Axis Technical Presentation

. . . M A K E Y O U R N E T W O R K S M A R T E R

Axis Technical Presentation

Ian Qvist

Agenda

Advanced Technical Presentation

•Introduction Axis 205 DNS function

•Introduction Camera Electronics and Optics

•HTTP – API command set

•Customized Web page with Axis Camera

•I/O control

•Scripting possibilities in Axis Camera

AXIS Dynamic DNS

AXIS Dynamic DNS

AXIS Dynamic DNS

Camera Electronics and Optics

Compression CPU

Flashmemory

DRAM

EthernetInterface

Camerafunctions

Lens Optical filter Image sensor

Introduction to cameras

A video sensor (CCD or CMOS) capture the light to create an electric signal

CCD size comp.

to:H=12.8V=9.6D=16

1"H=8.8V=6.6D=11

2/3"

H=6.4V=4.8D=8.0

1/2" H=4.4V=3.3D=5.5

1/3" H=3.2V=2.4D=4.0

1/4"

1/5 1/6”

CCD size

CCD size reduction helps: Smaller cameras because of smaller optics Reduction of sensor price Sensitivity constant or increased

CCD size reduction is helped by: Improvement of manufacturing processes

Clean rooms

CCD technology Hyper HAD OCL

Sony Micro lens technology improved sensitivity and reduced smear

80-100%of light captured by pixel -30dB Smear

+100% sensitivity compared to HAD

1 CCD Camera

Colour CCD

Each Pixel has a Colour Filter

B/W CCD

Lens, first in the camera

Optics – Lens• f value is specifying the field of view, trough above

formula we can calculate what f value we need• F is the value of the iris and is telling us how light

sensitive the lens is, number should be as low as possible

Let´s build a Camera

IR-Filter• Is letting visible light go through and is stopping IR.• In a color camera there is always IR filter but

normally not on b/w. Day and night color cameras is changing between day and night by taking the IR filter on or off.

IR-filter


Image Sensor• On high quality cameras the sensor is a CCD on low-

end it´s C-MOS• 752x582 is the amount of pixel and it is not equal to the

resolution but, it is the maximum theoretical resolution so it have substantial impact on picture quality, should be as high as possible

IR-Filter CCD


AGC (Automatic Gain Control)• If there is not enough of light, this circuit will amplifying

the signal to a sufficient level. This is making the picture brighter but have a disadvantage in increase noise

• Function is normally automatic but in more advanced cameras it can be switch off

IR-Filter CCD AGC


A/D converter• Signal from CCD is analogue and AGC have to be

analogue but from now on the signal will be digital trough Analogue/Digital conversion

IR-Filter CCD AGC A/D converter


Digital Signal Processor• Control: Iris, Shutter, AGC, White balance, Back

light compensation• Create the color• Making picture artificial sharp by Detail

IR-Filter CCD AGC A/D converter DSP

Iris


Memory• Is keeping the picture until it is ready to be send


D/A converter

Video out

Memory

Iris


Ethernet interface• Is where the data is packed for TCP/IP


D/A converter

Video out

Memory Ethernet interface

RJ45 TPIris

Let´s build a Camera. However!!!

AXIS using it´s core technology to make network cameras.

• ARTPEC • ETRAX, (Ethernet Token Ring, Axis)

ARTPEC ETRAXIR-Filter CCD

RJ45 TP

AGC A/D converter DSP

Compression

Ethernet interfaceIris

Memory

HTTP – API introduction

HTTP commands, Web design

•Understand camera HTTP commands.

•Seek HTTP command in manual and use these.

•Understand HTML structure.

•Make own HTML Web page.

•Construct own camera Web page on Web Server.

•Construct own camera Web page placed in camera.

•HI-HIT Web server

HTTP command in URL

URL address

HTTP command with parameters

? = delimiter to parameters & = delimiter to the next parameter.

Compression = 0 no compressionCompression = 100 max compression

HTML commands

http://www.w3.org/MarkUp/Guide/

<html>

<head> <title>New Page 1</title> </head>

<body> your code here </body>

</html>

HTML tags

title>My first HTML document</title>

<h1>An important heading</h1> <h2>A slightly less important heading</h2>

<p>This is a paragraph.</p>

<img src=“axis.jpg" width="200" height="150">

This a link to <a href=“my_page.html">My best page</a>.

