How to resolve the error when resizing in Python using cv2?

When using the cv2.resize function, you may encounter the following issues and their solutions:

1. Error message: cv2.error: OpenCV(4.5.1) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-1d5zmri6\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:Assertion failed) !ssize.empty() in ‘cv::resize’ function.

Solution: This error usually occurs due to the input image dimensions being empty. This issue can be resolved by verifying that the input image dimensions are correct.

1. Error message: cv2.error: OpenCV(4.5.1) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-1d5zmri6\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:Assertion failed) dsize.area() > 0 in the ‘cv::resize’ function.

Solution: This error usually occurs because the target size is empty. This issue can be resolved by checking if the target size is correct.

1. Error Message: cv2.error: OpenCV(4.5.1) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-1d5zmri6\opencv\modules\imgproc\src\resize.cpp:3929: error: (-215:Assertion failed) inv_scale_x > 0 in the function ‘cv::resize’.

Solution: This error is typically caused by an incorrect scaling ratio. The issue can be resolved by checking if the scaling ratio is correct.

In general, the issue of encountering errors with the cv2.resize function can be resolved by checking input image, target size, and scaling ratio parameters. If the issue persists, try updating or reinstalling the OpenCV library.