1.  Describe the process to acquire images from various
devices or sources using appropriate software.

2. In This Chapter, you’ll learn on:
 Describe the constraints in digital imaging in terms
of:
o Generation loss
o Resolution
o Quality of source

3. Raw Image
 A raw image file contains minimally processed data from the
image sensor of a digital camera, image scanner, or motion
picture film scanner.
 Raw files are so named because they are not yet processed
and therefore are not ready to be printed or edited with a
bitmap graphics editor.
 Normally, the image is processed by a raw converter in a
wide-gamut internal colourspace where precise adjustments
can be made before conversion to a "positive" file format such
as TIFF or JPEG for storage, printing, or further manipulation,
which often encodes the image in a device-dependent
colourspace. Therefore before you can edit any image, you
must first convert it into binary data, or softcopy.

4. Generation loss
 Any image, whether it is a drawing, a painting,
photograph, film or video, can be turned into the
binary data used by a computer through the use of
a digital camera, scanner or video digitizer etc.,
and its manipulated without the loss of image
quality known as 'generation loss'.

5. Resolution
 The resolution of a digital image is defined as the
number of pixels it contains. Higher resolutions (if
available as an option) create only marginal
benefits but takes up more card space. Lower
resolutions only make sense if you are running out of
card space and/or image quality is not important.

6. Quality of source
 The resolution level images are saved at will have a
great impact on the clarity and quality of the
image, especially if you choose to expand the
dimensions of the image. High quality resolution is
300 dpi, but 72 dpi is ideal for display on a computer
monitor or TV.