The Basics of How Does a Digital Camera Work? - CCD and CMOS Sensors


The Basics of How Does a Digital Camera Work? - CCD and CMOS Sensors

The digital camera is one of the most remarkable instances of this shift because it is so truly different from its predecessor. In the late 1820s, French inventor Nicephore Niepce created the first camera which was capable of recording a permanent image. In December 1975, Steve Sasson and Kodak developed the first digital camera.

The Basics of How Does a Digital Camera Work? - CCD and CMOS Sensors

That digital camera captured and stored images on a magnetic cassette tape. In the middle of 1990s digital cameras became common consumers. The beginning of the 2010s smart phones had a unified digital camera.

The Basics

A digital camera takes the image digitally. The data of the image is stored in bits and bytes. A digital image is just a long string of 1s and 0s that represent all colored dots or pixels using them make up the image. Computers and digital devices easily interpret it. In most cases, digital cameras store images on flash memory cards or USB sticks. Some models store image data on disk drives of laptop or computers.

CCD and CMOS Sensors

A digital camera uses a special sensor, is called by CCD (charge-coupled device) and CMOS (complementary metal-oxide semiconductor) sensor. The CCD is a collection of tiny light-sensitive diodes, which convert photon into electrons. These diodes are called “photo-sites”.

The more diodes on the sensor, that increase the quality of picture which take by digital camera. Digital cameras with higher megapixel ratings take higher resolution, clear pictures compare to models of lower megapixel camera.

Color Conversion

Each photosite is colorblind. Most sensors use filtering images with three primary colors Red, Blue, Green. Latest cameras use a sophisticated process called “interpolation” using red, blue and green colors it filter images and then combine them that allows an image to pass to the eye of the camera.

The CCD or CMOS sensor in the camera provides all of the RGB (red, green, blue) information to the processor in the camera to interpret colors from the image scene passed from the sensor.

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The Computer Inside

When you take a picture with a digital camera, millions of operations occur quickly inside the camera. Likes capture, interpolate, compress, filter, store and preview images. Computer has a processor, memory and a storage media. In digital cameras user use limited number of functions and advanced math operations.

Digital cameras with the simple computer chips perform basic picture-taking functions. Advanced models have larger, higher-capacity chips that allow the user to perform basic editing functions for example, red-eye removal, image enhancement and borders on the camera before the images are transferred to a PC.

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