YY/T 1488-2025Traditional Chinese medical device - Tongue features acquisition device (English PDF)

3.1

Tongue images are acquired through an imaging device [digital camera or image sensor], and then stored, compared, and analyzed to achieve the desired results.

Devices that provide auxiliary diagnostic information about tongue appearance.

3.2

A light source used to provide the lighting environment required for the operation of equipment.

Note. Hereinafter referred to as "light source".

3.3 resolution

The minimum interval between two adjacent lines that can be identified.

3.4 Color reproduction

The ability of an imaging device to accurately reproduce the colors of the photographed object.

3.5 distortion

The distortion of the image pair caused by the inconsistency between the magnification in the central region and the magnification at the edges is usually manifested as absolute distortion or relative distortion.

To express.

Note. Distortion mainly refers to a series of factors including optical distortion caused by optical lenses, mechanical errors, electrical errors, and display errors of display devices.

The total distortion is represented by the radial distortion component. During imaging and display, the radial distortion component plays a major role, while the tangential distortion component and the radial distortion component...