| 主权项 |
1. A device for extracting information from detected characteristic signals, comprising:
an interface for receiving a data stream comprising a sequence of image frames derivable from electromagnetic radiation emitted or reflected by an object, the data stream comprising a continuous or discrete characteristic signal including physiological information indicative of desired object motion, the physiological information being representative of at least one at least partially periodic vital signal, and an extractor means for extracting the physiological information from the data stream by: determining a disturbance-reduced element having a predetermined orientation substantially aligned with a reference motion direction, by extracting a motion indicative component from each of a subset of the image frames, determining a characteristic index element from each motion indicative component in accordance with the alignment of the motion indicative component associated with the disturbance-reduced element, and combining the characteristic index elements to form a derivative signal for generating a set of physiological information indicative of the at least one at least partially periodic vital signal. |
