Determining shape and dimensions required for perspectively-distorted two=dimensional advertising strip e.g. on football pitch by measuring angles between observation point and source object

摘要

The method involves measuring the horizontal and vertical angles (alpha, beta) between the observation point (K) and the source object (2). The lengths of the sides of the perspectively-distorted frame defining the border of the perspectively-distorted image (2) are calculated from these angles based on the measurements of width (a) and height (h) of the source item, which is typically an upright advertising strip. An advertisement laid on the ground is also included.