采用color pilot软件处理数码照片评价牙齿的颜色变化

Tooth Color Change Evaluation with Digital Photographs by Using Color Pilot Software

目的采用color pilot和Matlab软件处理数码照片及定点计算,评价数码照片是否能察觉牙齿颜色的变化。方法采用Vita比色板A2及C1作为试件,登士柏树脂附送的A2比色板作为参照,应用同一台数码照相机拍摄数码照片。根据光源、拍摄者、光圈、拍摄时间分组。将每张数码照片采用colorpilot软件处理,进行色彩矫正。结果经过计算机校正处理,同一试件的色差值基本上在1.5以下,有少数几项在1.5～3之间。其中,使用同一光圈的色差基本上都在1.5以下,不同的试验者,不同的时间,不同的照明环境对色差的影响并不明显。不同的光圈数值对色差的影响较大。不同的试件不论在何种条件下色差值均在3以上。结论经过色彩校正的数码照片可以察觉不同物体的颜色变化。

Objective Use color pilot software to correct digital photographs,in order to evaluate if digital photographs can perceive the changes of tooth color.Methods Use A2 and C1 tabs of Vita Shade Guide as test materials,A2 tab of Spectrum composite resin Shade Guide as reference. Test pictures are taken by a digital camera（Nikon D100）,and then grouped by light conditions,operators, aperture,and the taking time. The reference tab is shown in every picture for correction purpose. The digital pictures are transferred into the computer and processed with color pilot software,based on the color of the reference tab. Results After color correction with color pilot,the color difference of the same tab is always lower than 1.5,no matter what the condtion is.Aperture has a relatively big influence than other conditions like the operator,time,light condition. The color difference between different tabs is always superior to 3 without considering conditions. Conclusion Digital photographs can be used to evaluate color change after appropriate correction.