OpenCV(4.5.4-dev) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:Assertion failed) !ssize.empty() in function 'cv::resize'

Explanation of the Error

The error message you encountered is: OpenCV(4.5.4-dev) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:Assertion failed) !ssize.empty() in function 'cv::resize'.

This error occurs when the cv::resize function in OpenCV is called with an empty image (ssize.empty() assertion failed). In other words, the image you are trying to resize is empty or not properly loaded.

Possible Causes and Solutions

There are a few possible causes for this error. Here are some steps you can take to troubleshoot and resolve the issue:

  1. Check if the image path is correct: Make sure that the image path you are providing to the cv2.imread function is correct. If the image file does not exist or the path is incorrect, the cv2.imread function will return None, resulting in an empty image. You can use the print function to check the path and verify if the image is loaded correctly [1].

  2. Verify if the image is loaded successfully: After reading the image using cv2.imread, check if the returned image is not None. If the image is None, it means that the image could not be loaded, possibly due to an incorrect path or unsupported image format. You can use an if statement to handle the case when the image is not loaded successfully.

  3. Ensure the image is not empty: Before calling the cv2.resize function, verify that the image is not empty. You can do this by checking if the image has a valid size using the !ssize.empty() assertion. If the image is empty, it means that it was not loaded correctly or there was an issue with the image file.

  4. Check for file format compatibility: OpenCV supports a wide range of image formats, but there might be cases where the image format is not supported. Ensure that the image file you are trying to load is in a compatible format, such as JPEG or PNG.

By following these steps, you should be able to identify and resolve the issue causing the !ssize.empty() assertion error in the cv::resize function.

Let me know if you need further assistance!