基于Sentinel-1和Sentinel-2的多特征组合下的火烧迹地变化检测

doi:10.12118/j.issn.1000-6060.2025.244

Abstract

Abstract:

With the increasing intensification of global warming, extremely high-temperature events occur more frequently, resulting in a considerable rise in drought conditions and the accumulation of combustible materials, thereby substantially increasing wildfire risk. The intensity and frequency of wildfires continue to increase, posing serious threats to human safety, ecological balance, and economic development. Previous studies on burn scar change detection primarily rely on independent spectral index thresholds or original spectral features. However, these approaches are highly susceptible to interference from complex environmental factors, including vegetation phenological variations, topographic shadows, and atmospheric conditions, which often lead to false detections and missed burn scar identification. Moreover, existing studies show limitations in leveraging multifeature combinations for burn scar detection, as most methods depend on single-feature extraction and lack systematic evaluation of feature synergy. To address these limitations, this study explores multifeature combination recognition methods to improve the accuracy and reliability of burn scar identification. Based on feature importance derived from SHAP using Random Forest and XGBoost models, multispectral indices, polarization, and original spectral features are integrated to construct 20 feature combinations. Using bitemporal Sentinel-2 multispectral and Sentinel-1 polarization remote sensing images acquired before and after wildfire events, the bitemporal image transformer for change detection (BIT_CD), a transformer-based bitemporal change detection model, is applied to identify burn scars in China and surrounding regions. Experimental results show that the improved model achieves an overall accuracy of 92.7% on the test set, representing a 2.36% improvement over the original model. In comparison, the Intersection over Union increased by 5%-14%, substantially enhancing burned-area detection performance. Based on comprehensive evaluation metrics, the optimal feature combination consists of the improved burn index (NBR_PLUS), Sentinel-1 backscattering coefficients (VV and VH), the red-edge band (RE4), and Sentinel-2 shortwave infrared bands (S2 and S1). The proposed multifeature integration BIT_CD model effectively identifies burn scars and provides a robust methodological reference for post-fire disaster assessment, burned-area mapping, post-disaster reconstruction, ecological restoration, and sustainable development.

Key words: fire trails, change detection, feature combination, deep learning, Transformer

AN Jiale, WANG Lei, ZHENG Jianghua, LI Jianhao, ZHAO Guobing, Nigela TUERXUN, FU Rong, LUO Lei. Sentinel-1 and Sentinel-2 based change detection in fire trails under multi-feature combination[J].Arid Land Geography, 2026, 49(4): 791-803.

Figures/Tables 13

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光谱波段	空间分辨率/m	名称	简称
Blue	10	蓝波段	B
Green	10	绿波段	G
Red	10	红波段	R
RE1	10	红边1波段	RE1
RE2	10	红边2波段	RE2
RE3	10	红边3波段	RE3
NIR	10	近红外波段	NIR
RE4	10	红边4波段	RE4
SWIR1	20	短波红外1波段	S1
SWIR2	20	短波红外2波段	S2

光谱波段	空间分辨率/m	名称	极化方式
VV	10	垂直发射-垂直接收	同极化
VH	10	垂直发射-水平接收	交叉极化

简称	光谱指数
EVI	增强型植被指数
NDVI	归一化植被指数
IBI	生物完整性指数
BSI	裸土指数
SSI	土壤表面指数
RVI	比率植被指数
DVI	差异植被指数
GCVI	绿色叶绿素植被指数
NBR	归一化燃烧指数
NBR2	改进的归一化燃烧指数
BAI	燃烧区域指数
MIRBI	中红外燃烧指数
NBR_PLUS	增强型归一化燃烧指数
BAIS2	燃烧区域指数
REP	红边位置指数

编号	植被指数	Sentinel-1	原始波段	组合方式
1	-	-	RE4、S2、RE2、S1、RE1、RE3	GEE_RF
2	-	-	RE4、RE1、S1、RE3、NIR、S2	RF
3	-	-	RE4、S2、S1、RE1、G、R	XGBoost
4	-	VV、VH	RE4、S2、S1、RE1	无光谱指数
5	MIRBI、NBR_PLUS	-	RE4、S2、S1、RE1	无Sentinel-1
6	MIRBI、NBR2	-	RE4、S2、S1、RE1	无Sentinel-1
7	NBR2、NBR_PLUS	-	RE4、S2、S1、RE1	无Sentinel-1
8	MIRBI	VV、VH	RE4、S1、RE1	一种光谱指数
9	MIRBI	VV、VH	RE4、S2、RE1	一种光谱指数
10	MIRBI	VV、VH	RE4、S2、S1	一种光谱指数
11	MIRBI	VV、VH	S2、S1、RE1	一种光谱指数
12	NBR_PLUS	VV、VH	RE4、S1、RE1	一种光谱指数
13	NBR_PLUS	VV、VH	RE4、S2、RE1	一种光谱指数
14	NBR_PLUS	VV、VH	RE4、S2、S1	一种光谱指数
15	NBR_PLUS	VV、VH	S2、S1、RE1	一种光谱指数
16	NBR2	VV、VH	RE4、S1、RE1	一种光谱指数
17	NBR2	VV、VH	RE4、S2、RE1	一种光谱指数
18	NBR2	VV、VH	RE4、S2、S1	一种光谱指数
19	NBR2	VV、VH	S2、S1、RE1	一种光谱指数
20	-	-	R、G、B	RGB

