zài / tòu shì tú / zhōng / tóu yǐng zhōng xīn / de / wèi zhì / jué dìng / le / tú xiàng / de / bǐ lì在透视图中,投影中心的位置决定了图像的比例。In perspective drawing, the position of the center of projection determines the proportion of the image.