D-Link DCS-1100 - mydlink-enabled Wired Network Camera Uživatelský manuál stáhnout pdf (Strana 23)

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Contents

 Resolution

 Compression

 Audio

 Lens Elements

 Image Sensors

 Image Processing

 Light Sensitivity

NTSC and PAL

 Recorded video is composed of scan lines. These lines can be displayed in two ways:

• Interlaced scan

• Progressive scan

 There are two analog video standard resolutions:

• NTSC (National Television System Committee)

• PAL (Phase Alternating Line)

IP Surveillance Essential

• Resolution

D1 720 x 480

4CIF 704 x 480

2CIF 704 x 240

CIF 352 x 240

QCIF 176 x 120

D1 720 x 576

4CIF 704 x 576

2CIF 704 x 288

CIF 352 x 288

QCIF 176 x 144

NTSC Image Resolutions

PAL Image Resolutions

VGA Resolutions

 VGA (Video Graphics Array) is a display system for PC developed by IBM.

VGA resolution is 640x480 pixels with 16 or 256 colors which is usually

used by non-megapixel camera.

 All PC display adapters support VGA resolution thus VGA resolution is

suitable for network camera because square pixels in the video image

produced by the camera match the square pixels on the computer screens.

Display Format Pixels

QVGA (SIF) 320 x 240

VGA 640 x 480

SVGA 800 x 600

XVGA 1024 x 768

4x VGA 1280 x 960

SXGA 1280 x 1024

IP Surveillance Essential

• Resolution

Megapixel Resolution

 Pixel is a tiny square of color, the smallest component of a digital image.

One megapixel consists of a million of individual pixel.

 A camera with megapixel resolution has a megapixel sensor that can

produce an image using a million or more pixels in it.

 The more pixels a sensor has, the more details and higher quality the image

can be produced.

 Details of image produced by the camera is one of the most important

aspects in surveillance system.

Display format No. of megapixels Pixels

SXGA 1.3 megapixels 1280 x 1024

UXGA 1.9 megapixel 1600 x 1200

IP Surveillance Essential

• Resolution

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 32 33

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