Guidelines for cameras 
===========================


Cameras’ location
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For better |ProductName| work please follow recommendations listed below:

#. Mount cameras in indoor spaces with soft and steady light. 

#. Try to mount cameras at eye level, if possible.

#. Mount cameras on center above the attention object. For example, if you mount a camera on a screen then place it on center of its the upper bound. If the screen’s upper bound is significantly higher than the eye level then place the camera on its  bottom bound. 

#. Point the camera at the main stream of people.

#. Securely fix the camera, use double-sided tape if necessary. 

#. While mounting camera avoid:
	
	* light-struck background since it can cause picture fading;

	* hard light directed to the camera. In this case faces will be lit from one side only and will have dark spots that may affect the quality of detection; 

	* dark indoor spaces;

	* any element causing visual anomalies (such as glare on a window). If you are planning to measure the number of storefront views then we recommend you to place the camera right in front of a storefront. 

.. figure:: _static/img/alarm_image2_blank.jpg

Video resolution
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For the best |ProductName| performance we recommend you to use cameras with 1280*720 definition.In the following shedule you will find recognition range (in meters) for different devices and cameras.

.. table:: Maximum recognition range for different devices and cameras Logitech C270/C310 Logitech C910/C920 (in meters)

   =========== =========== =========== =========== ===========
    .             Logitech C270/C310     Logitech C910/C920  
                (narrow-angle cameras)  (wide-angle cameras)
   ----------- ----------------------- -----------------------
      Device     1280x720    640x480     1280x720    640x480
   =========== =========== =========== =========== ===========
    Minix 8      5.0-5.5     3.0-3.5     3.0-3.5     2.0-2.5
    Minix 7      4.5-5.0     3.0-3.5     3.0-3.5     2.0-2.5   
    Minix U1     5.0-5.5     3.0-3.5     3.0-3.5     2.0-2.5
    MXQ          4.0-4.5     3.0-3.5     2.5-3.0     2.0-2.5
   =========== =========== =========== =========== ===========