Bit
depth |
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Each
pixel in an image contains the number of bits
required to save/capture information about
the image. The higher the depth, the more colors
are stored in the image.
Learn
more
For example: a low bit-depth (1 bit) can only
show two colors: black and white. This is because
there are only two combinations of numbers in
one bit: 0 and 1. A 4-bit color image is capable
of showing 16 colors, since there are 16 different
combinations of 4 bits:
0000 0001 0010 0011 0100 0101 0110 0111 1000
1001 1010 1011 1100 1101 1110 1111
Also, 8-bit color has the capacity to show a
total of 256 colors; 16-bit color shows a total
capacity of 65,536 colors; 24-bit color can show
up to a total of 16,777,216 colors.
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Connectivity |
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The
ability to connect a host computer for image
download using USB cables. HP cameras are able
to connect directly to printers and camera
docks. Some systems may also include serial
or parallel cables for communications.
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Exposure
control |
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Digital
cameras require adjustments to control the
levels of brightness, color saturation, and
contrast in the final image. The factors that
define correct exposure in a charge-coupled
device (CCD) camera are the visible light spectrum
wavelength-dependent sensitivity, the intensity
of illumination, and the length of time the
CCD is exposed to light.
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Exposure
rating |
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Digital
cameras have an ISO rating indicating their
level of sensitivity to light. ISO 100 is the "normal" setting for most cameras, although some go as low as ISO 50. The sensitivities
can be increased to 200, 400, 800, or even
3200 on high-end digital SLR (single-lens reflex)
cameras.
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Focal
range |
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The
minimum and maximum range a camera can focus
on an object. This includes a range from a
moderate wide angle to moderate telephoto.
The ability to lock focus at infinity, and
to set focus manually. Maximum aperture ranges
depend on the lens zoom setting.
Learn
more
For example, focus ranges from 1.6 feet (0.5
meters) to infinity in normal mode, with a macro
setting ranging from 6 to 39 inches (14 to 100
centimeters); as well as standard and macro focus
modes.
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Imaging
technology |
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A
camera’s built-in tools for correcting two
very common complaints in point and shoot photographs:
red-eye removal and adaptive lighting.
Learn
more
For
example: adaptive lighting option (which may
be available in different strength settings)
simulates the effect of a fill flash by boosting
brightness in shadow areas of images.
Other features may include: HP Real Life Technologies
including In-Camera Panorama Preview, HP Image
Advice, HP Noise Filter, HP Adaptive Demosiac,
HP Vignetting, and HP Preferred Photo Reproduction.
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Zoom
capability |
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Also
called a digital camera’s focal length. Generally,
this is the distance measured in millimeters
and includes a “normal” view of how the naked
eye sees things, and a “wide-angle” view determined
by the ability of the lens to zoom out or in:
zoom does not always mean “close-up.”
Digital cameras may have an optical zoom, a digital
zoom, or both. See optical zoom and digital zoom.
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Embedded
Media Card Readers |
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Slots
built into an HP printer that allow it to print
photos directly from a memory card. HP media
card readers support most common memory card
formats, including CompactFlash Type I and
II, SmartMedia, Secure Digital, MultiMedia
Cards, Memory Stick, XD, and USB flash drive.
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Fax
PC Interface |
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Support
for faxing from a PC without a physical document
to scan and fax. If you plan to fax a large
number of electronic documents created on a
PC, this feature allows you to avoid printing
the documents before faxing -- this saves time
and consumables.
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Hard
Disk |
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A
hard drive for your printer that can store
files, fonts, forms, and other commonly used
data right on a printer, which speeds the time
it takes to print a document. Some hard drives
also make it possible to protect confidential
documents by holding the document on the drive
until a user physically enters a PIN on the
printer.
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Host-Based
Printing |
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A
printing approach that utilizes the processor
on the PC that is sending a print job to create
the printable pages, rather than generating
those pages on the printer itself. Printers
that utilize host-based printing can be more
cost-effective because they do not require
a powerful processor of their own. Since HP's
host-based printing solutions utilize the GDI
interface that is built into Microsoft Windows,
you can begin using host-based printing immediately
without investing in additional software.
