SimpleBlobDetector opencv python 错误但缺少输出

Question

我正在尝试使用 opencv SimpleBlobDetector。我现在的程序是这样一个简单的测试程序：

import cv2
import numpy as np;

im = cv2.imread("blobs.jpg", cv2.IMREAD_GRAYSCALE)

params = cv2.SimpleBlobDetector_Params()

params.filterByArea = True;
params.minArea = 1;
params.maxArea = 1000;

detector = cv2.SimpleBlobDetector(params)

keypoints = detector.detect(im)

im_with_keypoints = cv2.drawKeypoints(im, keypoints, np.array([]), (0,0,255), cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)

cv2.imshow("Keypoints", im_with_keypoints)
cv2.waitKey(0)

代码一直运行到它应该实际检测到斑点的关键点行。它没有显示任何错误消息，只是重新启动内核。我使用了一张非常简单的图片，所以应该检测到斑点。

used image

Answer 1

似乎对我有用。如果你正在使用 Python 3 你想使用 detector = cv2.SimpleBlobDetector_create(params) 而不是你以前的。我将最大区域增加到 10000 像素，并且还附上了输出的屏幕截图：

import cv2
import numpy as np;

im = cv2.imread("blobs.jpg", cv2.IMREAD_GRAYSCALE)

params = cv2.SimpleBlobDetector_Params()

params.filterByArea = True;
params.minArea = 1;
params.maxArea = 10000;

detector = cv2.SimpleBlobDetector_create(params)

keypoints = detector.detect(im)

im_with_keypoints = cv2.drawKeypoints(im, keypoints, np.array([]), (0,0,255), cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)

cv2.imshow("Keypoints", im_with_keypoints)
cv2.waitKey(0)

SimpleBlobDetector opencv python 错误但缺少输出

SimpleBlobDetector opencv python error but missing output

python

opencv

blob

image-processing