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A pinhole camera is a simple camera without a lens but with a tiny aperture (the so-called pinhole)—effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.
A camera obscura (pl. camerae obscurae or camera obscuras; from Latin camera obscūra 'dark chamber') [1] is the natural phenomenon in which the rays of light passing through a small hole into a dark space form an image where they strike a surface, resulting in an inverted (upside down) and reversed (left to right) projection of the view outside.
A hidden camera or spy camera is a camera used to photograph or record subjects, often people, without their knowledge. The camera may be considered "hidden" because it is not visible to the subject being filmed, or is disguised as another object. Hidden cameras are often considered a surveillance tool.
A pinhole camera is a simple camera without a lens that projects the image of an object through a small hole or aperture. Light passes through the pinhole to cast an image of the object on the ...
The pinhole camera model describes the mathematical relationship between the coordinates of a point in three-dimensional space and its projection onto the image plane of an ideal pinhole camera, where the camera aperture is described as a point and no lenses are used to focus light.
The brain reorients the image. This optical process of projecting an inverted image is known as a camera obscura (from the Latin, meaning dark room). The first pinhole/camera obscura eyes evolved about 540 million years ago on a sea mollusk, known as a nautilus, during the Cambrian period. The camera obscura principle is primordial, and life on ...
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