The data consists of 
	1) Faces, in three versions within three folders
		a) Original face
		b) The face with the background (i.e. context ) removed
		c) The face with the background, mouth and eyes removed
	2) Data for each face (both files contain the same data, just in a different format)
		a) in faces_data.xlsx and 
		b) in faces_data.csv 

The data contains the following columns:

year			The year in which the painting was created, provided by the gallery
painting		The string used to identify the painting
facenumber		The index of the face number, e.g. a value of 1 means this is the first face for this painting, 2 means this is the second face within this painting etc.
collection		The gallery from which the painting comes from, see below for keys
pixelsize		The size of the face within pixels
age			The age of the faces, as predicted by the Face++ network
gender			The gender of the faces, as predicted by the Face++ network
pitch			The pitch of the faces, as predicted by the Face++ network
roll			The roll of the faces, as predicted by the Face++ network	
yaw			The yaw of the faces, as predicted by the Face++ network
Mean-Lum		The mean of the luminance of the face, from a LCH color space
Var-Lum			The variability of the luminance of the face, from a LCH color space
Skew-Lum		The skewness of the luminance of the face, from a LCH color space
Kurt-Lum		The kurtosis of the luminance of the face, from a LCH color space
Mean-Chro		The mean of the chroma of the face, from a LCH color space
Var-Chro		The variability of the chroma of the face, from a LCH color space
Skew-Chro		The skewness of the chroma of the face, from a LCH color space
Kurt-Chro		The kurtosis of the chroma of the face, from a LCH color space
Mean-Hue		The mean of the hue of the face, from a LCH color space
Var-Hue			The variability of the hue of the face, from a LCH color space
Skew-Hue		The skewness of the hue of the face, from a LCH color space				
Kurt-Hue		The kurtosis of the hue of the face, from a LCH color space
filename		The filename of the face image, which can be found in each of the three image folders
width ratio		The ratio of the width of the face relative to the width of the entire painting
RGBVolume		The volume of the pixels within an RGB color space
ABSurface		The volume of the pixels within an AB surface place within an LAB color space


The collections:

SwedenNational		NationalMuseum				https://www.nationalmuseum.se/en/
Metropolitan		The Metropolitan Museum of Art		https://www.metmuseum.org/
NGA			The National Gallery of Art		https://www.nga.gov/
Prado			Museo Nacional del Prado 		https://www.museodelprado.es/en
Rijks			Het Rijksmuseum 			https://www.rijksmuseum.nl/en
Getty			The J. Paul Getty			https://www.getty.edu/museum/
