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python: 'cv2.' -> 'cv.' via 'import cv2 as cv'

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Alexander Alekhin
2017-12-11 12:55:03 +03:00
parent 9665dde678
commit 5560db73bf
162 changed files with 2083 additions and 2084 deletions
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samples/python/kalman.py
+12 -12
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@@ -18,7 +18,7 @@ PY3 = sys.version_info[0] == 3
if PY3:
long = int
import cv2
import cv2 as cv
from math import cos, sin, sqrt
import numpy as np
@@ -26,11 +26,11 @@ if __name__ == "__main__":
img_height = 500
img_width = 500
kalman = cv2.KalmanFilter(2, 1, 0)
kalman = cv.KalmanFilter(2, 1, 0)
code = long(-1)
cv2.namedWindow("Kalman")
cv.namedWindow("Kalman")
while True:
state = 0.1 * np.random.randn(2, 1)
@@ -64,33 +64,33 @@ if __name__ == "__main__":
# plot points
def draw_cross(center, color, d):
cv2.line(img,
cv.line(img,
(center[0] - d, center[1] - d), (center[0] + d, center[1] + d),
color, 1, cv2.LINE_AA, 0)
cv2.line(img,
color, 1, cv.LINE_AA, 0)
cv.line(img,
(center[0] + d, center[1] - d), (center[0] - d, center[1] + d),
color, 1, cv2.LINE_AA, 0)
color, 1, cv.LINE_AA, 0)
img = np.zeros((img_height, img_width, 3), np.uint8)
draw_cross(np.int32(state_pt), (255, 255, 255), 3)
draw_cross(np.int32(measurement_pt), (0, 0, 255), 3)
draw_cross(np.int32(predict_pt), (0, 255, 0), 3)
cv2.line(img, state_pt, measurement_pt, (0, 0, 255), 3, cv2.LINE_AA, 0)
cv2.line(img, state_pt, predict_pt, (0, 255, 255), 3, cv2.LINE_AA, 0)
cv.line(img, state_pt, measurement_pt, (0, 0, 255), 3, cv.LINE_AA, 0)
cv.line(img, state_pt, predict_pt, (0, 255, 255), 3, cv.LINE_AA, 0)
kalman.correct(measurement)
process_noise = sqrt(kalman.processNoiseCov[0,0]) * np.random.randn(2, 1)
state = np.dot(kalman.transitionMatrix, state) + process_noise
cv2.imshow("Kalman", img)
cv.imshow("Kalman", img)
code = cv2.waitKey(100)
code = cv.waitKey(100)
if code != -1:
break
if code in [27, ord('q'), ord('Q')]:
break
cv2.destroyWindow("Kalman")
cv.destroyWindow("Kalman")