Digital camera

Sorry for posting so late, actually I was busy in developing the blog and learning new codes, but I hope that this post would make you happy and help you to forgive me.  

The Digital Camera

The word “photography” comes from Greek words which, combined, mean “to draw with

light” (from photos, or “light,” and graphis, or “drawing”). Photography is the technique of

recording fixed images on a light-sensitive surface. Digital cameras are based on the

principles of traditional photography, but, instead of fixing images on film coated with chemical

substances sensitive to light, they process the intensity of the light and store the data in digital

files. Modern digital cameras generally have multiple functions and are able to record sound and

video in addition to photographs.

The Digital System

The Sensor that Replaces Film

The CCD (charge-coupled device) is a group of small diodes sensitive to light

(photosites), which convert photons (light) into electrons (electric charges).

Binary system processing

To convert the electric charges of the

photosite (analog) to digital signals, the

camera uses a converter (ADC), which

assigns a binary value to each one of the

charges stored in the photosite, storing

them as pixels (points of color).

ADDITIVE MIXTURE

Each pixel is colored by mixing values of RGB.

Varying quantities of each of these colors can

reproduce almost any color of the visible

spectrum.

The value of each can vary from 0 (darkness)

to 255 (the greatest color intensity).

Resolution

is measured in PPIs, or pixels per square inch—

the number of pixels that can be captured by a

digital camera. This figure indicates the size and

quality of the image.

Compression and Storage

Once the image is digitized, a

microprocessor compresses the data in

memory as JPG or TIFF files.

Even mobiles are serving a good place in capturing images and videos, but still digital cameras are only option if your pretty serious in capturing pictures and their quality.
according to a survey during in 2006, it was found that 110 million number of digital cameras sold worldwide.

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