CCTV Design Lens Calculator

Pixel density tab

 Additional features

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Pixel density tab

 Additional features

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Pixel density tab

 Additional features

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Changing picture

Fixing resolutions or distances

Editing resolutions and distances

Digital ZOOM

Screen

 

 

 


 

Changing picture

 

You can change picture to visualize the Pixel density and Field of view in the Table of regions and on the Screen. Use the Main menu>View>Pictures item. Or similar items in the pop-up menu of the Table of regions or Screen.

 

When modeling pixel density using pictures, the simulated pixel density can not exceed the pixel density of the pictures.

 

 

 

 

       How to add your own pictures

 

Table of regions can display any images in *. jpg format, for example: photos of objects, etc. Adding your own images you can see how your objects will look at the far bounds of regions.

 

To add your own images to the Table of regions:

 

1. Take any *.jpg file, digital photo image etc.

 

Simulated pixel density can not exceed the pixel density of the object on the used picture, so the pixel density of the object on the picture should be sufficient. The object should take the greatest possible part of the picture and the picture resolution should be sufficient.

 

2. Name your file by the following composite name: <anyname>,<W>,<H>,<CX>,<CY>.jpg

 

Thus the name is a string composed of the comma separated values:

<anyname> - any string without spaces and special characters;

<W> - image width, in meters;

<H> -  image height, in meters;

<CX> - X coordinate of a spot on the image, at which the camera should be pointed (in meters);

<CY> -Y coordinate of a spot on the image, at which the camera should be pointed (in meters);

 

Origin of coordinates is on the top left corner of the image.

 

Example of file name: people,2.67,2,1.335,0.177.jpg

 

3. Put your file in the CCTV Design Lens Calculator installation directory, /Resolution samples/ folder.

You can place several files to this folder.

 

4. After that you can choose you picture in the Main menu>View>Pictures and pop-up menu of the Table of regions and the Screen.

 

If your file is missing in the menu, then you probably made a mistake in the filename. If the file is displayed not correctly, you probably typed wrong values of sizes in the filename.

 

 

Fixing resolutions or distances

 

As a result of changing the camera parameters ( lens focal length, sensor size, aspect ratio, vertical number of pixels), parameters on the Pixel density tab will be recalculated.

Two ways of the recalculation are possible: recalculating distances at which the image from the camera will have a fixed value of pixel density, or recalculating the pixel density at fixed distances.

Using the Main menu>Fix items you can fix pixel density thus the distances at which the image from the camera will have the fixed value of pixel density will be calculated. Or you can fix distances thus the pixel density at the fixed distances will be calculated.

 

Editing resolutions and distances

 

CCTV Design Lens Calculator allows to edit the values ​​of distances and pixel density in the Table of regions on the Pixel density tab.

You can enable editing by Main menu>Edit items.

The same result can be obtained by clicking on any of the resolution or distance value in the Table of regions. Clicking on empty space of the table turns off editing.

 

 

When editing resolutions - the distances are recalculated, when you edit the distances - the resolutions are recalculated. The rows in the Table of regions are independent, in fact, in the Table there are 5 independent calculators of field-of-view and pixel density with the ability to generate independent models of images.

 

Digital ZOOM

 

Using the Digital ZOOM slider you can magnify images with real resolution in the Resolution column of the Table of regions and in the particular view (small image) on the Screen.

 

As a result of the digital ZOOM the real image resolution is not changed.

 

Screen

 

Images on the Table of regions are small, so you can quickly evaluate the Pixel density and the Field-of-view size at various distances.

In addition, it is possible to show any image in any size for more detailed consideration.

For this purpose there is a separate scalable window - Screen on which you can display an image from any region in the Table of regions.

 

See more. Screen