Multispectral imaging color measurement system and method for processing imaging signals thereof

摘要

A multispectral imaging color measurement system, comprising a dark room, a sample platform and an imaging device for capturing said object being measured; a controllable illumination device, a filter wheel unit, an imaging signal processing unit and an electronic control unit. A method for processing imaging signals of the multispectral imaging color measurement is also proposed. The multispectral imaging color measurement system and the method for processing imaging signals thereof can overcome the inaccuracy of traditional digital imaging systems and the limits of spectrophotometer systems and provide users in the textile industry with highly accurate color measurement and evaluation.

主权项

1. A multispectral imaging color measurement system comprising a dark room of a confined space for multispectral imaging, a sample platform located in said dark room for laying and fastening an object being measured, an imaging device for capturing said object being measured, a controllable illumination device, a filter wheel unit, an imaging signal processing unit and an electronic control unit;
said controllable illumination device being located in the dark room comprising at least two lighting tubes arranged symmetrically above the object while pointing towards the object; said filter wheel unit being located between said imaging device and said object for filtering light emitted from said controllable illumination device and reflected by said object; said imaging signal processing unit is located within said imaging device for calibrating and reconstructing reflectance of images captured by said imaging device; said electronic control unit, having communication connections with said controllable illumination device, said filter wheel unit and said imaging device, is for controlling said controllable illumination device, said filter wheel unit and said imaging device when in operation; wherein said lighting tube comprises one or more light sources that are connected sequentially, one or more optical integrated columns for collecting maximal uniform light, a series of lenses for improving lighting uniformity and magnification, a photo-resistant plate for reducing diffused light, and wherein internal part of said lighting tube is coated with light-absorbing material for reducing internal diffused light; said one or more light sources is selected from a halogen tungsten lamp with a smooth curve of spectral energy distribution and powered by two high-precision DC power supply; said one or more optical integrated columns have hollow horn-like structures surrounded by a glass wall; said series of lenses comprises optical grating for limiting light beam edges and one or more convex lenses and concave lenses having different refractive indexes; and said photo-resistant plate is located on the front edge of said series of lenses.