<font color="#FF0000">hello in red</font><b> bold </b> <br> = new line

Camera Web page

1. Go to demo

2. Right click on white area

3. Click Source

Camera Web page HTML code

Enter camera IP address

You may change as you wish

Only camera resolution to be given

HI – HIT Web Server

One FTP stream

Thousands connectionsto Internet

Read the entire manual on following link:http://www.axis.com/techsup/cam_servers/tech_notes/live_video_iis.htm

HI –HIT configuration

Create the image directory on the Web server.Example: c:\inetpub\ftproot\liveCreate a Web Server alias (virtual directory) and use this as the image path in the Web pageExample: http://[WebServer]/live/

Get the LiveImg.dll and copy it to the "execute" directory in your Web server file tree (typically c:\inetpub\wwwroot\cgi-bin if you are using Microsoft IIS/PWS).

a) Configure Web Server

b) Configure Camera to FTP transfer

HI – HIT modification of Camera stream

Change these Parameters in your HTML code:

path: The image path (i.e. /live/image.jpg).fps | fpm: Frames/second or frames/minute.duration: For how many seconds the images should be pushed to the client.timeout: The image feed stops after timeout seconds if the image has not been updated.

Examples:Deliver 3 images/second during 60 seconds. Stop after30 seconds if the image has not been updated (default parameter values):http://<web_server>/cgi-bin/liveimg.dll?path=/live/image.jpg

Axis Camera I/O Control

Layout with I/O control

Layout with Output Buttons

HTTP I/O

Check Input

Activate Output

Note: camera returns status -> web browser get white

Scripting in Axis Camera

File system and memory

/ (root)

bin/

dev/

var/ (/tmp/var)

tmp/

etc/ (/mnt/flash/etc/)

usr/

mnt/

proc/

lib/ROMFS (read only)bin/ – built-in applicatinons, executeable filesdev/ – device fileslib/ – C-libraries used by applicationsproc/ – process informationusr/ – built-in web pages, cgi’s, scripts

JFFS (read/write)Configuration files, task.list, custom scripts, custom web

RAMFS (read/write)Temporary files, image buffer

Built-in editor – editcgi

http://<IP address>/admin-bin/editcgi.cgi?file=<file>

Edit files, create new files, browse the file system

FTP and telnet

FTP Get files Put files Set permisson on files (chmod 755)

Create directories

Telnet (enable telnet in the file /etc/inittab)

Run scripts/applications Run shell commands

Create/delete directories/files Set permissions on files


Built-in applications

Built-in applications – bufferd

Pre-Buffer

Post-Buffer

The pre-buffer is continuously storing images in FIFO-order; whereby the latest image overwrites the eldest

On ’stop’, the pre-buffer stops. The post-buffer is then filled with the pre-specified number of images.

When the last image has been saved a status file is created.

Stop!

Capture images and store them on the RAM-disk (/tmp)

Built-in applications – smtpclient

Send e-mails with attachment

Built-in applications – sftpclient

FTP server

Upload images to an FTP server

Built-in applications – shttpclient

Open an HTTP connection Internally to local host (127.0.0.1) Externally to a remote Web server

Built-in applications – parhandclient

Parameter handler Set parameters Get parameters to a file as different

types

NAMEVALUE:

root.Network.IPAddress=”10.13.17.76”

RAW:

10.13.17.76

Built-in applications – alarm

Send a TCP message to a remote host

Built-in applications – logger

Write messages to a log file

Output example in /var/log/messages:Oct 10 08:13:14 AxisProduct myScript: Up and

running


utask & task.list

utask & (user.)task.list

init

utask

/bin/utask

/etc/task.list/etc/user.task.list

Trigger appTrigger script

/etc/inittab

Task scheduler

Task.list – events

Trigger the script or application ... by time by date by boot by digital input by motion by video input (video servers)


Custom web pages

Custom web pages

Files resident in /etc/httpd/html/ can be viewed from the URL http://<IP address>/local/

boa.conf

Edit the boa.conf file resident in /etc/httpd/conf/

Set the default path to your own filesAlias /index.html /etc/httpd/html/index.htmlAlias / /etc/httpd/html/

Create a CGI directorySriptAlias /local/scripts/ /etc/httpd/html/scripts/

Note! The files resident in the scripts directory must be executable

Questions and Answers

Axis Technical Presentation

Documents

camera web page

html web page

smaller cameras

light compensationcreate

ir filter

visible light

hihit web server http

increased ccd size reduction