We Are Going To Discuss About What is the reason for this error? (-215:Assertion failed) !_src.empty() in function ‘cvtColor’ . So lets Start this Python Article.
What is the reason for this error? (-215:Assertion failed) !_src.empty() in function ‘cvtColor’
- How to solve What is the reason for this error? (-215:Assertion failed) !_src.empty() in function 'cvtColor' [duplicate]
You get the error when you are attempting to use the
cv2.cvtColor()method on an empty image. Observe:>>> import cv2 >>> import numpy as np >>> img = np.uint8([]) >>> img array([], dtype=uint8) >>> cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) Traceback (most recent call last): File "<stdin>", line 1, in <module> cv2.error: OpenCV(4.5.1) /tmp/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor' >>>
The likely cause of empty images in your code is that you used thecv2.imread()method on a path that doesn't exist. Make sure that your paths are correctly defined, and one way to do this is to use theos.path.exists()method:>>> import os >>> path = "Folder/images/1.png" >>> if os.path.exists(path): ... img = cv2.imread(path) ... else: ... print("Path does not exist:", path) ... >>> - What is the reason for this error? (-215:Assertion failed) !_src.empty() in function 'cvtColor' [duplicate]
You get the error when you are attempting to use the
cv2.cvtColor()method on an empty image. Observe:>>> import cv2 >>> import numpy as np >>> img = np.uint8([]) >>> img array([], dtype=uint8) >>> cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) Traceback (most recent call last): File "<stdin>", line 1, in <module> cv2.error: OpenCV(4.5.1) /tmp/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor' >>>
The likely cause of empty images in your code is that you used thecv2.imread()method on a path that doesn't exist. Make sure that your paths are correctly defined, and one way to do this is to use theos.path.exists()method:>>> import os >>> path = "Folder/images/1.png" >>> if os.path.exists(path): ... img = cv2.imread(path) ... else: ... print("Path does not exist:", path) ... >>>
Solution 1
You get the error when you are attempting to use the cv2.cvtColor() method on an empty image. Observe:
>>> import cv2
>>> import numpy as np
>>> img = np.uint8([])
>>> img
array([], dtype=uint8)
>>> cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
cv2.error: OpenCV(4.5.1) /tmp/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'
>>>
The likely cause of empty images in your code is that you used the cv2.imread() method on a path that doesn’t exist. Make sure that your paths are correctly defined, and one way to do this is to use the os.path.exists() method:
>>> import os
>>> path = "Folder/images/1.png"
>>> if os.path.exists(path):
... img = cv2.imread(path)
... else:
... print("Path does not exist:", path)
...
>>>
Original Author Ann Zen Of This Content
Solution 2
- This error occurs when function works on a null input, probably because the input wasn’t inputted properly. Try printing the image and check if it is not a null value.
- In the load data function where you are calling the
crop_brain_contourfunction make sure you are passing the directory of the image correctly. - Try modifying your code to even include the extension of the image and make sure to enter the correct directory. Try changing your code to:
image = cv2.imread(directory + '/' + filename + 'extension_of_the_image')
Original Author Karthik Sanka Of This Content
Conclusion
So This is all About This Tutorial. Hope This Tutorial Helped You. Thank You.
