Feb 172013



If you are one of those who can take good pictures with digital camera but without knowing how it works, or who are going to get yourself a digital camera, it’s time we took a brief look at how a digital camera works. Go through this article.

The first camera was created by Frencher inventor Nicephore Niepce in the late 1820s, which is capable of recording a permanent image, however, his early cameras were difficult to use. Through the 1800s and 1900s, cameras continue to evolve in complexity, until in december 1975, Steven Sasson and Kodak developed the first digital camera that captured images and stored them on a magnetic cassette tape, which can be transferred to other storage media or printed out. Though the digital camera comes a long way, how they work remains the same.


The Basics:

Like the traditional film camera, a digital camera also uses a shutter and eye to caputre light from an image. However, instead of using a chemical process to imprint the image on a film negative, it captures the image digitally. The data representing the image is stored in bits and bytes. In most cases, digital cameras store images on flash memory cards or USB sticks, along with which, Card data recovery softwares occurred to recover all your important pictures or files when your flash memroy cards are USB sticks aren’t working.


CCD and CMOS Sensors:

To capture light from an image in digital format, a digital camera uses a special sensor, namely: CCD(charge-coupled device) or CMOS(complementary metal-oxide semiconductor) sensor. Both are the size of a fingernail and fabricated out of silicon, the surface of the sensor contains millions of micro-sized diodes that capture a single pixel of the image captured by the lens eye. Generally, digital cameras with higher megapixel ratings take higher resolution pictures than those with lower megapixel specifications.


Color Conversion:

Each film cameras could only take photographic image in black and white. However, the modern cameras use a process called “interpolation” to filter red, blue and green colors an then combine them once the shuttter allows an image to pass to the eye of the camera, as we know, all the colors in viewable spectrum contain some mixture of red, blue and green, and the sensors in the camera provides all the red, green and blue information for the processor in the camera to interpret colors from the image scene passed from the lens to the sensor.


The Computer Inside:

If your digital camera can perform such basic editing functions as red-eye removal, image enchancement and borders, it’s because a single-chip computer in the digital camera allows you to. The more expensive and larger the chip, the more advanced capacity it has.

 Posted by at 8:32 am

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