Calibration template and template detection method, device and terminal

Abstract

The invention discloses a calibration template and a template detection method, device and terminal. The calibration template comprises at least one calibration circle set and at least three positioning circle sets. The circle centers of the positioning circle sets are not located on the same straight line. Each calibration circle set comprises at least two calibration circles with the same circle center, a circular ring is formed by the calibration circles in each calibration circle set, and the colors of the circular rings are different from the colors of adjacent areas. Each positioning circle set comprises at least two positioning circles with the same circle centers, a circular ring is formed by the positioning circles in each positioning circle set, and the colors of the circular rings are different from the colors of adjacent areas. Each positioning circle set comprises a first characteristic ring and a second characteristic ring, wherein the radius of the first characteristic ring is not equal to that of any positioning ring in the positioning ring sets, and the radius of the second characteristic ring is not equal to that of any calibration ring in each calibration ring set. The calibration template is not prone to interference of the external environment, and the template detection accuracy is improved.

Description

technical field [0001] The present disclosure relates to the technical field of visual measurement, and in particular to a calibration template, a template detection method, a device, and a terminal. Background technique [0002] Shooting devices such as cameras and video cameras can record instantaneous images, and are widely used in daily life and work. In order to understand the performance of the camera, it is necessary to obtain the parameters of the camera, and the process of solving the parameters of the camera is called calibration. [0003] In the traditional technology, calibration usually adopts a two-dimensional plane calibration method, which includes the following steps: first, select a calibration template, the calibration template is a two-dimensional plane with a fixed pattern pattern, and the calibration module contains calibration points ; Then, use the photographing device to take pictures of the calibration template from different positions and angles, ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a calibration template, a template detection method, a device, and a terminal to solve the problem in the traditional technology that the detection accuracy of the template is low and affects the calibration accuracy when performing template detection on the checkerboard calibration board

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