IDE: VScode
环境:python3.6
启动调试报错:
(unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape
调试代码发现是读取文件路径问题,只要在文件路径前加一个 r 即可。
#coding=utf-8
import cv2
import numpy as np
def CannyThreshold(lowThreshold):
detected_edges = cv2.GaussianBlur(gray, (3, 3), 0)
detected_edges = cv2.Canny(
detected_edges, lowThreshold, lowThreshold*ratio, apertureSize=kernel_size)
# just add some colours to edges from original image.
dst = cv2.bitwise_and(img, img, mask=detected_edges)
cv2.imshow('canny demo', dst)
lowThreshold = 0
max_lowThreshold = 100
ratio = 3
kernel_size = 3
img = cv2.imread('C:\Users\huang\Desktop\EdgeDetectionCode\1.BMP')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
cv2.namedWindow('canny demo')
cv2.createTrackbar('Min threshold', 'canny demo',
lowThreshold, max_lowThreshold, CannyThreshold)
CannyThreshold(0) # initialization
if cv2.waitKey(0) == 27:
cv2.destroyAllWindows()
#coding=utf-8
import cv2
import numpy as np
img = cv2.imread("D:/lion.jpg", 0)
img = cv2.GaussianBlur(img,(3,3),0)
canny = cv2.Canny(img, 50, 150)
cv2.imshow('Canny', canny)
cv2.waitKey(0)
cv2.destroyAllWindows()
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