The SQCT software is designed for NS808 traffic sign measurement spectrophotometer, in this way we can measure traffic signs. In this mode, the predefined standard color area standards, such as: "GB 2893 safety color", "GB / T 18833 traffic control with reflective sheet", etc., and the brightness factor. In order to determine whether the sample data can meet the colorimetric requirements. (The standard color area is a polygon area made up of multiple chromaticity coordinate points). And you can define and modify standard color areas and brightness factors yourself.