| 摘要 |
The present invention relates to a device and a method for extracting physiological information from detected electro-magnetic radiation emitted or reflected by a subject (10). A data stream (30) derivable from electromagnetic radiation emitted or reflected by a subject (10) is received. The data stream (30) comprises a sequence (76; 152) of signal samples (78a, 78b, 78c; 154a, 154b, 154c) indicative of desired subject motion and of disturbing motion, the signal samples (78a, 78b, 78c; 154a, 154b, 154c) representing at least one region of interest (84; 164) and at least one non-indicative motion region (86; 166), the at least one defined region of interest (84; 164) exhibiting an at least partially periodic indicative motion pattern attributable to at least one physiological parameter (56), and a disturbing motion portion. The sequence (76; 152) of signal samples (78a, 78b, 78c; 154a, 4b, 154c) is processed. A sequence (158) of derivative motion compensated samples (80; 60a, 160b, 160c) at least partially compensated for undesired overall motion is derived. At least one characteristic signal (90; 112) at least partially indicative of the at least partially periodic indicative motion pattern is derived from the sequence (158) of derivative motion compensated samples (80; 160a, 160b, 160c). The at least one characteristic signal (90; 112) 1 is processed under consideration of overall motion residue occurring in the derivative motion compensated samples (80; 160a, 160b, 160c), thereby at least one enhanced characteristic signal (98; 116) is generated. |
