Computer-assisted analysis of painting brushstrokes: digital image processing for unsupervised extraction of visible features from van Gogh’s works

EURASIP Journal on Image and Video Processing

Table 2 Comparison of length measures

Subject (j)	MSPD_λ(j)	r _ah	$r_{hs_mean}$
01	0.01	0.96	0.97
02	0.01	0.96	0.96
03	0.01	0.96	0.96
04	0.07	0.96	0.96
05	0.01	0.97	0.97
06	0.07	0.97	0.97
07	0.08	0.97	0.96
08	0.07	0.97	0.97
09	0.07	0.97	0.97
10	0.06	0.97	0.97
Proposed algorithm	-	-	0.99

Agreement between automatic results and visual observations in terms of mean square percentage distance (second column) and correlation between automatic judgements and visual observations for any given human subject j (third column) and among subjects (fourth column).