I've been getting this error. I have copied the code from This website and making changes so that the code actually works. The code:
ap = argparse.ArgumentParser()
ap.add_argument("-i", "--image", help="Image Path")
args = vars(ap.parse_args())
img_path = args['image']
#Reading image with opencv
img = cv2.imread(img_path)
#Reading csv file with pandas and giving names to each column
index=["color","color_name","hex","R","G","B"]
csv = pd.read_csv('colors.csv', names=index, header=None)
cv2.namedWindow('image')
cv2.setMouseCallback('image', draw_function)
while(1):
#This is error line
cv2.imshow("image",img)
[...]
The full Traceback:
Traceback (most recent call last):
File "C:\Users\someone\Documents\python\____The Useless Installer____\PY\color_detection.py", line 39, in <module>
cv2.imshow("image",img)
cv2.error: OpenCV(4.2.0) C:\projects\opencv-python\opencv\modules\highgui\src\window.cpp:376: error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow'
I've looked here and here but I don't understand how to fix this and I don't think it relates to my question that much either. If this is obvious I am very sorry. I'm a complete newbie at this. Thanks
Basically, this error tells you that you are trying to show an empty / non existent image. Please do check:
cv2.imread()
. If the path is incorrect, the img
variable will be empty .The way you tried to read the image is almost right:
img = cv2.imread(C:\Users\someone\Documents\python\____The Useless Installer____\PY\colorpic)
The way it should be :
"\"
character which has a special meaning in programming languages jpeg
, png
, etc..).'string'
or "string"
Therefore try img = cv2.imread("C:\\Users\\someone\\Documents\\python\\____The Useless Installer____\\PY\\colorpic.jpg")
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