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Multitasking
Capability |
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The
ability of a Multifunction product (MFP) or
All-in-One (AIO) to perform multiple functions
at one time. When you choose an MFP or AIO
with this functionality, you can utilize more
than one feature of your device at one time,
which improves productivity and device utilization.
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Print
Drivers |
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The
standard drivers available to allow the printer
to interface with different operating systems
and applications. HP regularly makes printer
drivers available for systems beyond Windows,
including Mac and Linux, so your printer will
work seamlessly with all of the computers in
your office.
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Type
Faces |
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Built-in
support for a collection of standard typefaces
that make it easy to create the look you want.
Select HP printers support a variety of typefaces,
including Microsoft Windows fonts, scalable
TrueTypefonts, and PostScript language fonts.
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Wi-Fi |
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The
family of 802.11x wireless LAN protocols that
allow computers to communicate with one another
without wires. HP offers both internal and
external Jetdirect print servers to extend
Wi-Fi capabilities to your printers so they
can participate on a wireless network like
your PCs and notebooks. Select printers also
include embedded support for Wi-Fi. A wireless
printing infrastructure is easy to adapt and
easy to grow as your companies needs expand.
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Copy
Settings |
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The
copy capabilities that an HP Multifunction
product (MFP) or All-in-One (AIO) supports.
Common copy features include fit-to-page, reduce/enlarge,
resolution, contrast, copy collation, number
of copies and paper size. Color MFPs and AIOs
may have different copy settings for color
and black & white.
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Duplex
Printing |
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Printing
on both sides of a page. Auto-duplexing printers
offer automatic double-sided printing with
help from a duplexing accessory that allows
the printer to automatically output a two-sided
page. This feature makes it easy to print on
both sides of the page without manual intervention
and saves paper.
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Double-sided
printing |
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See
Duplex Printing.
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Input
Capacity |
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The
number of sheets of standard printer paper
that can be stored in a printer's paper trays.
Because they do not require constant refilling,
printers with high input capacities are particularly
useful for printers used by a workgroup or
any large group of people.
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Media
Size |
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The
sizes of paper, envelopes, and other media
that a printer's paper trays will support.
The more media sizes your printer supports,
the more flexibility you have in the types
of documents you can print on that printer.
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Media
Type |
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The
various types of media a printer supports.
Beyond standard office paper, which may include
plain, glossy, letterhead, recycled, and other
standard weight papers, a printer may also
support envelopes, transparencies, cardstock,
labels, and more. It's better to choose a printer
with a wider variety of media options than
to try to force the printer to print on media
it doesn't support.
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Media
Weight |
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The
paper weights that a printer supports. Paper
weight is determined by the total weight of
500 pieces of paper. Standard laser or inkjet
paper typically weights 24lb, while photo papers
may weigh 32lb and higher. The higher the paper
weight your printer supports, the more media
options it will have.
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Output
Capacity |
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The
number of sheets of standard printer paper
that can be stored in a printer's output trays.
The higher a printer's output capacity, the
better it can support large printing projects.
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Printing
- Paper Handling |
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Support
for professional paper handling functionality
such as duplexing, folding, saddle stitching,
corner stapling, and stacking. If you are producing
marketing or other professional documents on
your in-house printer, finishing capabilities
add the final touch.
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Copy
Resolution (color/black) |
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The
maximum resolution, measured in dots per inch
(DPI), that an HP Multifunction product (MFP)
or All-in-One (AIO) can produce on copied documents.
Generally, the higher the DPI, the better the
detail and clarity your copied document will
have.
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Dots
per inch (dpi) |
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Dots
per inch has been the traditional measurement
and indicator of a printer's output quality
and refers to how many dots of ink are placed
on each inch of a piece of paper or other media
by a printer. For more about output quality,
see resolution.
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Ink
Type |
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The
kind of ink an inkjet printer uses to transfer
a printed image to the page. HP inkjet and
Photosmart printers use pigment-based inks
that penetrate below the paper surface to provide
rich color depth, minimal dot visibility, and
uniform gloss. To learn more about ink technologies
and HP's innovations in ink, review this PDF from HP Labs.