特征组合方式	OA	IoU	F1	Precision	Recall
GEE_RF	92.09	53.82	69.98	73.57	66.72
RF	92.37	56.29	72.04	73.00	71.10
XGBoost	92.71	56.52	72.22	76.24	68.61
VV_VH_RE4_S2_S1_RE1	91.67	49.62	66.33	75.14	59.37
MIRBI_NBR_PLUS_RE4_S2_S1_RE1	92.67	56.09	71.87	76.56	67.72
MIRBI_NBR2_RE4_S2_S1_RE1	92.13	51.67	68.13	77.31	60.90
NBR2_NBR_PLUS_RE4_S2_S1_RE1	92.31	52.85	69.15	77.60	62.36
MIRBI_VV_VH_RE4_S1_RE1	92.12	56.03	71.82	71.03	72.63
MIRBI_VV_VH_RE4_S2_RE1	91.86	52.86	69.16	72.58	66.05
MIRBI_VV_VH_RE4_S2_S1	92.76	58.00	73.42	74.53	72.34
MIRBI_VV_VH_S2_S1_RE1	92.07	53.03	69.31	74.53	64.77
NBR_PLUS_VV_VH_RE4_S1_RE1	92.29	53.64	69.83	76.07	64.53
NBR_PLUS_VV_VH_RE4_S2_RE1	92.09	55.29	71.21	71.66	70.75
NBR_PLUS_VV_VH_RE4_S2_S1	92.92	57.62	73.11	76.95	69.64
NBR_PLUS_VV_VH_S2_S1_RE1	92.50	56.10	71.87	74.64	69.31
NBR2_VV_VH_RE4_S1_RE1	91.35	50.24	66.88	71.03	63.18
NBR2_VV_VH_RE4_S2_RE1	91.49	49.46	66.18	73.43	60.24
NBR2_VV_VH_RE4_S2_S1	91.96	51.52	68.00	75.51	61.86
NBR2_VV_VH_S2_S1_RE1	92.17	50.15	66.80	80.64	57.02
RGB	90.56	44.24	61.34	68.30	55.68

Sentinel-1 and Sentinel-2 based change detection in fire trails under multi-feature combination

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特征组合方式	OA	IoU	F1	Precision	Recall
GEE_RF	93.79	52.24	58.54	64.16	61.20
RF	94.71	57.94	69.35	83.04	71.29
XGBoost	94.39	63.58	79.44	77.22	77.41
VV_VH_RE4_S2_S1_RE1	90.28	43.74	50.07	64.25	53.67
MIRBI_NBR_PLUS_RE4_S2_S1_RE1	93.88	57.51	76.65	75.57	70.37
MIRBI_NBR2_RE4_S2_S1_RE1	92.70	56.95	61.32	90.77	70.64
NBR2_NBR_PLUS_RE4_S2_S1_RE1	95.53	55.50	84.15	67.69	65.93
MIRBI_VV_VH_RE4_S1_RE1	90.77	38.37	43.52	66.92	46.12
MIRBI_VV_VH_RE4_S2_RE1	91.28	41.13	68.87	70.21	48.47
MIRBI_VV_VH_RE4_S2_S1	82.41	26.89	46.84	48.40	36.67
MIRBI_VV_VH_S2_S1_RE1	92.16	41.92	44.06	68.93	50.43
NBR_PLUS_VV_VH_RE4_S1_RE1	86.13	40.12	59.91	53.37	51.95
NBR_PLUS_VV_VH_RE4_S2_RE1	82.81	31.45	53.05	45.32	42.30
NBR_PLUS_VV_VH_RE4_S2_S1	95.92	71.87	81.60	85.55	83.39
NBR_PLUS_VV_VH_S2_S1_RE1	92.90	54.07	60.59	65.87	62.76
NBR2_VV_VH_RE4_S1_RE1	82.12	16.85	42.88	19.18	23.02
NBR2_VV_VH_RE4_S2_RE1	88.25	33.10	44.24	58.26	41.98
NBR2_VV_VH_RE4_S2_S1	91.38	38.91	44.82	64.28	48.00
NBR2_VV_VH_S2_S1_RE1	93.00	42.64	65.87	59.63	52.74
RGB	86.63	33.23	77.59	46.32	46.59

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