def draw_ellipse(image, center, axes, angle, start_angle=0.0, end_angle=360.0, color=(255,0,0), thickness=1): center = cv.cvPoint(rnd(center[0]), rnd(center[1])) axes = cv.cvSize(rnd(axes[0]), rnd(axes[1])) color = cv.CV_RGB(color[0], color[1], color[2]) cv.cvEllipse(image, center, axes, angle, start_angle, end_angle, color, thickness)
def draw_ellipse(image,
center,
axes,
angle,
start_angle=0.0,
end_angle=360.0,
color=(255, 0, 0),
thickness=1):
center = cv.cvPoint(rnd(center[0]), rnd(center[1]))
axes = cv.cvSize(rnd(axes[0]), rnd(axes[1]))
color = cv.CV_RGB(color[0], color[1], color[2])
cv.cvEllipse(image, center, axes, angle, start_angle, end_angle, color,
thickness)
def process_image(slider_pos):
"""
Define trackbar callback functon. This function find contours,
draw it and approximate it by ellipses.
"""
stor = cv.cvCreateMemStorage(0)
# Threshold the source image. This needful for cv.cvFindContours().
cv.cvThreshold(image03, image02, slider_pos, 255, cv.CV_THRESH_BINARY)
# Find all contours.
nb_contours, cont = cv.cvFindContours(image02, stor, cv.sizeof_CvContour,
cv.CV_RETR_LIST,
cv.CV_CHAIN_APPROX_NONE,
cv.cvPoint(0, 0))
# Clear images. IPL use.
cv.cvZero(image02)
cv.cvZero(image04)
# This cycle draw all contours and approximate it by ellipses.
for c in cont.hrange():
count = c.total
# This is number point in contour
# Number point must be more than or equal to 6 (for cv.cvFitEllipse_32f).
if (count < 6):
continue
# Alloc memory for contour point set.
PointArray = cv.cvCreateMat(1, count, cv.CV_32SC2)
PointArray2D32f = cv.cvCreateMat(1, count, cv.CV_32FC2)
# Get contour point set.
cv.cvCvtSeqToArray(c, PointArray,
cv.cvSlice(0, cv.CV_WHOLE_SEQ_END_INDEX))
# Convert CvPoint set to CvBox2D32f set.
cv.cvConvert(PointArray, PointArray2D32f)
box = cv.CvBox2D()
# Fits ellipse to current contour.
box = cv.cvFitEllipse2(PointArray2D32f)
# Draw current contour.
cv.cvDrawContours(image04, c, cv.CV_RGB(255, 255, 255),
cv.CV_RGB(255, 255, 255), 0, 1, 8, cv.cvPoint(0, 0))
# Convert ellipse data from float to integer representation.
center = cv.CvPoint()
size = cv.CvSize()
center.x = cv.cvRound(box.center.x)
center.y = cv.cvRound(box.center.y)
size.width = cv.cvRound(box.size.width * 0.5)
size.height = cv.cvRound(box.size.height * 0.5)
box.angle = -box.angle
# Draw ellipse.
cv.cvEllipse(image04, center, size, box.angle, 0, 360,
cv.CV_RGB(0, 0, 255), 1, cv.CV_AA, 0)
# Show image. HighGUI use.
highgui.cvShowImage("Result", image04)
if __name__ == '__main__':
# create the image where we want to display results
image = cv.cvCreateImage (cv.cvSize (_SIZE, _SIZE), 8, 1)
# start with an empty image
cv.cvSetZero (image)
# draw the original picture
for i in range (6):
dx = (i % 2) * 250 - 30
dy = (i / 2) * 150
cv.cvEllipse (image,
cv.cvPoint (dx + 150, dy + 100),
cv.cvSize (100, 70),
0, 0, 360, _white, -1, 8, 0)
cv.cvEllipse (image,
cv.cvPoint (dx + 115, dy + 70),
cv.cvSize (30, 20),
0, 0, 360, _black, -1, 8, 0)
cv.cvEllipse (image,
cv.cvPoint (dx + 185, dy + 70),
cv.cvSize (30, 20),
0, 0, 360, _black, -1, 8, 0)
cv.cvEllipse (image,
cv.cvPoint (dx + 115, dy + 70),
cv.cvSize (15, 15),
0, 0, 360, _white, -1, 8, 0)
cv.cvEllipse (image,
cv.cvPoint (dx + 185, dy + 70),
random_color (random),
random.randrange (-1, 9),
line_type, 0)
highgui.cvShowImage (window_name, image)
highgui.cvWaitKey (delay)
# draw some ellipes
for i in range (number):
pt1 = cv.cvPoint (random.randrange (-width, 2 * width),
random.randrange (-height, 2 * height))
sz = cv.cvSize (random.randrange (0, 200),
random.randrange (0, 200))
angle = random.randrange (0, 1000) * 0.180
cv.cvEllipse (image, pt1, sz, angle, angle - 100, angle + 200,
random_color (random),
random.randrange (-1, 9),
line_type, 0)
highgui.cvShowImage (window_name, image)
highgui.cvWaitKey (delay)
# init the list of polylines
nb_polylines = 2
polylines_size = 3
pt = [0,] * nb_polylines
