頻譜影像結合雲端色彩配色之技術演進

Progress of Spectrum Imaging Combined With Color Matching Online

本研究中運用行動載具多頻譜影像擷取外掛系統，開發多角度頻譜色彩模擬技術及多角度色彩印刷複製技術，可協助國內特殊色油墨的調配及模擬。多角度頻譜色彩模擬技術，在多角度的光源觀測環境下，記錄特殊印刷油墨材料在各個觀測角度下之空間色彩變化，分析其光譜變化量後，可再轉換為材料的多角度色彩資訊做應用，並模擬不同角度下之金屬色、珠光色油墨堆疊後的色外貌變化視覺觀測影像，有利於針對環保金屬色、珠光等特殊油墨的調配及特殊色印刷品的校樣及對樣色差ΔE<3。有了上述技術可衍伸發展頻譜色彩雲端匹配技術，透過匹配資料庫，有利於遠距色彩檢索，並解決帶有光澤之金屬色的特殊顏料配色問題。研究中可針對金屬色色樣， 透過色彩分光反射率資料的讀取，以確保特殊色可進行色彩配色作業。此外，以多種材質進行配色模擬，實現特殊材質的配色分析，達成光澤色彩的精確調配，增加特殊材質印刷的應用價值。所以隨著印刷技術與美感需求的不斷提昇，印刷品品質要求包括印刷底材的材質，及印刷後加工處理等，這些特性可以運用多角度觀測的色彩、光澤變化來描述，也可透過色溫來呈現不同情境。相關技術也可擴展塑膠產業、紡織產業或陶磚瓷釉產業等非紙材材質，且需要用到色彩的產業中。

In this research, the multi-spectrum image capturing extended system of mobile device is used to develop multi-angle spectrum color simulation technology and multi-angle color printing and reproduction technology, which can assist in the blending and simulation of special color inks. Multi-angle spectrum color simulation technology, in a multi-angle light source observation environment, record the changes of special printing ink materials at various observation angles. After analyzing the spectral changes, it can be converted into multi-angle color information of the material for application, which can be used for simulating the visual observation image of the color appearance changes after stacking metallic and pearlescent inks at different angles. It is beneficial for the blending of special inks such as environmentally friendly metallic inks and pearlescent inks, and for the reduction of color difference of special color of proofing that ΔE<3. With the above technology, the spectrum color matching online technology can be developed. Through the matching database, it is conducive to remote color retrieval and solves the problem of color matching of special pigment with shiny metallic colors. In this research, the metallic color samples can be analyzed through the color spectral reflectance data to ensure that special colors can be used for color matching operations. In addition, a variety of materials are used for color matching simulation to realize the color matching analysis of special materials, achieve the precise blending of gloss colors, and increase the application value of printing with special materials. Therefore, with the continuous improvement of printing technology and aesthetic requirements, the quality requirements of printed products include the material of printing substrate, and post-printing processing, etc. These characteristics can be described by the color and gloss changes observed from multiple angles, and can also be presented through color temperature. Technologies in this research can be expand the field of use for industries that use non-paper materials such as the plastic industry, textile industry, or ceramic tile industry that require color.