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To ensure the correct recognition of personal protective equipment, you must meet the following image requirements

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:

1. The detected object

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1. (PPE)

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1. must be clearly distinguishable by the human eye.

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1. Image isn't noisy and

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1. isn't distorted by compression algorithm artifacts.
2. The width or height of

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1. equipment

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1. must not exceed 75% of the frame size.
2. The duration of the object's visibility is at least 3-8 frames. The minimum number of frames depends on the solved task.
3. There

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1. must be no visible physical barriers between the camera lens and the analyzed object.

2. The minimum value of pixel density per meter is observed:

   Image resolution	Object type	Minimum pixel density per meter (ratio of

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1. objects width in pixels to

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1. object width in meters)	Minimum object size in pixels, Width x Height
   1920x1080	Human	170	~102x309
   1280x720	Human	128	~77x233
   640x360	Human	80	~48x145

2. The minimum dimensions of

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1. equipment on the body areas in pixels are observed. An example of equipment dimensions for

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1. the 1920x1080 resolution

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1. :

   1. Upper body (torso) 75*100.

   2. Legs 75*105.

   3. Head 60*65.

   4. Hands 65*60.

   5. Feet 45*40.

   6. Set of equipment 165*295.

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