Calibration method, electronic device, and storage medium

An electronic device, comprising:

• a processor;
• a bus;
• and
• a storage configured to store machine-readable instructions to be executed by the processor, wherein when the electronic device is running, the processor communicates with the storage through the bus, and the processor executes the machine-readable instructions to:
• acquire a sample image with an image acquisition device;
• determine, based on the sample image, initial pixel coordinates of a plurality of sample reference objects in the sample image in an image coordinate system;
• perform straight-line fitting, based on the determined initial pixel coordinates of the sample reference objects in the image coordinate system, on sample reference objects on a same straight line, and correct, based on fitted straight lines, the initial pixel coordinates of the sample reference objects involved in straight-line fitting, to obtain corrected pixel coordinates;
• and
• determine, based on world coordinates of the plurality of sample reference objects in the sample image in a world coordinate system and the obtained corrected pixel coordinates, a homography matrix of the image acquisition device.

A non-transitory computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to:

• acquire a sample image with an image acquisition device;
• determine, based on the sample image, initial pixel coordinates of a plurality of sample reference objects in the sample image in an image coordinate system;
• perform straight-line fitting, based on the determined initial pixel coordinates of the sample reference objects in the image coordinate system, on sample reference objects on a same straight line, and correct, based on fitted straight lines, the initial pixel coordinates of the sample reference objects involved in straight-line fitting, to obtain corrected pixel coordinates;
• and
• determine, based on world coordinates of the plurality of sample reference objects in the sample image in a world coordinate system and the obtained corrected pixel coordinates, a homography matrix of the image acquisition device.