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Voyeurism is the sexual interest in or practice of spying on people engaged in intimate behaviors, such as undressing, sexual activity, or other actions usually considered to be of a private nature.〔Hirschfeld, M. (1938). ''Sexual anomalies and perversions: Physical and psychological development, diagnosis and treatment'' (new and revised edition). London: Encyclopaedic Press.〕 The voyeur does not normally interact directly with the subject of his/her interest, who is often unaware of being observed. The essence of voyeurism is the observing but may also involve the making of a secret photograph or video of the subject during an intimate activity. The term comes from the French ''voyeur'' which means "one who looks". A male voyeur is commonly labeled as "Peeping Tom", a term which originates from the Lady Godiva legend. However, that term is usually applied to a male who observes somebody secretly and, generally, not in a public place. ==Techniques== Although spy cameras small enough to fit inside a pocket-watch had existed since the 1880s, advances in miniaturization and electronics since the 1950s have greatly aided the ability to conceal miniature cameras, and the quality and affordability of tiny cameras (often called "spy cameras" or subminiature cameras) has now greatly increased. Some consumer digital cameras are now so small that in previous decades they would have qualified as "spy cameras", and digital cameras of twenty megapixels or more are now being embedded in some mobile camera phones. The majority of mobile phones in use are camera phones. Certain image capturing devices are capable of producing images through materials that are opaque to visible light, including clothing. These devices form images by using electromagnetic radiation outside the visible range. Infrared and terahertz-wave cameras are capable of creating images through clothing, though these images differ from what would be created with visible light. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「voyeurism」の詳細全文を読む スポンサード リンク
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