如何知道从'查找轮廓'功能获取的轮廓是否在opencv中打开或关闭?我如何知道opencv中的轮廓是打开还是关闭?
UPDATE
我试图isContourConvex适用于这一形象:以最大的面积 https://docs.google.com/file/d/0ByS6Z5WRz-h2RXdzVGtXUTlPSGc/edit?usp=sharing
我extractes轮廓并返回false。 我改变了,也许轮廓提取,扩张?
nomeimg = 'Riscalate2/JPEG/e (5).jpg'
img = cv2.imread(nomeimg)
gray = cv2.imread(nomeimg,0)#convert grayscale adn binarize
element = cv2.getStructuringElement(cv2.MORPH_CROSS,(6,6))
graydilate = cv2.erode(gray, element) #imgbnbin
cv2.imshow('image',graydilate)
cv2.waitKey(0)
ret,thresh = cv2.threshold(graydilate,127,255,cv2.THRESH_BINARY_INV) # binarize
imgbnbin = thresh
cv2.imshow('bn',thresh)
cv2.waitKey()
#element = cv2.getStructuringElement(cv2.MORPH_CROSS,(2,2))
#element = np.ones((11,11),'uint8')
contours, hierarchy = cv2.findContours(imgbnbin, cv2.RETR_TREE ,cv2.CHAIN_APPROX_SIMPLE)
print(len(contours))
# Take only biggest contour basing on area
Areacontours = list()
calcarea = 0.0
unicocnt = 0.0
for i in range (0, len(contours)):
area = cv2.contourArea(contours[i])
#print("area")
#print(area)
if (area > 90): #con 90 trova i segni e togli puntini
if (calcarea<area):
calcarea = area
unicocnt = contours[i]
convex = cv2.isContourConvex(unicocnt)
print("convex")
print(convex)
我觉得cvcontour是基于连接的部件因此它们不能打开。 – William 2013-02-28 12:33:44
所以我永远不知道在我的图像中,我有一个像“O”或“C”的圆圈?也许是基于别的东西? – postgres 2013-02-28 12:40:28