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我目前正在學習如何使用Open CV for python,並且我正在嘗試編寫一個程序,以從基於hsv值範圍的網絡攝像頭實時查看圖像。當我運行該程序時,我能夠使網絡攝像頭正常工作(它按預期顯示黑屏),但由於某種原因沒有顯示調整hsv範圍的軌道條。任何人都有解決方案?謝謝。爲什麼此Python Open CV程序中的軌跡條不顯示?
import cv2
import numpy as np
cap = cv2.VideoCapture(0)
def nothing(x):
pass
#creates three trackbars for color change
cv2.createTrackbar('H','frame',0,255,nothing)
cv2.createTrackbar('S','frame',0,255,nothing)
cv2.createTrackbar('V','frame',0,255,nothing)
while(1):
# Capture frame-by-frame
_, frame = cap.read()
#creates trackbars
h = cv2.getTrackbarPos('H','frame')
s = cv2.getTrackbarPos('S','frame')
v = cv2.getTrackbarPos('V','frame')
# Converts from BGR to HSV
hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
# define color strenght parameters in HSV
weaker = np.array([h+10, s+10, v+10])
stronger = np.array([h-10,s-10,v-10])
# Threshold the HSV image to obtain input color
mask = cv2.inRange(hsv, weaker, stronger)
#displays mask
cv2.imshow('Result',mask)
#terminates program
if cv2.waitKey(1) == ord('q'):
break
cv2.waitKey(0)
cv2.destroyAllWindows()