为什么OpenCV SimpleBlobDetector无法检测到此图像中的斑点？
提问于 2019-01-28 17:19:35
我正在尝试检测图像中的斑点，如下所示：
尽管如此，还是没有检测到斑点。我检查了一些测试图像，下面的代码运行良好。我也尝试了调整参数，但没有任何成功。你知道我做错了什么吗？
这是我使用的代码：
procpred = cv2.bitwise_not(procpred)
blur = cv2.blur(procpred, (15,15), 0)
params = cv2.SimpleBlobDetector_Params()
# Change thresholds
params.minThreshold = 10
params.maxThreshold = 200
# Filter by Area.
params.filterByArea = False
params.minArea = 10
# Filter by Circularity
params.filterByCircularity = False
params.minCircularity = 0.1
# Filter by Convexity
params.filterByConvexity = False
params.minConvexity = 0.87
# Filter by Inertia
params.filterByInertia = False
params.minInertiaRatio = 0.01
# 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(blur)
print(keypoints)
#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(procpred, keypoints, np.array([]), (0,0,255), cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
plt.imshow(im_with_keypoints)
回答 1
Stack Overflow用户
回答已采纳
发布于 2019-01-28 20:58:13
不知道你在代码开始时做了什么，但我这样做了，它似乎工作得很好：
#!/usr/bin/env python3
import cv2
import numpy as np
# Read image
im = cv2.imread("blobs.png", cv2.IMREAD_GRAYSCALE)
params = cv2.SimpleBlobDetector_Params()
# Change thresholds
params.minThreshold = 10
params.maxThreshold = 200
# Filter by Area.
params.filterByArea = False
params.minArea = 10
# Filter by Circularity
params.filterByCircularity = False
params.minCircularity = 0.1
# Filter by Convexity
params.filterByConvexity = False
params.minConvexity = 0.87
# Filter by Inertia
params.filterByInertia = False
params.minInertiaRatio = 0.01
# 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)
print(keypoints)
im_with_keypoints = cv2.drawKeypoints(im, keypoints, np.array([]), (0,0,255), cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
cv2.imwrite("result.png",im_with_keypoints)
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原文链接：
https://stackoverflow.com/questions/54407187
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