Monday 8 February 2010

How A Camera Works

Capture - reflected light from an object passes into a camera and then onto a light sensitive surface.
Process - The captured image is turned into something we can see.
Store - The image is put onto something we can keep, such as a printed photograph.

Analogue Photography
1. Light enters the camera through the lens.
2. Light hits the light sensitive film and reacts with it.
3. The film is removed from the camera and put into chemicals for developing into negative.
4. Negative projected onto photographic paper and printed, using more chemicals.

Digital Photography
1. Light enters the camera through the lens and hits the light sensitive sensor.
2. The signal from the sensor is converted into digital data by a processor.
3. Digital data is stored as an image on a storage medium in the camera.

Transferring images to the computer.
- USB
- Removable Card
- WiFi
- Bluetooth

JPEG - when a captured image is turned into a JPEG, though the quality is sacrificed for a reduction in the size of the file - consequently this is known as a "lossy" process.

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