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PhotoREt |
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| A
photo resolution enhancement technology
developed by HP to achieve the highest
quality photo printing results on photo
and plain paper with 289 levels of
shade for each color and a complete
palette in excess of 1.2 million colors.
Learn More
Printers
equipped with HP PhotoREt technology
uses color layering technology
to produce photo-quality color
images. With advancements in its
multidrop color layering process,
HP PhotoREt controls the placement
of those six inks more precisely
than before. Each dot is capable
of receiving up to 32 minuscule
drops of color, each one precisely
positioned to achieve smoother
gradations in tone and to virtually
eliminate any grain in the printed
image.
Full
dye-load inks in cyan, magenta,
and yellow, produce vibrant color.
Light dye-load inks of light cyan
and light magenta, as well as a
specially formulated dye-based
black ink, dramatically increase
the range of available colors,
while the black is richer, deeper,
and glossier than the usual black
that is produced by a composite
of colored inks. This means you'll
get finer details and a wider range
of colors.
The newest generation of HP color
layering technology - HP PhotoREt
IV - uses six-ink color printing
to produce up to 289 levels of color
for than 1.2 million colors. |
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Inkjet |
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HP's
thermal inkjet technology (TIJ) printers
use an array of tiny nozzles to create
millions of ink droplets, placing them
in precise combinations onto the paper
or other print media. To enhance speed,
reliability, and cost savings, HP's
business inkjet technology uses a modular
ink delivery system that separates
print heads from ink cartridges. This
system allows the print heads to move
more rapidly and ink cartridges to
hold more ink. Smart chips in the print
head monitor ink use and print head
condition for consistently efficient,
quality operation.
Inkjet technology offers:
- Support
for specialty papers, wide format,
and unique media types
- Photorealistic
image capabilities
- No
fuser or drum replacement costs
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Laser |
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Laser
printers apply lasers to a photoconductive
drum at specific printer dot locations.
Through this process, the drum is "imaged" with an electrical charge that attracts exacting combinations of toner particles
to the drum for transfer to the printed
page. At the end of the printing process,
a high temperature roller and a pressure
roller melt then fuse the plastic toner
particles to the paper. Due to the
heat involved in this process, there
is a more limited range of media supported
for LaserJet printing than inkjet printing.
Laser technology offers:
- High-volumes
and fast output of lengthy documents
- High-yield
consumables
- Multiple
high-volume paper trays and finishing
options
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Laser
Quality Speed |
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What
is itLaser Quality Speed (LQS) is an HP-developed
specification to enable a speed comparison
of HP Officejet Pro printers to laser
printers, thereby assisting customer
purchase considerations.
The print speed experienced by customers
from an Inkjet printer is highly dependent
on many variables, including the coverage
and content of the printed document.
In contrast, laser print speed is much
less dependent on document content
and coverage. The Laser Quality Speed
specification helps customers make
a performance comparison between the
print speeds of an inkjet printer and
a laser printer.
How
does it workTo measure Laser Quality Speed for
an inkjet printing device, HP prints
a representative suite of documents
in the printer’s default quality setting
(normal mode for HP Officejet Pro K550
Color Printer). The suite includes
several monochrome & color
documents, including pages of various
text coverage, and full page graphics
and image files. The speed reporting
methodology averages the print engine’s
black and color speeds, in pages per
minute, by calculating an average text
print speed, and then averages that
speed with the print speed of a more
complex, full page document. The resulting
average pages per minute (ppm) speed
determine the “Laser Quality Speed”
specification.
HP’s
Laser Quality Speed measurement
process is based on three important
factors:
- Speed
measurements use comparable print
qualities. For the HP Officejet
Pro K550 series printer, the
default plain paper normal mode
is used to generate the Laser
Quality Speed specification of
up to12 ppm black and up to 10
ppm color. This is up to twice
as fast as comparably priced
color lasers for color speeds.
- Speed
measurements are done over a
range of document types and content.
- The
measurement process is designed
to avoid the influence of the
host PC performance, and to represent
the printer hardware, or print
engine, performance.
