相关疑难解决方法(0)

我正在尝试制作一个结合Haar Cascade Classification和Lucas Kanade良好特征检测的人脸跟踪器.但是,我不断收到一个错误,我无法弄清楚它的含义以及如何解决它.

有人能帮我一下吗？

错误:

line 110, in <module>
cv2.imshow('frame',img)
error: /build/buildd/opencv-2.4.8+dfsg1/modules/highgui/src/window.cpp:269: 
error: (-215)size.width>0 && size.height>0 in function imshow

码:

from matplotlib import pyplot as plt
import numpy as np

import cv2

face_classifier = cv2.CascadeClassifier('haarcascades/haarcascade_frontalface_default.xml')


cap = cv2.VideoCapture(0)


# params for ShiTomasi corner detection
feature_params = dict( maxCorners = 200,
                       qualityLevel = 0.01,
                       minDistance = 10,
                       blockSize = 7 )

# Parameters for lucas kanade optical flow
lk_params = dict( winSize  = (15,15),
                  maxLevel = 2,
                  criteria = (cv2.TERM_CRITERIA_EPS …