使用cv2.imshow时获取此黑色窗口而不是图片 [英] Getting this black window instead of picture while using cv2.imshow

问题描述

我不知道我应该为窗口使用什么术语，所以我要附上窗口的屏幕截图以供参考.

I don't know what term I should use for the window I am getting so I am attaching a screenshot of the window for reference.

我正在运行此代码的10次中大约有7次显示此窗口:

I am getting this window about 7 of the 10 times I am running this code:

import cv2
import numpy as np
import face_recognition


imgElon = face_recognition.load_image_file("BasicFaceRecImg/ElonMusk2.jpg")
imgElon = cv2.cvtColor(imgElon, cv2.COLOR_BGR2RGB)
imgElon_face_loc = face_recognition.face_locations(imgElon)[0]
print(imgElon_face_loc)

imgElon_encode = face_recognition.face_encodings(imgElon)[0]
cv2.rectangle(imgElon, (imgElon_face_loc[0], imgElon_face_loc[3]), (imgElon_face_loc[1], imgElon_face_loc[2]),(255, 0, 255), 2)
cv2.imshow('Elon Musk', imgElon)
cv2.waitKey(0)

有趣的是，我并不是每次都遇到这个问题.有时它运行完美.

And the funny thing is that I am not getting this problem every time. It runs perfectly sometimes.

推荐答案

这将有所帮助.您有时需要调整图像的大小，OpenCV会弄乱图像格式，这将在所有OpenCV版本中都适用，希望这会有所帮助

This will help. You need to resize the image sometime the OpenCV messes with an image format this will work in all OpenCV versions hope this helps

import cv2
import numpy as np
import face_recognition

# cv2.namedWindow('image', cv2.WINDOW_NORMAL)
imgElon = face_recognition.load_image_file("elon.jpg")
print(type(imgElon.shape))
a,b,c=imgElon.shape


imgElon = cv2.cvtColor(imgElon, cv2.COLOR_BGR2RGB)
imgElon_face_loc = face_recognition.face_locations(imgElon)[0]
print(imgElon_face_loc)

imgElon_encode = face_recognition.face_encodings(imgElon)[0]
cv2.rectangle(imgElon, (imgElon_face_loc[0], imgElon_face_loc[3]), (imgElon_face_loc[1], imgElon_face_loc[2]),(255, 0, 255), 2)


imgElon=cv2.resize(imgElon, (a, b))

cv2.imshow('image', imgElon)
cv2.waitKey(0)
cv2.destroyAllWindows()

这篇关于使用cv2.imshow时获取此黑色窗口而不是图片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！