Fig. 1. Flow chart of flame foreground extraction

Fig. 2. Comparison of results obtained by single-color model and proposed method. (a)(f)(k) Original images, (b)(g)(l) images obtained by RGB model; (c)(h)(m) images obtained by HSI model; (d)(i)(n) images obtained by Fuzzy Re-fusion of double-color spatial model; (e)(j)(o) images obtained by proposed method

Fig. 3. Proportions of Cb and Cr component values. (a)(d) Flame; (b)(e) flame analogue; (e)(f) without flame

Fig. 4. Basic structural diagram of PNN

Fig. 5. ECM-PNN training fitting result

Fig. 6. ECM-PNN test result

Table 1. Comparison of test data of different algorithms