Non-touch optical detection of vital signs from variation amplification subsequent to multiple frequency filters

An apparatus of motion amplification to communicate biological vital signs, the apparatus comprising:

• a skin-pixel-identifier that identifies pixel values that are representative of skin in at least two images;
• a first frequency filter that is operably coupled to the skin-pixel-identifier and that applies a frequency filter to output of the skin-pixel-identifier;
• a spatial clusterer that is operably coupled to the first frequency filter and that applies spatial clustering to the output of the first frequency filter;
• a second frequency filter that is operably coupled to the spatial clusterer and that is applied to output of the spatial clusterer, generating a temporal variation;
• a vital-sign generator that is operably coupled to the second frequency filter that generates at least one vital sign from the temporal variation;
• and
• a display device that is operably coupled to the vital-sign generator that is operable to display the at least one vital sign.