OpenCV蟒蛇線以下代碼低FPS

Question

我嘗試了各種方法，但我仍然得到apx 2-3 fps。

import cv2 

進口numpy的爲NP

import cv2 
 
import numpy as np 
 

 
##cap = cv2.imread('C:\\Users\\efeongan\\Desktop\\PYTHOn_OPENCV\\linetest.mp4') 
 
cap = cv2.VideoCapture('C:\\Users\\efeongan\\Desktop\\PYTHOn_OPENCV\\linetest.mp4') 
 
while True: 
 
    _, frame = cap.read() 
 
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) 
 
    lowbg = np.array([0,0,0]) 
 
    highbg = np.array([50, 50, 50]) 
 
    kernel = np.ones([10, 10], np.uint8) 
 
    mask = cv2.inRange(frame, lowbg, highbg) 
 
    res = cv2.bitwise_and(gray, gray, mask = mask) 
 
    dilation = cv2.dilate(res, kernel, iterations = 1) 
 
    lines = cv2.HoughLinesP(dilation,rho=0.02,theta=np.pi/500, threshold=100,lines=np.array([]), minLineLength= 0) 
 
    a,b,c = lines.shape 
 
    if lines[1][0][0] > 240: 
 
     diff = lines[1][0][0] - 240 
 
     print(diff) 
 
    if lines[1][0][0] < 240: 
 
     diff = 220 - lines[1][0][0] 
 
     print(diff) 
 
    for i in range(a): 
 
     cv2.line(dilation, (lines[i][0][0], lines[i][0][1]), (lines[i][0][2], lines[i][0][3]), (255, 255, 255), 3, cv2.LINE_AA) 
 
    cv2.line(frame, (240, 800), (240 + diff, 800), (255,0,0),10) 
 
    cv2.putText(frame,str(diff),(240 + diff,800), cv2.FONT_HERSHEY_SIMPLEX, 1, 255) 
 
    print("x", lines[1][0][0], cnts) 
 
    cv2.imshow('raw', frame) 
 
    k = cv2.waitKey(1) 
 
    if k == 27: 
 
     brak 
 
cv2.desrtroyAllWindows()

Answer 1

會嘗試使用較低的幀分辨率。您可以嘗試較小的分辨率，並查看精度如何隨分辨率下降而下降，並找到折衷方案。

另一種可能性是僅處理每個幀的選定區域。假設您在圖像的一個區域中找到該行。您可以假定下一幀中線的位置沒有太大變化，並且只處理該線周圍的區域。