opencvで粗さの等高線を計算する方法はありますか?
画像サンプル:https ://docs.google.com/file/d/0ByS6Z5WRz-h2NDgySmJ6NnpId0U/edit?usp = Sharing
アップデート
粗さを計算するための私のコード:
周囲の輪郭/凸包の周囲
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]
#ROUGHNESS
perimeter = cv2.arcLength(unicocnt,True)
hull = cv2.convexHull(unicocnt,returnPoints = False)
hullperimeter = cv2.arcLength(hull,True)
print("perimeter")
print(perimeter)
print("hullperimeter")
print(hullperimeter)
roughness = perimeter/hullperimeter
print("roughness")
print(roughness)
エラー:
Traceback (most recent call last):
File "C:\Python27\nuovefeature.py", line 417, in <module>
hullperimeter = cv2.arcLength(hull,True)
error: ..\..\..\src\opencv\modules\imgproc\src\contours.cpp:1886: error: (-215) curve.checkVector(2) >= 0 && (curve.depth() == CV_32F || curve.depth() == CV_32S)