / 2, W / 2))
## [draw_atom]
## [draw_rook]
# 2. Draw a rook
# ------------------
# 2.a. Create a convex polygon
my_polygon(rook_image)
## [rectangle]
# 2.b. Creating rectangles
cv2.rectangle(rook_image,
(0, 7 * W / 8),
(W, W),
(0, 255, 255),
-1,
8)
## [rectangle]
# 2.c. Create a few lines
my_line(rook_image, (0, 15 * W / 16), (W, 15 * W / 16))
my_line(rook_image, (W / 4, 7 * W / 8), (W / 4, W))
my_line(rook_image, (W / 2, 7 * W / 8), (W / 2, W))
my_line(rook_image, (3 * W / 4, 7 * W / 8), (3 * W / 4, W))
## [draw_rook]
cv2.imshow(atom_window, atom_image)
cv2.moveWindow(atom_window, 0, 200)
cv2.imshow(rook_window, rook_image)
cv2.moveWindow(rook_window, W, 200)
cv2.waitKey(0)
cv2.destroyAllWindows()
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