| Digital
Photography (contd.) |
|
|
|
|
|
|
|
|
|
|
| • | The big
difference between traditional film cameras and digital |
||||||||
| cameras is how
they capture the image. |
|||||||||
| • | Instead of
film, digital cameras use a solid-state device called |
||||||||
| an image
sensor, usually a charge-couple device (CCD). |
|||||||||
| • | On the surface
of each of these fingernail-sized silicon chips is |
||||||||
| a grid
containing hundreds of thousands or |
|||||||||
| millions of
photosensitive diodes called |
|||||||||
| photosites,
photoelements, or pixels. |
|||||||||
| Each photosite
captures a single pixel in |
|||||||||
| the photo-graph to be. |
|||||||||
|
|
|
| An image
sensor sits against a background |
||
| enlargement
of its square pixels, each capable of |
||
| capturing one pixel in
the final image |
||