Nick Knight

Digital photography refers to the technology of recording images using digital imaging components (CCD, CMOS) instead of traditional film.

Cameras equipped with digital imaging components are collectively referred to as digital cameras. For digital photography, the capture of optical images still uses the principle of aperture imaging, but it converts the optical image projected thereon into digital information that can be recorded in a storage medium (CF card, SD card).

The imaging can be generated in a standard bitmap image format and modified by bitmap image editing software such as Photoshop, and output as a physical photo via digital printing or printer, or can be displayed on a display, projector, electronic photo album, etc.

Tools can be displayed directly or converted to a variety of suitable formats for web publishing or email delivery.Compared with traditional film, digital media has the advantages of recyclability, direct viewing of captured images, simple modification at the later stage, and elimination of printing. This decade has been widely accepted by the photography industry and has a high market share.

Digital cameras use light sensitive sensors, which record the amount of light falling onto separate little sections of a digital chip – the picture elements or pixels. As light strikes each pixel it is converted into an electronic signal which, at the end of the exposure time, is conducted from the sensor onto another digital recording medium which can store the output from hundreds or thousands of individual exposures

Digital cameras come in different configurations and with different size sensors just as film cameras. The ability of a sensor to record fine detail is primarily a function of the number of individual picture elements and in modern digital cameras this can range from 12 million pixels to 45 or 50 million pixels.

The few most obvious benefits of digital cameras over film are:

  • No film need be developed, thus no supply or costs.
  • Pictures are available immediately
  • The editing of digital images is much easy than typical film editing.

The explosion in the use of cameras has spurred the development of technology to a point where the simplest phone camera is much more sophisticated than the most complex film camera of 20 years ago.