We can also do this calculation in reverse. And, a 10-megapixel camera, with 3648 x 2752 pixel resolution, provides a 45.6 ft. If we have a 5-megapixel camera with a resolution of 2592 x 1944, then the widest horizontal field of view is 32.4 ft. If the camera resolution is 1920 x 1080 pixels (2-megapixel), then our widest field of view is: = Field of Viewįor the following example, let’s assume you would like to identify the face of a person you already know.
Total Horizontal Resolution / Pixels per ft. The following formula is used to determine the field of view: How wide a field of view can we see and still be able to identify a person’s face? To calculate the widest field of view, divide the number of horizontal pixels (available from the camera) by the pixels/ft. We consider this higher pixel count to be more of a forensic identification than a personal identification. But, if you need to identify a person you don’t know then you need a lot more resolution. (260 pixels/m) to identify someone you know. We determined that if there is good light you will require about 80 horizontal pixels/ft. In a previous article, we discussed the resolution required to identify a person’s face. White paper: Video Management Software for IP Camerasĭetermining the Viewing Area or Field of View.Smartphone Door Access Using Bluetooth Reader.Integration of IP Cameras and Door Access Control and more.Analytic and Specialized Camera Systems.
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