Any idea of what I have typed there in the title?

” You press the button, they do the rest ” – that’s how photographer defined ” Digital Photography “.

 

The broad term for this technology is “smart capture”; it lets amateurs emulate the decisions a professional with years of experience would make automatically. It irons out the issues that mar many casual snaps, such as heavy backlighting casting the subject of the photo’s face into shadow, camera shake causing a blurry image and so on.

If you bought your digital camera more than a year or two ago, or didn’t read its manual, chances are you’re missing out on some of this stuff. Much of it has arrived on the market without fanfare, in crude form, while manufacturers tinker with the technology.

So-called “face tracking” or “face detection” technology ensures that the face of your subject remains in focus at all times. You can make your camera home in on an individual or group of people, and let it automatically determine the sensor exposure, flash exposure and white balance needed in a wide range of conditions. It even lets you pan in and out on your subject, to decide whether you’d prefer a close-up or a wide-angle photo, all the time keeping your subject’s face at the centre of the frame.

The camera can spot the face of your subject by analysing their features – it can recognise eyes by the darkness of the pupils, and their relative distance above the line of the mouth; it can tell when your subject smiles by waiting until the curvature of the mouth passes a certain threshold; it can detect if a subject has blinked, and warn you on-screen, to let you take another picture.

 

Here are some advantages of Digital Photography:

Instant review of pictures, with no wait for the film to be developed: if there’s a problem with a picture, the photographer can immediately correct the problem and take another picture

Minimal ongoing costs for those wishing to capture hundreds of photographs for digital uses, such as computer storage and e-mailing, but not printing

If one already owns a newer computer, permanent storage on digital media is considerably cheaper than film

Photos may be copied from one digital medium to another without any degradation

Pictures do not need to be scanned before viewing them on a computer

Ability to print photos using a computer and consumer-grade printer

Ability to embed metadata within the image file, such as the time and date of the photograph, model of the camera, shutter speed, flash use, and other similar items, to aid in the reviewing and sorting of photographs. Film cameras have limited ability to handle metadata, though many film cameras can “imprint” a date over a picture by exposing the film to an internal LED array (or other device) which displays the date.

Ability to capture and store hundreds of photographs on the same media device within the digital camera; by contrast, a film camera would require regular changing of film (typically after every 24 or 36 shots)

Many digital cameras now include an AV-out connector (and cable) to allow the reviewing of photographs to an audience using a television

Anti-shake functionality (increasingly common in inexpensive cameras) allow taking sharper hand-held pictures where previously a tripod was required

Ability to change ISO speed settings more conveniently in the middle of shooting, for example when the weather changes from bright sunlight to cloudy. In film photography, film must be unloaded and new film with desired ISO speed loaded.

Smaller sensor format, compared to 35mm film frame, allows for smaller lenses, wider zoom ranges, and greater depth of field.

Ability to use the same device to capture video as well as still images.

Ability to convert the same photo from color to sepia to black & white

 

Disadvantages of Digital Camera:

 

Dependence upon spare batteries which are heavy to carry and whose lack makes equipment unusable. Batteries used by some film cameras are smaller and not drained as quickly.

Many digital sensors have less dynamic range than color print film. However, some newer CCDs such as Fuji’s Super CCD, which combines diodes of different sensitivity, have improved this issue.

When highlights burn out, they burn to white without details, while film cameras retain a reduced level of detail, as discussed above.

High ISO image noise manifests as multicolored speckles in digital images, rather than the less-objectionable “grain” of high-ISO film. While this speckling can be removed by noise-reduction software, either in-camera or on a computer, this can have a detrimental effect on image quality as fine detail may be lost in the process.

 

 

 

____________________________________________________________________________

Source:
http://en.wikipedia.org/wiki/Digital_photography