首先，我打开拍摄的源照片，这张照片主要是为分离人物和地面上影子而拍摄的(这里是说，作者需要一张易于扣取人物及其影子的照片——译者注)。

First off I opened the original image resulted from the shooting with the main purpose being isolating the character and the shadows on the floor.

youdao

And I have up here--This is a picture of Elizabeth Spelke, who is a developmental psychologist who's developed the most research on looking at babies' looking times and what you could learn from them.

这里是一张伊丽莎白·斯皮克的照片,她是一个发展心理学家,在婴儿注视次数,及其意义方面研究颇多

耶鲁公开课 - 心理学导论课程节选