Who is that person next to you in the picture? 照片里你旁边那个人是谁啊?
In the picture 照片里(拍照里有…); on the picture 在照片表面
e.g. I see Peter is in a picture on your desk. 我看见你桌子上有摆皮特的照片。
e.g. Here is a picture from my party. Peter was there but He’s not in the picture. 这有一张我们排队的照片,皮特也去了,但是照片里没拍到他。