色彩影像顯示器需要真實物體的色彩再現，而使用多主色顯示器能輕易地擴大呈現人類所能感知的色彩。然而色彩影像在不同媒介間之轉換須適當地將色彩對映出正確的色彩，建立顯示媒介之色域空間為色彩對映的第一步。本文首先將介紹多主色色域邊界理論，藉此推論出適當地設定數位訊息，即可直接取得多主色顯示媒介之色域體積邊界上的色彩點，並由這些色彩點作為基點去建構出色域體積邊界，使建構色域體積邊界的速度加快。

The display of color images needs the color reproductions of real object color. The multi-primary color displays can demonstrate easily more colors of human visual perception. However, color images transforming between different devices require an appropriate color mapping for displaying colors, and the first step of color mapping is the construction of color volume boundary of device. The paper proposes the color gamut boundary of multi-primary color devices, and the color points on the color volume boundary of multi-primary color devices can be obtained by setting appropriate digital information. The construction of color volume boundary based on these color points is quick and effective.