!_img.empty() in function 'cv::imwrite'
时间: 2023-09-29 17:03:28 浏览: 58
This error message is related to the OpenCV library and the imwrite function used to write an image to a file. The error message indicates that the input image may be empty or not properly initialized, which means there is no image data to write to the file.
To fix this error, you can check if the image is properly initialized and contains data before passing it to the imwrite function. You can use the empty() function to check if the image is empty or not.
For example, you can use the following code to check if the image is empty before writing it to a file:
```
cv::Mat image = ... // your image data
if (!image.empty()) {
cv::imwrite("output.jpg", image);
} else {
std::cerr << "Error: Empty image" << std::endl;
}
```
This code checks if the image is empty using the empty() function and writes the image to a file if it is not empty. If the image is empty, it prints an error message to the console.