“偷拍”的英语表达怎么说？

表述一：
Stealthie is a photograph of one or more people, taken without their knowledge or consent.
未经他人同意，或在他人不知情的情况下拍摄的照片叫“偷拍照”。

stealthie：[ˈstelθɪ]

n. 偷拍照（未经别人同意或者在别人不知情的情况下拍摄的照片）

表述二：
还可以用“candid”这个单词表示：

例如“A candid photograph”就是“一张偷拍的照片”。
candid英 [ˈkændɪd]  美 [ˈkændɪd] adj. 坦率的，直言不讳的；抓拍的，偷拍的；公正的
英文释义：
A candid photograph of someone is one that was taken when the person did not know they were being photographed. 偷拍的
例句：
candid snaps of off-duty film stars.偷拍的荧幕下影星们的照片。
表述三：
sneak shot
sneak英 [sniːk]  美 [sniːk] v. 偷偷地走，潜行；偷带，私运；偷走；偷偷地做（或获得）；打小报告，告密n. 打小报告的人，告状者；鬼鬼祟祟的人；偷偷摸摸的行为adj. 出其不意的，偷偷摸摸的
英文释义：
If you sneak a look at someone or something, you secretly have a quick look at them. 偷偷地看
例句：You sneak a look at your watch to see how long you've got to wait.你偷偷看一眼手表，看还要等多久。
相关：
peep英 [piːp]  美 [piːp] v. 窥视，偷看；隐现，微现；看；（使）发出喇叭声；（使）发出尖细的声音n. 一瞥；说话，声音；吱吱声，啾啾声；喇叭声
They crept to the door and took a trembling peep. 他们蹑手蹑脚地走到门口，哆哆嗦嗦地偷看了一眼。
snoop英 [snuːp]  美 [snuːp] v. 窥探，调查，打探n. 窥探者，私家侦探；窥探
英文释义：
If someone snoops around a place, they secretly look around it in order to find out things. 窥探
例句：He had a snoop around her office. 他在她的办公室窥探一番。