在本論文我們提出一個便利且具彈性的以使用者為導向之彩色化系統，參考邊緣資訊，對使用者在灰階影像上給定的幾筆塗筆（Scribbles）進行塗筆範圍擴張，以決定每個像素的色差；對未擴張到的部份的每個像素，定義並計算其與每個塗筆顏色之距離，來決定其色差。除此，為了增加效能與使用的便利性，本系統提供多樣的強化模組，讓使用者能以簡易的操作方式得到滿意的彩色化結果。實驗結果顯示本論文所提的彩色化系統，確實能讓使用者簡單且快速地塗色，並得到令人滿意的彩色化結果。 This paper presents a flexible and effective colorization system that carries out colorization by performing two stages of chrominance determination for pixels in a gray-scale image, including scribble region expansion and chrominance blending. The region corresponding to each scribble color is determined by expanding the scribbles in parallel associated with the edge map of the given image. Usually a few pixels remain unassigned to a color region after this stage. For those pixels we define and compute the transportation distance between each pixel and each scribble color. Then the reciprocals of the distances are used as weights to assign each of those pixels a weighted sum of the scribble colors. To promote practicability and effectiveness of the system several modules are provided that make the system more user-friendly and enhance the colorization results. The experimental results show that the proposed system is not only flexible and easy to use, but it also provides natural and satisfactory colorization results.
