Thank you for your questions.
Necom wrote:Thanks for the anwser but it didn't really helped me ... sorry..
Sorry for misunderstanding. In the combo boxes on the Number of pixels panel maximum number of pixel is 1648. But it is not limit, you can enter any value from keyboard.
Here is some information about camera parameters and modeling.
Let's divide camera modeling in 3 levels according to your need, knowledge and available information.
Level 1. Simplest basic level. Modeling view area only. In manufacturer specification there are all necessary information.
On the first level you should specify:
a) Image sensor format=1/2inch
b) Lens focal length - specify according to lens model. In case of varifocal lens you can specify min and max focal lengths. Then you can change focal length in the specified limits.
Necom wrote:there is NO Lens specification cause its ONLY the box camera.. There is a lot of different lenses to choose from so i have
In this case don't specify lens parameters. Lens parameters can be specified separately for each camera of this model.
Or create several camera models with different 'Model Name' and different lenses.
c) Aspect ratio - specify according to camera setting, as your camera has adjustable aspect ratio. For more accuracy you should specify directly size of active area of image sensor, but camera manufacturer doesn't give the data in specification.
In many projects the first level is sufficient. You can model view area projections and 3D image from camera in different positions. Camera resolution and sensitivity is not taken into account on the first level. VideoCAD Lite offers only the first level of modeling.
Next levels of modeling require more information and better understanding.
These levels can be needed for particular cameras in project.
Level 2. Modeling image quality. Specified image resolution allows to model Person detection, identification, License plate reading areas.
On the second level you should specify in addition:
a) Number of pixel on the image sensor
b) Camera resolution (TVL) (optional).
Necom wrote:For me it seems that a lot of the information that is needed in VideoCad Camera specification is regarding Analog types..
There are no big differences between analog and IP cameras in modeling in VideoCAD. All cameras have the same parameters: View angles, Aspect Ratio, number of pixel, resolution, light sensitivity...etc.
Necom wrote:an example is the TVL box.. a IP megapixel camera does not have TVL specs an so on !!!
Though TVL is not gived in megapixel camera specification, the parameter is important for megapixel cameras too. TVL resolution depends on lens resolution and image processing. Bad lens resolution can corrupt a lot of megapixels.
In case of using megapixel lenses specify Camera resolution=0.7*Horizontal number of pixels or don't specify camera resolution.
See: Help system>Examples of work with VideoCAD>Example 12 Measuring camera resolution
c) You can also specify image processing parameters on the Processing tab on the Image parameters panel. There is this possibility as image quality depends not only camera parameters. For example Compression level has big influence on the image quality. Image processing parameters apply for each camera in the project, not for camera models.
See "Help system>Examples of work with VideoCAD>Example 6 Determining person identification criteria by a real image" for understanding image quality modeling.
See also the article
The principles of CCTV design in VideoCAD. Part 2. Person detection area, person identification area, license plate reading area"(*.pdf, 1112kB)
Level 3. Modeling light sensitivity.
Necom wrote:I lot of the information that needs to be typed in is not listed on IP Megapixel camera spec from various vendors !!
As a rule manufacturers don't give correct sensitivity parameters to use them in modeling.
VideoCAD offers tools for modeling but it can't obligate camera manufacturers to give all necessary parameters. You can get some parameters by your own tests. VideoCAD offers a technique for measuring camera sensitivity.
See "Help system>Examples of work with VideoCAD>Example 10 Measuring camera sensitivity
Please see the article for details how to model sensitivity and illumination.
"The principles of CCTV design in VideoCAD. Part 4. Illumination and camera sensitivity in CCTV"(*.pdf, 1950kB)