Other image forming techniques
Besides the camera, other methods of forming
images with light are available. For instance, a photocopy or xerography
machine forms permanent images but uses the transfer of static electrical
charges rather than photographic film, hence the term electrophotography.
Photograms are images produced by the shadows of objects cast on the
photographic paper, without the use of a camera. Objects can also be placed
directly on the glass of an image scanner to produce digital pictures
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