Working with Field of View

What is Field of View?

Field of View (FOV) is the area visible to a camera at a given position and orientation. In CCTVplanner, each camera displays a colored cone on the floor plan representing its FOV. This lets you visually verify coverage and identify blind spots before installation.

FOV Cone Visualization

The FOV cone is calculated based on three key parameters:

• Focal length (lens) — determines the horizontal and vertical viewing angle
• Sensor size — combined with focal length, determines exact FOV angle
• Mounting height and tilt — affects the effective ground coverage area

DORI Zones

CCTVplanner can display DORI zones within the FOV cone. DORI stands for:

Adjusting FOV

You can change the FOV of any camera by modifying its settings:

• Change the focal length — shorter lens = wider FOV, longer lens = narrower FOV
• Change the resolution — higher resolution extends DORI zones further
• Adjust the mounting height — higher mounting covers more area but reduces pixel density
• Rotate the camera — drag the rotation handle to point the FOV in a different direction

Verifying Coverage

Use the FOV cones to check for full coverage of your monitored areas. Look for gaps or blind spots between camera FOVs and adjust camera positions or lens settings until the entire area is covered at the required DORI level. Overlapping FOV cones provide redundancy — important for critical areas like entrances and cash registers.