Multi - Spectral Imaging Of Batik Fabrics Under Multiple Angles

With the development of society, art will always be disappear in people’s field of vision because of the passage of time gradually. Various forms of batik technique, after several thousand years of succession, demonstrates different ethnic group their own temperament and cultural connotations. So far, Batik technique has a history of 2500. However, with the development of industrial society, batik artwork inevitably suffered damage, and batik fabrics with national characteristics have become very rare. So, it is very meaningful to research how to present batik pattern again and save it. At 400~720nm wavelength range, multi-spectral imaging system based on liquid crystal tunable filter(LCTF) and CMOS camera, images at intervals of 5nm taking batik fabrics as the study object. True colors were reproduction with more angle by collecting color information for each pixel on batik cloth at specific angle.By comparing and selecting the HIS and CIE1976L*a*b*two color spaces reproduce the color image analysis after its color piece along with the change of Angle curve in different locations, color piece of different color in the same place along with the change of Angle curve. The results showed that: the curve of lightness value L and luminance values I of different colors of patches at different positions in both color space with the change of angle is relatively stable, the 900 is most stable; lightness L is affected by fabric texture and light irradiance are smaller. The curve of brightness values L and luminance I of the green, white, orange, brown, blue five different colored patching on multi-spectral image at different angles is a normal distribution. Hue and Saturation have no change with angles; chromaticity coordinates a, b have larger changes with the angles. Use Gaussian function fitting out color image of the five colors patches at multi-angles in the plane, and analysis value the CIEDE2000 color difference with the reproduced image under specific angle.The evaluation results are showed according to the analysis of representation under the particular angle of color image after color piece with the change of perspective, Color patches can be reconstructed under any angle by selecting the appropriate color space for batik fabric, This method can better reflect spectral reflectance information at the different angles, and it has an important practical value for fabric to realize true representation of colors.