A digital camera captures images digitally using a sensor called a CCD instead of film. When a picture is taken, the image data is saved in internal memory like an SD card rather than on film. A high definition camera has higher resolution, with minimum resolutions of 1280x720 for 720p or 1920x1080 for 1080p video. Individual image pixels are tiny dots that make up the overall picture, with more pixels allowing more detail. A CMOS sensor is another type of image sensor that uses a complementary metal-oxide semiconductor to convert light striking each photodetector into electric charge and then pixels.

1. Digital Camera.

2. What is digital camera?
A digital camera is a similar to a
traditional film-based camera, but it
captures images digitally. When you take
a picture with a digital camera, the image
is recorded by a sensor, called a "charged
coupled device" or CCD. Instead of saving
the picture on analog film like traditional
cameras, digital cameras save photos in
digital memory. Some digital cameras
have built-in memory, but most use
an SD or Compact Flash card.

3. What is High Definition camera?
High-definition video or HD
video refers to any video system
of higher resolution than
standard-definition (SD) video,
and most commonly involves
display resolutions of 1280×720
pixels (720p) or 1920×1080 pixels
(1080i/1080p).

4. What is pixel?
Short for Picture Element, a pixel is a
single point in a graphic image. Graphics
monitors display pictures by dividing
the display screen into thousands (or
millions) of pixels, arranged in rows
and columns. The pixels are so close
together that they appear connected.

5. The number of bits used to represent each pixel determines how
many colors or shades of gray can be displayed. For example, in 8-
bit color mode, the color monitor uses 8 bits for each pixel, making
it possible to display 2 to the 8th power (256) different colors or
shades of gray.
On color monitors, each pixel is actually composed of three dots --
a red, a blue, and a green one. Ideally, the three dots should all
converge at the same point, but all monitors have
some convergence error that can make color pixels appear fuzzy.
Resolution:
The amount of detail that the
camera can capture and it is
measured in pixels.
The more pixels a camera has,
the more detail it can capture and
the larger pictures can be without
becoming blurry or "grainy."

6. What is CMOS Sensor ?
A CMOS sensor is a type of image sensor inside a digital camera
consisting of an integrated circuit that records an image.
The complementary metal-oxide semiconductor (CMOS) sensor
consists of millions of pixel sensors, each of which includes a photo
detector. As light enters the camera through the lens, it strikes the
CMOS sensor, which causes each photo detector to accumulate an
electric charge based on the amount of light that strikes it. The
digital camera then converts the charge to pixels that make up the
photo.
CMOS uses a slightly different technology from CCD, another type
of image sensor found in digital cameras. CMOS is becoming the
more popular type of technology because of its low power
consumption and speed.
(complementary metal-oxide semiconductor)

7. Presented by:
Noor Tariq
B.S 5th semester
Mass communication