A total of five scores were calculated: the original BCS, the Facial BCS, and three subscores (the BCS appearance-of-face, the BCS function-of-face, and the BCS whole-body-without-face. All the scores showed good internal consistency reliability [ 30]. A validated Dutch version of the original BCS is available [ 3].
The appearance of faces changes when captured under unconstrained conditions due to variations in pose, scale, illumination, occlusion, blur, etc.
In the current study, the participants preferred oxygenated to deoxygenated blood colour when optimising the healthy appearance of faces.
The healthy appearance of faces is enhanced by increased blood colouration in this study, suggesting that participants interpret skin blood colouration as a cue to underlying health.
Quite the opposite, you would need a control class that has as much as possible from the 'faces' class except the appearance of faces, probably several classes of distorted faces as well as your present control.
Occlusions can greatly change the appearance of a face, and an upright face detector will easily fail to detect such faces.
A possible way towards improved clustering performance is to analyze visual appearances of faces in specific contexts and take the contextual information into account when designing the clustering algorithm.
It is also found from this figure that if the appearances of faces are very similar, then the negative pairs can be wrongly identified.
Moreover, the appearance of their face when they push the skin of their face back is not necessarily what the result will be.
