face_recognition
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ageitgey
cv2.error: OpenCV(4.1.0) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
- face_recognition version:4.1.0
- Python version:3.7
- Operating System:windows 10
Description
I'm having problem to run this program, the error under below
gray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY) cv2.error: OpenCV(4.1.0) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
What I Did
Paste the command(s) you ran and the output.
If there was a crash, please include the traceback here.
This a secondary error that basically just means the image you are trying to process didn't load and was empty.
If you grabbed the image dara from the camera, it means the camera connection failed or isn't configured correctly. If you loaded an image file, it means the loading failed.
I was facing this issue and by removing special characters from the image_file_name the issue was resolved.
Example: Renaming "48172454-thymianblätter.jpg" to "48172454-thymian.jpg".
I am using hik vision's camera and i am getting same error...i think my laptop's processor is not able to load the frames due to very high resolution and frame rate
I have same problem. My old code is : cap = cv2.VideoCapture(1)
Then I change my code, and problem has solved. Probably, opencv accepts my finger print input as a camera. Thus, I change VideoCapture parameter as follows: cap = cv2.VideoCapture(0)
how to solve this error. anyone has answer for this error: OpenCV(4.1.0) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
this problem occcurs when you dont declare what 'im' is or the image has not been loaded to the variable 'im'/.
if you're using your webcam to capture then use
cap = cv2.VideoCapture(-1) on linux
cap = cv2.VideoCapture(0) on windows
and 'im' must be ret, im = cap.read().
So it will read the image properly.
if you do follow these steps the error must not occur.
Now I guess we can close this issue. @ageitgey @rezabrg @rafaelpsimoes
@rezabrg download the required haarcascades it will work https://github.com/opencv/opencv/tree/master/data/haarcascades
In my case, I found that in the settings of windows 10, permission to access camera has been disabled to any applications
I am using hik vision's camera and i am getting same error...i think my laptop's processor is not able to load the frames due to very high resolution and frame rate
Did you find a solution?
cv2.error: OpenCV(4.2.0) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor' how to solve this
gray = cv2.cvtColor(image_frame, cv2.COLOR_BGR2GRAY)
error: OpenCV(4.2.0) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
mn biết lỗi này là sao k ạ
I realized I wasn't in the same dir as the image.I was trying to load an image from Desktop using just the image name.jpg. I changed dir into Desktop and everything worked fine.
I have the same problem the reason was the image name in the folder was different from the one i was calling from cv2.imread function. properly load the images. hope it helps
If you use a camera:
cv2.VideoCapture(0) #win
cv2.VideoCapture(-1) #linux
If you play local video:
cv2.VideoCapture("videoFilePath")
Same error
Traceback (most recent call last):
File "basic/imageread.py", line 5, in
complete image path helps me to resolve error example : cv2.imread("C:\Users\xyz\Desktop\Python\welcome.png")
ret, frame = cv2.VideoCapture('PATH').read() You should put : ''' if ret == False break ''' above: ''' gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) cv2.imshow('gray', gray) ''' Because when it comes to the final frame of the video, then there will be no frame for ''' cv2.cvtCOLOR(frame, cv2.COLOR_BGR2GRAY) '''' _src.empty() in function 'cv::cvtColor' means that is no source for the function.
cv2.error: OpenCV(4.2.0) /io/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cvtColor'
Same here, the suggestions under this topic didnt work for me.
gray = cv2.cvtColor(image_frame, cv2.COLOR_BGR2GRAY)
error: OpenCV(4.2.0) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
mn biết lỗi này là sao k ạ
chuyển \ thành / thử xem bạn
cv2.error: OpenCV(4.2.0) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor' how to solve this
How to solve?
error: OpenCV(4.2.0) C:\projects\opencv-python\opencv\modules\objdetect\src\cascadedetect.cpp:1689: error: (-215:Assertion failed) !empty() in function 'cv::CascadeClassifier::detectMultiScale'
Please help!
The problem is your image location. Just check carefully if you make a mistake on the location. For example if your image stored under a folder and rather in the same folder of your source code then dont use color = cv2.imread("butterfly.jpg", 1 ) instead color = cv2.imread("images/your-folder/butterfly.jpg", 1 )
I also faced the same error and i fixed it by correcting the directory path. Earlier my code was cv2.imread("basic/imageread.png",1)
i fixed it by changing the path,make sure your path is correct. cv2.imread("../basic/imageread.png",1)
IDE: Pycharm OS: Ubuntu:18
If the path is correct and the name of the image is OK, but you are still getting the error
use:
from skimage import io
img = io.imread(file_path)
instead of:
cv2.imread(file_path)
The function imread loads an image from the specified file and returns it. If the image cannot be read (because of missing file, improper permissions, unsupported or invalid format), the function returns an empty matrix ( Mat::data==NULL ).
See this stackoverflow for more information.
