Axis 2400+ Uživatelský manuál stáhnout pdf (Strana 29)

The raw image data from an image sensor must be

processed in order to achieve a good image, i.e. the

color must be trimmed, the edges must be sharpened,

the exposure must be controlled, and the white balance

must be adjusted. These functions are all driven by the

Digital Signal Processor (DSP).

The image compression should be made in hardware

to achieve a high frame rate. It is important that the

compression is made without losing the color levels and

the details in the images.

Sony ExView HAD CCD-sensor, 1/3".

Monochrome, IR sensitive version.

(Used in AXIS 2420 IR)

1.0

Visible Light Invisible IR Light

Relative Sensitivity

0.6

0.0

0.2

0.4

0.8

400 500

Wave Length (nm)

700600 800 1000900

Typical low end CMOS-sensor, 1/4".

Used together with an IR-filter.

Typical high end CMOS-sensor, 1/4".

Used together with an IR-filter.

Sony ExView HAD CCD-sensor, 1/3".

Used together with an IR-filter.

(Used in AXIS 2120 and AXIS 2420)

Sony Super HAD CCD-sensor, 1/4".

Used together with an IR-filter.

(Used in AXIS 2100 and AXIS 2110)

Comparison chart displaying the relative sensitivity and wavelength for different sensors. Generally, black and white sensors are more sensitive than color

sensors; CCDs are more sensitive than CMOS-sensors.

A 1/3” CCD.

A 1/4" CMOS-sensor.

C AMERA BASICS

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