Python中的手形检测器

Question

不仅仅是#cv2putText，添加print(totalFingers)你能得到这个值吗？我不想在图像中显示数字

我的代码如下。

    from cvzone.HandTrackingModule import HandDetector
import cv2
import numpy as np

cap = cv2.VideoCapture(0)
cap.set(3, 1280)
cap.set(4, 720)
detector = HandDetector(detectionCon=0.5, maxHands=1)

while True:
    # Get image frame
    success, img = cap.read()

    # Find the hand and its landmarks
    img = detector.findHands(img)
    lmList, bboxInfo = detector.findPosition(img)

    lmList =[2]
    if lmList:
        bbox = bboxInfo[0]['bbox']
        fingers = detector.fingersUp()
        totalFingers = fingers.count (1)

       # cv2.putText(img, f'Fingers:{totalFingers}', (bbox[0] + 200, bbox[1] - 30), cv2.FONT_HERSHEY_PLAIN, 2, (0, 255, 0), 2)

    # 顯示
    cv2. imshow("Image", img)
    print()
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cap.release(totalFingers)
cv2.destroyAllWindows()

bbox = bboxInfo IndexError:列表索引超出范围

Answer 1

错误：totalFingers仅定义为if lmList:。但是，看起来lmList为False/empty/None，并且您尝试使用未定义的totalFingers。

Example 1:

    lmList = [2]
    if lmList:
       totalFingers = 7
    print(totalFingers)

Example 2:
    # this is the bug 
    lmList = None
    if lmList:
       totalFingers = 7
    print(totalFingers)