for a in range (nb_polylines):
pt [a] = [0,] * polylines_size
# draw some polylines
for i in range (number):
for a in range (nb_polylines):
if __name__ == '__main__':
# create the image where we want to display results
image = cv.cvCreateImage(cv.cvSize(_SIZE, _SIZE), 8, 1)
# start with an empty image
cv.cvSetZero(image)
# draw the original picture
for i in range(6):
dx = (i % 2) * 250 - 30
dy = (i / 2) * 150
cv.cvEllipse(image, cv.cvPoint(dx + 150, dy + 100), cv.cvSize(100, 70),
0, 0, 360, _white, -1, 8, 0)
cv.cvEllipse(image, cv.cvPoint(dx + 115, dy + 70), cv.cvSize(30, 20),
0, 0, 360, _black, -1, 8, 0)
cv.cvEllipse(image, cv.cvPoint(dx + 185, dy + 70), cv.cvSize(30, 20),
0, 0, 360, _black, -1, 8, 0)
cv.cvEllipse(image, cv.cvPoint(dx + 115, dy + 70), cv.cvSize(15, 15),
0, 0, 360, _white, -1, 8, 0)
cv.cvEllipse(image, cv.cvPoint(dx + 185, dy + 70), cv.cvSize(15, 15),
0, 0, 360, _white, -1, 8, 0)
cv.cvEllipse(image, cv.cvPoint(dx + 115, dy + 70), cv.cvSize(5, 5), 0,
0, 360, _black, -1, 8, 0)
cv.cvEllipse(image, cv.cvPoint(dx + 185, dy + 70), cv.cvSize(5, 5), 0,
0, 360, _black, -1, 8, 0)
cv.cvEllipse(image, cv.cvPoint(dx + 150, dy + 100), cv.cvSize(10, 5),
0, 0, 360, _black, -1, 8, 0)
cv.cvEllipse(image, cv.cvPoint(dx + 150, dy + 150), cv.cvSize(40, 10),
def process_image( slider_pos ):
"""
Define trackbar callback functon. This function find contours,
draw it and approximate it by ellipses.
"""
stor = cv.cvCreateMemStorage(0);
# Threshold the source image. This needful for cv.cvFindContours().
cv.cvThreshold( image03, image02, slider_pos, 255, cv.CV_THRESH_BINARY );
# Find all contours.
nb_contours, cont = cv.cvFindContours (image02,
stor,
cv.sizeof_CvContour,
cv.CV_RETR_LIST,
cv.CV_CHAIN_APPROX_NONE,
cv.cvPoint (0,0))
# Clear images. IPL use.
cv.cvZero(image02);
cv.cvZero(image04);
# This cycle draw all contours and approximate it by ellipses.
for c in cont.hrange():
count = c.total; # This is number point in contour
# Number point must be more than or equal to 6 (for cv.cvFitEllipse_32f).
if( count < 6 ):
continue;
# Alloc memory for contour point set.
PointArray = cv.cvCreateMat(1, count, cv.CV_32SC2)
PointArray2D32f= cv.cvCreateMat( 1, count, cv.CV_32FC2)
# Get contour point set.
cv.cvCvtSeqToArray(c, PointArray, cv.cvSlice(0, cv.CV_WHOLE_SEQ_END_INDEX));
# Convert CvPoint set to CvBox2D32f set.
cv.cvConvert( PointArray, PointArray2D32f )
box = cv.CvBox2D()
# Fits ellipse to current contour.
box = cv.cvFitEllipse2(PointArray2D32f);
# Draw current contour.
cv.cvDrawContours(image04, c, cv.CV_RGB(255,255,255), cv.CV_RGB(255,255,255),0,1,8,cv.cvPoint(0,0));
# Convert ellipse data from float to integer representation.
center = cv.CvPoint()
size = cv.CvSize()
center.x = cv.cvRound(box.center.x);
center.y = cv.cvRound(box.center.y);
size.width = cv.cvRound(box.size.width*0.5);
size.height = cv.cvRound(box.size.height*0.5);
box.angle = -box.angle;
# Draw ellipse.
cv.cvEllipse(image04, center, size,
box.angle, 0, 360,
cv.CV_RGB(0,0,255), 1, cv.CV_AA, 0);
# Show image. HighGUI use.
highgui.cvShowImage( "Result", image04 );
random_color (random),
random.randrange (-1, 9),
line_type, 0)
highgui.cvShowImage (window_name, image)
highgui.cvWaitKey (delay)
# draw some ellipes
for i in range (number):
pt1 = cv.cvPoint (random.randrange (-width, 2 * width),
random.randrange (-height, 2 * height))
sz = cv.cvSize (random.randrange (0, 200),
random.randrange (0, 200))
angle = random.randrange (0, 1000) * 0.180
cv.cvEllipse (image, pt1, sz, angle, angle - 100, angle + 200,
random_color (random),
random.randrange (-1, 9),
line_type, 0)
highgui.cvShowImage (window_name, image)
highgui.cvWaitKey (delay)
# init the list of polylines
nb_polylines = 2
polylines_size = 3
pt = [0,] * nb_polylines
for a in range (nb_polylines):
pt [a] = [0,] * polylines_size
# draw some polylines
for i in range (number):
for a in range (nb_polylines):