This
approach allows a more direct comparison
with published laser printer ppm
speed specifications. Laser Quality
Speed is based on HP internal testing
and methodology and is not an industry
standard.
Where
is it used?
Laser
Quality Speed is used in product
data sheets, customer education
manuals, brochures, collaterals,
and other customer communications
meant to help customers make purchase
choices between inkjet and laser
printers. |
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First
Page Out |
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The
time it takes a printer to produce the first
page of print job when warming up from powersave
mode. HP Laser printers use Instant-on Technology to speed the first page out so you get your complete print job sooner
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Instant-on
Technology |
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Cutting-edge
fuser technology that allows HP laser printers
to produce the first page faster when the printer
is coming out of powersave mode, giving you
your complete print job sooner. Why waitLearn
more about Instant-on Technology and the benefits it offers.
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Memory |
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RAM
built into a print that increases print speed
and helps process large and complex documents.
Maximum memory is the total amount of memory
a printer can accommodate.
Learn
More
Memory
is an important consideration on most color printers
and for any printer you plan to share on a network
among multiple employees. For example, a color
LaserJet printer may utilize its memory to speed
the printing of complicated graphics or photographs,
making it easier and more efficient to print
color documents in-house regularly.
Similarly,
a shared office inkjet printer might utilize
memory to process several print jobs sent to
it from different employees at one time. This
reduces the time it takes to transfer the print
job from the employee computers to the printer
and helps employees get back to work more quickly.
A printer's
maximum memory is the total amount of memory
it can accommodate, and is typically more than
the standard memory that comes installed on
the printer. As you evaluate a printer, consider
how much memory you can add later as your printing
needs change.
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Recommended
Monthly Volume |
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The
number of output pages a printer is designed
to support on a monthly basis. While exceeding
the recommended volume occasionally poses no
problem, regularly exceeding it can reduce
the life of your printer and compromise print
quality. It's better to choose a printer whose
recommended monthly volume exceeds your current
needs so you have room to grow as your printing
needs grow.
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Cost
Per Page |
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The
total cost per U.S letter-sized page with 15%
color coverage or 5% monochrome coverage including
ink, replaceable parts, power, paper, and average
service costs. (The cost-per-page information
provided for individual printer models is based
on the best information available and is not
guaranteed accurate by Hewlett-Packard Company.
Actual prices may vary.) To see how HP's cost
per page compares to other vendors, visit the Printer Comparison Center.
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Colors |
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In
TI DLP (Texas Instruments Digital Light Processing)
technology, color is produced by passing light
through a color wheel, shining through the
color wheel segments as the color wheel spins.
16.8 million colors can be reproduced.
Learn
more
After
light is passed through the color wheel, the
light is then deflected through a single TI DLP
chip that contains thousands of tiny mirrors.
The light combines on the screen to produce a
colored image.
The colors found in HP digital projectors have
consistent and accurate color because of the
inherent reliability of the DLP technology. Additionally,
HP has created new color wheel designs, color
tables, and algorithms to provide the optimal
combination of brightness and color to fit the
projection environment and the content being
presented.
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Connectivity |
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The
ability to connect a projector to different
source devices using device-specific cables.
Learn
more
HP projectors are capable of connecting to
a variety of devices, such as PCs (Desktop,
Portable, Handheld, and Tablet), DVDs, and
VCRs. The HP xp and vp series products, for
instance, have a large number of input connections
for connecting multiple devices simultaneously
(e.g., PC, monitor, and a VCR for teaching).
Moreover, all HP projectors are “smart,”
meaning they can adjust brightness, contrast,
color depth, and other image properties to
create the perfect image, regardless of input
device – automatically, and without operator
assistance.
HP products are tested using various PCs, DVDs
and VCRs, and designed to support the new TV
standards: SDTV (480i), EDTV (480p), and HDTV
(720p and 1080i).
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Contrast |
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The
difference between the white and black the
projector can project; also referred to as
the contrast ratio. The ratio is the measure
of the projector’s brightest white divided
by the projector’s darkest black. A high ratio
means a clear and sharp display that can offset
the damaging effects of ambient light in a
room. For color, the greater the contrast,
the greater the depth of color and richness
of shadow detail.
