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The word photography comes from the Greek Φ English: phos (light) and ρ ρ ρ English: graphis (painting, sketch) or ρ ρ ρ ρ? Graphê together means "painting with light". Photography refers to the process of recording images with some special equipment. Generally, we take photos with mechanical cameras or digital cameras.
Sometimes photography is also called photography, that is, the process of exposing a photosensitive medium by using the light emitted or reflected by an object. Someone once said an incisive language: the photographer's ability is to transform the fleeting ordinary things in daily life into immortal visual images.
In June 2020, the National Copyright Administration issued the Notice on Standardizing the Copyright Order of Photographic Works, which clarified the copyright issues related to photographic works, intensified the copyright rectification in the field of pictures, and promoted the construction of a long-term mechanism for copyright protection of photographic works.
When taking pictures, light enters the cassette through a small hole (more often, a lens group) and forms an image on the medium on the back of the cassette (relative to the incident direction of light). According to the actual light intensity and the photosensitive ability of the medium, the required light time is also different. In the process of illumination, the medium is irradiated by light.
After photography is completed, the image information stored in the medium must be read by human eyes again through conversion. The specific method depends on the photosensitive means and medium characteristics. For film cameras, there will be chemical processes such as fixing, developing and enlarging. For digital cameras, pictures need to be processed by computers and then output by other electronic devices.
Generally speaking, people take pictures with visible light, and cameras are the most commonly used. Because of different scenes and uses, cameras have many classifications. Generally speaking, a camera must have several basic components to ensure the exposure process, including: photosensitive medium, imaging lens, exposure time control mechanism, film cassette, storage medium, electronic photoreceptor and electronic storage medium.