python - 计算OpenCV的对象数量-Python

Question

这是我在Python(3.5.1)和OpenCV(3)中的第一个项目，因此我为自己的错误感到抱歉。
我有一些像这样的图片:
https://s12.postimg.org/ox8gw5l8d/gado.jpg

我需要计算这张图片上有多少白色物体。我尝试过使用SimpleBlobDetector，但没有按预期工作。

# Standard imports
import cv2
import numpy as np;

# Read image
im = cv2.imread("C:/opencvTests/cattle.jpg", cv2.IMREAD_GRAYSCALE)

# Setup SimpleBlobDetector parameters.
params = cv2.SimpleBlobDetector_Params()

#filter by color
params.filterByColor = True
params.blobColor = 255

# Filter by Convexity
params.filterByConvexity = True
params.minConvexity = 0.87

# Filter by Inertia
params.filterByInertia = True
params.minInertiaRatio = 0.08

# Create a detector with the parameters
ver = (cv2.__version__).split('.')
if int(ver[0]) < 3 :
   detector = cv2.SimpleBlobDetector(params)
else : 
detector = cv2.SimpleBlobDetector_create(params)

# Detect blobs.
keypoints = detector.detect(im)

# Draw detected blobs as red circles.
# cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS ensures the size of the circle        corresponds to the size of blob
im_with_keypoints = cv2.drawKeypoints(im, keypoints, np.array([]),   (0,0,255),     cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)

# Show keypoints
cv2.imwrite("C:/opencvTests/blobSave.jpg",im_with_keypoints)
print("Total of objects")
print(len(keypoints))

任何帮助将不胜感激!提前致谢

Answer 1

如果继续处理此图像，则可能会导致计数错误。执行一些预处理操作(例如形态学操作)以消除噪声，并使对象彼此分离。之后，使用“findcontours”内置的opencv函数。然后读取“findcontours”的大小，这将给出对象的数量。