Abstract Background To establish reference ranges of fetal facial profile markers and study their correlations with crown-rump length (CRL) during the first trimester (11 ~ 13 + 6 weeks’ gestation) in a Chinese population. Methods Ultrasonographic images measuring nuchal translucency (NT) were retrospectively selected randomly normal fetuses whose parents both Chinese. The included inferior ang...

This paper describes the extraction of the facial profile from a frontal view to provide a measure for automatic face recognition. The profile is derived from the intensity projection of the face image and is described using the Walsh power spectrum. Results have demonstrated its potential as a measure for face recognition whilst it remains relatively immune to head movement and to small change...