cv2.error: opencv(4.5.3):-1: 錯誤: (-5:bad argument) in function 'resize'

Question

import numpy as np
import cv2
import pickle

########### PARAMETERS ##############
width = 640
height = 480
threshold = 0.65 # MINIMUM PROBABILITY TO CLASSIFY
cameraNo = 1
#####################################

#### CREATE CAMERA OBJECT
cap = cv2.VideoCapture(cameraNo)
cap.set(3,width)
cap.set(4,height)

#### LOAD THE TRAINNED MODEL
pickle_in = open("model_trained.p","rb")
model = pickle.load(pickle_in)

print(cv2.__version__)
#### PREPORCESSING FUNCTION
def preProcessing(img):
    img = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
    img = cv2.equalizeHist(img)
    img = img/255
    return img

    while True:
        success, imgOriginal = cap.read()
        img = np.asarray(imgOriginal)
        img = cv2.resize(img,(32,32))   <------ ERROR HERE
        img = preProcessing(img)
        cv2.imshow("Processsed Image",img)
        img = img.reshape(1,32,32,1)
        #### PREDICT
        classIndex = int(model.predict_classes(img))
        #print(classIndex)
    predictions = model.predict(img)
    #print(predictions)
    probVal= np.amax(predictions)
    print(classIndex,probVal)

    if probVal> threshold:
        cv2.putText(imgOriginal,str(classIndex) + "   "+str(probVal),
                    (50,50),cv2.FONT_HERSHEY_COMPLEX,
                    1,(0,0,255),1)

    cv2.imshow("Original Image",imgOriginal)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

錯誤：

文件“E:/DATA_SCIENCE/MY_WORK/test.py”，第 32 行，位於

img = cv2.resize(img,(32,32)) cv2.error: OpenCV(4.5.3):-1: error: (-5:Bad argument) in function 'resize' 過載解析失敗：

• 不支持 src 數據類型 = 17
• 參數“src”的預期 Ptr<cv::UMat>

Answer 1

將 cameraNo 設置為 0 。 這通常是因為您的筆記本電腦或 PC 的默認網絡攝像頭的攝像頭編號為 0。

Answer 2

您應該在 while 循環之外釋放下面代碼的“cap”端。

     if probVal> threshold:
        cv2.putText(imgOriginal,str(classIndex) + "   "+str(probVal),
                    (50,50),cv2.FONT_HERSHEY_COMPLEX,
                    1,(0,0,255),1)

    cv2.imshow("Original Image",imgOriginal)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()