为了更好地发挥投影仪在大屏幕拼接显示系统中的作用，需要对投影仪的颜色系统进行深入研究，使之达到颜色一致的效果。以2台投影仪组成的拼接显示系统为例，比较了阶调曲线法、颜色主刺激值修正算法和BP神经网络在投影仪颜色空间转换过程中的特点，得出了BP神经网络是投影仪颜色空间转换的最优模型，可推广应用于同类型颜色空间转换模型的研究。

In order to play well in large format tiled multiple projectors display system, color uniformity should be calibrated. A two-projector titled system was researched. The methods of tone curve, color principal component correction algorithm, and BP neural network were used in projectors' color space conversion. The result showed BP neural networks is an optimal model and it can promote a wide use of the same color space conversion modeling.