1, central symmetry measurement method: central symmetry means that objects or figures can be symmetrical through a central point. The method of measuring the symmetry of the center can be by comparing whether the shapes, sizes and positions of objects or figures on both sides of the center point are similar.

2. Axisymmetric measurement method: Axisymmetric means that an object or figure can pass through an axisymmetric. The method of measuring axial symmetry can be by comparing whether the shapes, sizes and positions of objects or figures on both sides of the axis are similar. Common measuring tools include straightedge and protractor.

3. Coordinate measurement method: by establishing a coordinate system, the symmetry of an object or figure is transformed into the symmetry in the coordinate system, so that the symmetry can be judged by calculating the lattice or vector in the coordinate system.

4. Interferometry: the interference fringes of reference waves are generated by an interferometer, and then the object or figure to be measured is placed in the interferometer, and the symmetry is measured by comparing the changes of the interference fringes.

5. Optical measurement method: use optical instruments such as optical microscope or telescope to enlarge and project the object or figure to be measured on the screen, and then observe whether the image on the screen is symmetrical.

6. Electronic measurement method: the surface of the measured object or figure is amplified and converted into electronic signals by using electronic instruments such as electron microscope or scanning electron microscope, and then these signals are processed and analyzed by computer to judge symmetry.

Application scenario of symmetry measurement method;

1. Biomedical field: Symmetry measurement can be used to evaluate the structure and function of human organs, which is of guiding significance for the diagnosis and treatment of diseases.

2. Computer vision field: Symmetry measurement can be used for image recognition, target detection and image synthesis.

3. Architectural design: The symmetry of architecture is very important for its beauty and stability. Designers can evaluate the symmetry of buildings through symmetry measurement to ensure that they achieve the expected results.

4. Mechanical manufacturing: In the field of mechanical manufacturing, symmetry measurement is widely used to evaluate the processing quality and shape accuracy of parts. Only when the symmetry meets the requirements can the parts work normally and maintain long-term stability.

5. Earth science: In the field of earth science, symmetry measurement can be used to study the shape and structure of the earth's surface, such as mountains, rivers and craters. Through symmetry measurement, scientists can better understand the formation and evolution of the earth.

6. Culture and art: Symmetry measurement also has certain applications in the field of culture and art, such as evaluating the symmetry of artworks, sculptures and patterns. This helps artists to express their creative intentions and aesthetic concepts.