Thursday, January 3, 2019

1.3.3 (e): describe the principles of operation of digital cameras and describe how they are applied to real life scenarios.



A digital camera is a camera which can produce digital images that can be stored in a computer

Back in the day, cameras used film to record photos. The photographer wasn't able to see what they have taken a picture of before it was developed. This made their use quite expensive, as unwanted photos couldn't be deleted.

Now digital cameras have taken over. People can now transfer their photos to their devices using a USB cable or Bluetooth.

A digital camera is controlled by a microprocessor which can:
Automatically focus on images.
Automatically operate the flash
Adjust shutter speed
Adjust the aperture size
Adjust the size of the image
Remove "red eye"

A photograph is captured when light passes through the lens onto a light-sensitive cell.

This cell is made of pixels. The number of determines the file size used to store the image. But by reducing the resolution, the storage requirement is reduced.

The quality of a photograph depends of factors such as lighting and type of lens used.

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