Although this lesson has not been explained in the class we compiled since the summary had already previously.

1.1.2.3.3.Digital kamera.


A digital fotokamera draws pictures and stores them in digital form. The individual images are usually on the pc, where they are processed, stored and printed.
Important selection criteria for digital camera:

-Resolution.
-Compression.
-Length.
-Zoom.
-Picture capacity.
-Lcd-monitor.
-Interface.

Digital camcorder:

When recording with dv-camcorder are two important things: One is the recording sensor supplied by the picture digital This means that a special chip in the camera, the colors and speed lim every single point in the video image into a pay values translated. Since the quantity of such data videofilmes with his 25 pictures per second, however, would be too high for them to the relatively small and slow in the current magnetband dv-kassette disk, you will not only pay for conversion into digital values But simultaneously a compression of images.
These cameras have:
-Resolution: The digital video images from a dv-kamera bestteht from 720 * 576bild points, for a total of 414,729 pixels.
-CCD-anzahl: Most of your camcorder for the amateur range ccd-sensor have a few models in the area have opposed semi over 3 ccds.

Webcam

A webcam is a video camera, which happens to komminikation used the internet.




1.1.2.4.Acoustic input


The processing of audio information is similar to that of image over informationen.Diese task usually the computers a sound card, but when the analog input to digital information is converted and in a rückum wandlung issue.
The processing of naturally spoken speak divided into two part resort:

-Spracher identification: It should be noted, was speaking wurde.bestimmte muster by comparison must recognize and be processed.

-Identification sprecherer this involves the investigation who spoke. The basis of the language sounded bildes we checked who the speakers.











1.1.3. From relea


1.1.3.1. Bildchirm


The bildchirm is one of the most commonly used ausga begeräte, the data are used for the eye temporarily visible on screen. In order for the monitor knows what he represented, he gets his signals from the graphics card in the pc as picture signals and synchronisations signals, which the vertical and horizontal control Aurich Tung

The main male merk schimkarte are the picture resolution, bit depth and performance of analog digital-wanslers

Today monitors use different techniques to display images from the characters; As cathode ray tubes, liquid crytall displays (lcd) us plasma screens.


Kathoden beam tube (ctr): it is the most common used anzeige.die crt is a vaku to glasröhre electrons with a gun on one side and a materials coated with phosphorescent screen on the other seite.wir electrons gun at the electrical voltage applied, creates a electrons flow, bundled into a beam.

Liquid crystal display (LCD):In enclosed glass surfaces substances get through a voltage other optical properties, it is between light transmittance and light changed, allowing the viewer a controlled pixel light or dark.
Control is generally through a matrix of electrodes, but it can also use laser beam heats the liquid crystals, and thereby increase the polarization behavior changed. LCD screens are very shallow water, have a low weight and low power consumption.
In LCD-Schirmen active, the individual pixels on thin-film individually activated. The result is a spicy, flicker-free image (even at low refresh rates). The color calibration for the printing technology is hardly possible.


Plasma screen: it consists of two glass plates between which ionized gas (plasma) is included. In one of the glass plates are thin, horizontal energie, in the other glass plate vertical.
Plasma monitors are flat and very easy (for example, is a 53 cm-Bildschirm only 6 cm thick and weighs just a few kilograms)
Plasma screens are still expensive, have a high power consumption, as compared with cathode ray monitors a low resolution and colour depth.











Die optische Qualität der Bildschirmanzeige wird durch folgende Faktoren bestimmt:

Bildchirmgrösse: The required size of the screen depends on the specific task. Graphical tasks require a larger screen than tasks, which with text or numbers worked.

Resolution: It is in the horizontal and vertical direction represented the total number of pixels.

Color Display: The display of colors, depending on the ranges used video and graphics cards from monochrome to con millions of colors.

Bildwiederholffrequenz: The image reconstruction wood frequency depends on the post-burn time of phosphorus.
The screen surface: The surface should be possible choices, screen devices are set up so that no barrier or light sources into their clippings. The contrast between characters and background should be freely adjustable and between 1:5 to 1:5.
The higher the resolution, color depth and refresh rate, the greater are the demands on the graphics card.


1.1.3.2.DIGITALPROJEKTOREN .

The development of LCD projectors similar to that of slide projectors, instead of a slide, a backlit LCD panel and with the help of a lens projected on the wall. This one makes you look at the effect of the birefringent optical effect of the liquid crystals when a voltage to use.
Established data projectors for the presentation of computer and video images, but also in the entertainment electronics find it more and more.
The quality of the projector is determined by the brightness of the resolution, as well as equipment such as interfaces, as Zusatzaeinrichtungen laser pointer, speaker.
Looking at the trends in the graphic output, it shows a tendency for one reduction in the form of so-called Microdesplays project.
On the other sides tries, three-dimensional objects on display screens.


1.1.3.3. PRINTERS


Printers are output devices that are visually represented data on print makers spend. By contrast, the production data visually legible. It distinguishes between attack printers and stop free printers. Stop pushers bring the color by mechanical shock to the paper. The impact printer without mechanichen attack, they are much quieter, but no blueprints.








Thermal printer
Wärmeempfindliches paper is a matrix of Heitzstäben to the respective agencies erwämt. The paper wärmmeemppfindliche reagiertr to mechanical pressure and is not filing for longer suitable.

InkjetPrinters

For small jets will be in a matrix, or by direct diversion of the jet ink on an absorbing paper axes. The advantage of inkjet printers is an almost silent operation with good quality printing in color. The print speed is between 2 and 20 pages per minute.

Laser Printers

The operation is similar to a photocopier, the print quality of laser printers is very good, the printing speed is very high.

Color Laser
The laser printing with full-color, as in the offset printing with four colors and requires four printing stations to raise the toner to the print medium.