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Digital photography, as opposed to film photography, uses electronic devices to record and capture the image as binary data. more...

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This facilitates storage and editing of the images on personal computers, and also the ability to show and delete unsuccessful images immediately on the camera or software itself.

Digital cameras now outsell film cameras and include features that are not found in film cameras such as the ability to shoot video and record audio. Some other devices, such as mobile phones, include digital photography features.

Sensors and storage

Sensors read the intensity of light as filtered through different color filters, and digital memory devices store the digital image information, either as RGB color space or as raw data.

There are two main types of sensors:

charge-coupled device (CCD) – photocharge is shifted to a central charge-to-voltage converter; CMOS sensors ("Active pixel sensor");

Nearly all digital cameras now use solid state flash memory, but for a time floppy disks were used in early digital cameras such as the Sony Mavica.

Multifunctionality and connectivity

Except for some linear array type of cameras at the highest-end and simple web cams at the lowest-end, a digital memory device (usually flash memory; floppy disks and CD-RWs are less common) is usually used for storing images, which may then be transferred to a computer later.

Digital cameras can take pictures and sometimes additionally record sound and video. Some can be used as webcams, some can use the PictBridge standard to connect to a printer without using a computer, and some can display pictures directly on a television set. Similarly, many camcorders can take still photographs, and store them on videotape or on flash memorycards.

Performance metrics

The quality of a digital image is the sum of various factors, many of which are similar to film cameras. Pixel count (typically listed in megapixels, millions of pixels) is only one of the major factors, though it is the most heavily marketed. Pixel count metrics were created by the marketing organizations of digital camera manufacturers because consumers can use it to easily compare camera capabilities. It is not, however, the major factor in evaluating a digital camera. The processing system inside the camera that turns the raw data into a color-balanced and pleasing photograph is the most critical, which is why some 4+ megapixel cameras perform better than higher-end cameras.

Lens quality: resolution, distortion, dispersion (see Lens (optics)); Capture medium: CMOS, CCD, Negative film, Reversal Film etc.; Capture format: pixel count, digital file type (RAW, TIFF, JPEG), film format (135 film, 120 film, 5x4, 10x8).; Processing: digital and / or chemical processing of 'negative' and 'print'.;

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