Question

我运行此程序并返回此错误消息：

错误：（ - 1515）size.width＆gt; 0＆amp;＆amp;函数imshow中的size.height＆gt; 0

我该如何解决？这是源代码：

import numpy as np
import cv2

cap = cv2.VideoCapture(0)

ret,frame = cap.read()


r,h,c,w = 250,90,400,125
track_window = (c,r,w,h)

roi = frame[r:r+h, c:c+w]
hsv_roi =  cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
mask = cv2.inRange(hsv_roi, np.array((0., 60.,32.)), np.array((180.,255.,255.)))
roi_hist = cv2.calcHist([hsv_roi],[0],mask,[180],[0,180])
cv2.normalize(roi_hist,roi_hist,0,255,cv2.NORM_MINMAX)

term_crit = ( cv2.TERM_CRITERIA_EPS | cv2.TERM_CRITERIA_COUNT, 10, 1 )

while(1):
    ret ,frame = cap.read()
    if ret == True:
        hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
        dst = cv2.calcBackProject([hsv],[0],roi_hist,[0,180],1)

        ret, track_window = cv2.meanShift(dst, track_window, term_crit)

        x,y,w,h = track_window
        img2 = cv2.rectangle(frame, (x,y), (x+w,y+h), 255,2)


        cv2.imshow('Rilevamento',img2)

        k = cv2.waitKey(60) & 0xff
        if k == 27:
            break
        else:
            cv2.imwrite(chr(k)+".jpg",img2)

    else:
        break

cv2.destroyAllWindows()
cap.release()

Answer 1

根据opencv documentation cv2.rectangle在参数中为您提供的图像上绘制一个矩形，它不会返回任何内容。

然后你只需要改变这一行：

cv2.imshow('Rilevamento',img2)

到

cv2.imshow('Rilevamento', frame)

希望它有所帮助。

Python OpenCV错误：（ - 1515）size.width＆gt; 0＆amp;＆amp;函数imshow中的size.height＆gt; 0

1 个答案: