[英]How to fix opencv/modules/objdetect/src/cascadedetect.cpp:1698: error: (-215:Assertion failed) !empty() in function 'detectMultiScale'^?
[英]opencv error cascadedetect.cpp:1639: error: (-215) !empty() in function detectMultiScale
我正在使用python进行面部识别的教程。 所以这是我正在使用的代码
import cv2,os
import numpy as np
from PIL import Image
recognizer = cv2.face.createLBPHFaceRecognizer()
detector= cv2.CascadeClassifier("haarcascade_frontalface_default.xml");
def getImagesAndLabels(path):
#get the path of all the files in the folder
imagePaths=[os.path.join(path,f) for f in os.listdir(path)]
#create empth face list
faceSamples=[]
#create empty ID list
Ids=[]
#now looping through all the image paths and loading the Ids and the images
for imagePath in imagePaths:
#loading the image and converting it to gray scale
pilImage=Image.open(imagePath).convert('L')
#Now we are converting the PIL image into numpy array
imageNp=np.array(pilImage,'uint8')
#getting the Id from the image
Id=int(os.path.split(imagePath)[-1].split(".")[1])
# extract the face from the training image sample
faces=detector.detectMultiScale(imageNp)
#If a face is there then append that in the list as well as Id of it
for (x,y,w,h) in faces:
faceSamples.append(imageNp[y:y+h,x:x+w])
Ids.append(Id)
return faceSamples,Ids
faces,Ids = getImagesAndLabels('trainingImage')
recognizer.train(faces, np.array(Ids))
recognizer.save('trainer/trainer.yml')
这是我收到的错误消息
追溯(最近一次通话最近):文件“ /home/pi/pythonpy/videofacedet/craft/codacus/trainer.py”,第32行,面孔,Ids = getImagesAndLabels('trainingImage')文件“ / home / pi / pythonpy /videofacedet/craft/codacus/trainer.py“,第24行,位于getImagesAndLabelsfaces = detector.detectMultiScale(imageNp)错误:/home/pi/opencv-3.1.0/modules/objdetect/src/cascadedetect.cpp:1639:错误:函数detectMultiScale中的(-215)!empty()
我在某处阅读说,我指向的文件夹(trainingImage)为空,但不是。 我将脸部训练图像以教程作者使用的相同文件名格式放在此处。 我希望有人能帮助我解决这个问题。
问题解决了。 我的haarcascade xml路径错误。 修复了路径,它按预期工作。
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