Method and device for measuring visual angle of display

The invention provides a display visual angle measuring method and device, and belongs to the technical field of optical instrument measurement, and the method comprises the steps: controlling a display to display a preset calibration point at a preset position, and completing the calibration of an imaging type measuring instrument relative to the preset position according to the imaging position of the preset calibration point of the display in a first visual field image; controlling a display to display a preset calibration image, and obtaining a rectangular region from the second view image, so as to complete the calibration of the imaging type measuring instrument in the horizontal and vertical directions according to the pixel coordinates of the vertexes of the rectangular region; and determining a rotation center based on the vertical distance between the imaging type measuring instrument and the preset position of the display so as to complete the measurement of the visual angle of the display. Accordi