Fig. 7
From: Spatio-temporal and -spectral feature maps in photoplethysmography imaging and infrared thermography
Similarity maps of the selection of feature maps of the baby measurement w/o movement: the mean intensity maps are not very uniform. It was harder here to select background regions for the histogram intersection approach. The VIS maps especially suffer from an inappropriate background model. Only spectral flatness highlights the location of the baby for this selection. The spectral flatness map in LWIR is also not visually clean. Nevertheless, low values for the similarity with the background were calculated for the pulsatile region. Hence, the pulsatile region is distinguishable