Research on color matching algorithm of hyperspectral wood dyeing based on particle swarm optimizati

In this study, a 400-1000nm hyperspectral camera is used, and the product FS13 of Hangzhou CHNSpec technology Co., Ltd. can be used for related research.

Wood color is an important factor determining wood quality. Due to the scarcity of precious wood, it is derived from the simulated wood processing industry. The production line workers in the traditional wood dyeing industry only rely on experience and visual judgment to dye, resulting in the decline of dyeing quality, waste of wood resources and failure to achieve the desired dyeing effect. To solve the above problems, hyperspectral imaging technology and computer intelligent algorithm are applied to wood dyeing and color matching, so as to improve the accuracy and practicability of computer intelligent color matching application of wood dyeing.

The main contents of this study are as follows:

1)Taking Fraxinus mandshurica veneer wood as the research object, the wood dyeing test was carried out under the determined dyeing process. The precious tree species wood samples, single component dye dyed wood samples and mixed color dye dyed wood samples were obtained. The principle of hyperspectral imaging technology and several color space and color difference rating theories were expounded. Aiming at the theoretical experimental research of wood dyeing and color matching, the hyperspectral instrument is selected to process the test sample, and the hyperspectral technology is used to collect, process and analyze the experimental samples.

2)The sample set was trained according to the experimental data, and the prediction model of wood dyeing formula based on Kubelka Munk theory was established. Aiming at the problems existing in Kubelka Munk theoretical algorithm model, an optimized friere algorithm model is established to carry out experimental research on wood dyeing and color matching. At the same time, the color difference accuracy of the optimized friere algorithm model in the prediction of wood dyeing and color matching formula is compared. The hyperspectral filter is used to detect the dyeing experimental samples. According to the comparison of dyeing effects and the research of algorithm, the prediction formula of steam noechel algorithm model is optimized by particle swarm optimization, so as to improve the dyeing accuracy of friere algorithm model and reduce the color difference and spectral reflectance curve error, The color difference accuracy of steam noechel algorithm model before and after optimization in wood dyeing color matching prediction formula process was compared.

The main research results of this study are as follows:

1)The research on computer intelligent color matching method of wood dyeing based on hyperspectral imaging in spectral space is proposed. The computer technology is applied to the industrial production of wood dyeing and color matching to solve the technical problems existing in wood dyeing and color matching industry.

2)Hyperspectral imaging technology is applied to the field of color measurement. Compared with ordinary spectrophotometer, it has the advantages of "integration of spectra", wider spectral range and finer spectral characteristics. It can also solve the problem of "same color and different spectrum" caused by color camera, provide a new method for color measurement and a new idea for color measurement standard.

3)The optimization method proposed in this study improves the accuracy of the algorithm model, and then carries out spectral reflectance curve fitting combined with Hyperspectral color measurement, which makes the color matching results more accurate and more in line with the requirements of industrial production.

4)Fraxinus mandshurica dyeing was used in the experiment. The veneer was made of compact material, which was not easy to crack after coloring and drying;

5)In the process of substrate preparation, the moisture content of veneer should be maintained above 8%, the dye bath ratio should be controlled at 20:1, and the dyeing time should not exceed 3 hours; The fixation time should be controlled at about 30 minutes as far as possible. In addition, the temperature should not be too high during the drying process of Dyed Veneer, and should be controlled at about 60 ° C as far as possible.