Cluster Analysis of IR Thermography Data for Differentiating Glass Types in Historical Leaded-Glas Windows  
[PERSON]  
1 [PERSON], University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]  
2  
[PERSON]  
1 [PERSON], University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]  
2  
[PERSON]  
2A, University of Antwerp, Groenenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [EMAIL_ADDRESS] (K.J. ); [PERSON].V.d.S.) 2  
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3  
[PERSON]  
1 [PERSON], University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [EMAIL_ADDRESS] (K.J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [PERSON] (K.J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [EMAIL_ADDRESS] (K.J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [PERSON] (K.J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [PERSON] (K.J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [EMAIL_ADDRESS] (K.J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [PERSON] (K.J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [EMAIL_ADDRESS] (K.J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [PERSON].J. ); [PERSON].V.d.S.) 3  
[PERSON]  
1 Op3 Mech, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium; [EMAIL_ADDRESS] (Y.D. ); [EMAIL_ADDRESS] (G.S.) [PERSON]S] (S.L. ); [EMAIL_ADDRESS] (G.V.d.S.) [EMAIL_ADDRESS] (S.L. ); [EMAIL_ADDRESS] (G.V.d.S.) [EMAIL_ADDRESS] (S.L. ); [EMAIL_ADDRESS] (G.V.d.S.) [EMAIL_ADDRESS] (G.V.d. IRT was initially developed as an inspection method for industrial applications [1], but was soon introduced in the conservation science field as it is a non-destructive and contactless inspection technique. In this area, IRT has distinguished itself as a reliable and sensitive standoff method for defectoscopy and structure studies in works of art [2; 3; 4]. More particularly, IRT has been used for detecting various types of defects in wood and panel paintings [5; 6], frescoes and mosaics [7], historical buildings [8], and ceramics [4]. In addition, it is employed to visualize hidden aspects of artworks such as painted representations [2; 3; 9], the wood grain in panel painting [3; 9] and cusping of canvas [9; 10]. The advantage of IRT in comparison with other non-destructive diagnostic techniques commonly employed in heritage science, such as Macro X-ray fluorescence (MA-XRF) [11; 12], hyperspectral imaging [13; 14] and Raman spectroscopy [15; 16], lies in its ability to image a large area in a short amount of time. However, a notable limitation is the fact that different materials can exhibit similar thermal behavior and thus will be indistinguishable from each other.