Camera calibration method and calibration device

A camera calibration method, for calibrating a camera, the camera comprising a lens and a photosensitive chip, wherein the camera calibration method comprises:

• obtaining a functional relationship between a distance of a plurality of pixel regions and a Z-axis coordinate, wherein each of the pixel regions comprises a plurality of pixels, and the Z-axis coordinate is a Z-axis coordinate of the lens relative to the photosensitive chip;
• obtaining a distance of a plurality of real-time pixel regions of an initial picture which is obtained at an initial position by the camera to be calibrated;
• generating a predicted Z-axis coordinate according to the distance of the plurality of real-time pixel regions and the functional relationship;
• and
• controlling one of the lens and the photosensitive chip to move relative to the other of the lens and the photosensitive chip from the initial position to the predicted Z-axis coordinate.