Learn more
Because DLPTM projectors absorb light more effectively
than LCD projectors, they can provide a higher
contrast ratio, resulting in deep black tones
and details in video and graphics. HP continues
to provide imaging algorithms that enable HP
projectors to boast contrast ratios 200% higher
than previous generations, and contrast ratios
continue to rise. The vp6320, for example, has
a category-leading 2500:1 contrast ratio.
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Keystone
correction |
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Also
called horizontal and vertical keystone correction;
the most typical adjustment is to vertical
keystone correction. This means that when an
image is projected upwards it creates a trapezoidal
image shape; vertical keystone correction then
squares the image. If an image is projected
from the side, a combination of vertical and
horizontal keystone correction is required
to square the image. Keystone correction requires
images to be rescaled, which can have a minor
effect on some elements in the projected image.
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Lens |
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The
dimensions of the projector lens determine
the length of the projection beam required
for a projector to produce an image of a desired
size. A lens can also increase or decrease
the size of the image projected onto a screen;
indirectly making images appear to be in or
out of focus.
Learn more
Learn more There are three general types of lenses:
long- and short-throw; and wide-angle. A long-throw
lens is used on projectors that are installed
far away from the projection screen. Short-throw
lenses are used on projectors that are centered
and not placed too far away from the screen.
A wide-angle lens can project a very large image
from just a couple to a few feet away from the
projection screen.
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Light
source |
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The
light source in a projector is derived from
a bulb, also called a lamp. The intensity of
the light is determined by the power it consumes:
a high watt measure (300-watt) produces a brighter
and hotter light. HP projectors use different
size lamps ranging from 120- to 210-watt lamps.
A lamp has a definitive life-span (measured
in lit hours) and the brightness of the lamp
diminishes over time.
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Power
consumption |
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The
maximum energy a projector will use, measured
in watts.
Learn
more
Many projectors have a standard mode and
an economy or low-wattage mode, with the
standard mode requiring more energy to run
but also producing brighter image.
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Projection
distance |
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The
maximum distance a projector can be from a
screen and still cast a usable image in a dark
room.
Learn
more
If
you are purchasing a projector to install
permanently or semi-permanently in a room,
be sure to measure the distance from your
planned projector location to your planned
screen location so you can choose a projector
with the required projection distance capabilities.
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Versatile
projectors |
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Designed
for placement in boardrooms and classrooms
with 2 to 50 participants and flexible lighting
conditions. Weighing approximately 4 lbs, these
projectors are mobile enough to be shared by
different workgroups.
Learn
more
Onsite
projectors offer the best combination of performance,
features, and price.
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Zoom
capability |
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Optical/manual
or digital zoom is a feature on standard, long,
and short throw lenses. The zoom feature allows
images to be increased or decreased on the
screen.
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Connectivity |
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Connecting
a scanner to a host computer using either a
serial, parallel, or USB cable for communications.
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Maximum
scan size |
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The
physical horizontal and vertical dimension
of an original document or image that can be
scanned based on the size of the scanner.
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Scan
input |
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The
different destinations or applications a scanner
supports for scanned documents. In addition
to scanning a document or picture directly
to a file system, many HP scanners offer featuers
that allow you to scan directly to e-mail or
make a copy of the scanned image. In addition,
several scanners may support TWAIN scanning
so you can scan images directly into TWAIN-compliant
applications like Adobe Photoshop.
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Scan
resolution |
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Resolution
determines the size of the image to be processed.
Low resolutions are used for Web content. High
resolution (300x300) should be selected for
professional printing.
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Scanner
type |
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Scanners
are available in different sizes for different
purposes: flatbed, hand held, photograph (no
slides or negatives), transparency scanner
(slides and negatives only), and photo scanner
(photographs, slides and negatives).
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Task
speed |
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The
speed at which an original can be scanned and
placed within a software application.
Learn
more
For
example, less than 15 sec: 4 x 6-in color
photo into Microsoft Word; less than 33 sec:
OCR a full page of text into Microsoft Word;
less than 18 sec: e-mail photo.
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