TypeError: unsupported operand type(s) for -: 'tuple' and 'int'

[spriya]

Traceback (most recent call last):
File "main.py", line 55, in <module>
res=names[recognizer.pred ict(gray[y:y+h, x:x+w])-1]
TypeError: unsupported operand type(s) for -: 'tuple' and 'int'


This is my error . and the code is

import cv2
import numpy as np
import os
import serial
ser = serial.Serial('/dev/ttyACM0', 9600, timeout=1)
cascadePath = "haarcascade_fr ontalface_defau lt.xml"
faceCascade = cv2.CascadeClas sifier(cascadeP ath)
recognizer=cv2. face.createLBPH FaceRecognizer( )
#Loading each image and cropping the face preparing the dataset
# for filename in os.listdir('Dat aset'):
# im=cv2.imread(' Dataset/'+filename,0)
# print filename
# faces = faceCascade.det ectMultiScale(i m, 1.3, 5)
# for (x,y,w,h) in faces:
# cv2.imwrite('Da taset/'+filename,im[y:y+h, x:x+w])

images=[]
labels=[]
for filename in os.listdir('Dat aset'):
im=cv2.imread(' Dataset/'+filename,0)
images.append(i m)
labels.append(i nt(filename.spl it('.')[0][0]))
#print filename
names_file=open ('labels.txt')
names=names_fil e.read().split( '\n')
recognizer.trai n(images,np.arr ay(labels))
print 'Training Done . . . '
font = cv2.FONT_HERSHE Y_SIMPLEX
cap=cv2.VideoCa pture(1)
lastRes=''
count=0
while(1):
_,frame=cap.rea d()
gray=cv2.cvtCol or(frame,cv2.CO LOR_BGR2GRAY)
faces = faceCascade.det ectMultiScale(g ray, 1.3, 5)
count+=1
for (x,y,w,h) in faces:
cv2.rectangle(f rame,(x,y),(x+w ,y+h),(255,0,0) ,2)
if count>20:
res=names[recognizer.pred ict(gray[y:y+h, x:x+w])-1]
if res!=lastRes :
lastRes=res
print lastRes
ser.write(lastR es)
count=0
break


cv2.imshow('fra me',frame)
k = 0xFF & cv2.waitKey(10)
if k == 27:
break
cap.release()
ser.close()
cv2.destroyAllW indows()

[dwblas]

The error message should be self explanatory. You are trying to do arithmetic on a tuple and an integer (you can only do arithmetic on types that are the same as a string + is different from an integer +). You will have to go through these calcs one at a time to see where the error is

gray[y:y+h, x:x+w])-1]