Remote Sensing Technology and Application, Volume. 40, Issue 4, 990(2025)
Continuous Automatic Observation of Forest Canopy Structure Parameters based on Digital Hemispherical Photography
[2] [2] FANG H L, LI S J, ZHANG Y H,et al. New insights of global vegetation structural properties through an analysis of canopy clumping index, fractional vegetation cover, and leaf area index[J]. Science of Remote Sensing, 2021, 4: 100027. DOI: 10.1016/j.srs.2021.100027
[3] [3] LI X, STRAHLER A H. Modeling the gap probability of a discontinuous vegetation canopy[J]. IEEE Transactions on Geoscience and Remote Sensing, 1988, 26(2): 161-170. DOI: 10.1109/36.3017
[4] [4] FANG H L, ZHANG Y H, WEI S S,et al. Validation of global moderate resolution Leaf Area Index (LAI) products over croplands in Northeastern China[J]. Remote Sensing of Environment, 2019, 233: 111377. DOI: 10.1016/j.rse. 2019.111377
[5] [5] CHEN J M, MENGES C H, LEBLANC S G. Global mapping of foliage clumping index using multi-angular satellite data[J]. Remote Sensing of Environment, 2005, 97(4): 447-457. DOI: 10.1016/j.rse.2005.05.003
[7] [7] FANG H L, BARET F, PLUMMER S,et al. An overview of global Leaf Area Index (LAI): Methods, products, validation, and applications[J]. Reviews of Geophysics, 2019, 57(3): 739-799. DOI: 10.1029/2018RG000608
[10] [10] YAN G J, HU R H, LUO J H,et al. Review of indirect optical measurements of Leaf Area Index: Recent advances, challenges, and perspectives[J]. Agricultural and Forest Meteorology, 2019, 265: 390-411. DOI: 10.1016/j.agrformet. 2018.11.033
[12] [12] NIU X T, FAN J, LUO R H,et al. Continuous estimation of leaf area index and the woody-to-total area ratio of two deciduous shrub canopies using fisheye webcams in a semiarid loessial region of China[J]. Ecological Indicators, 2021, 125: 107549. DOI: 10.1016/j.ecolind.2021.107549
[13] [13] OLIVAS P C, OBERBAUER S F, CLARK D B,et al. Comparison of direct and indirect methods for assessing Leaf Area Index across a tropical rain forest landscape[J]. Agricultural and Forest Meteorology, 2013, 177: 110-116. DOI: 10.1016/j.agrformet.2013.04.010
[15] [15] FANG H L, YE Y C, LIU W W,et al. Continuous estimation of canopy Leaf Area Index (LAI) and clumping index over broadleaf crop fields: An investigation of the PASTIS-57 instrument and smartphone applications[J]. Agricultural and Forest Meteorology, 2018, 253: 48-61. DOI: 10.1016/j.agrformet.2018.02.003
[17] [17] LI S J, FANG H L, ZHANG Y H,et al. Comprehensive evaluation of global CI, FVC, and LAI products and their relationships using high-resolution reference data[J]. Science of Remote Sensing, 2022, 6: 100066. DOI: 10.1016/j.srs. 2022.100066
[19] [19] CHEN Y P, JIAO S F, CHENG Y L,et al. LAI-NOS: An automatic network observation system for Leaf Area Index based on hemispherical photography[J]. Agricultural and Forest Meteorology, 2022, 322: 108999. DOI: 10.1016/j.agrformet.2022.108999
[20] [20] QU Y H, HAN W C, FU L Z,et al. LAINet-A wireless sensor network for coniferous forest Leaf Area Index measurement: Design, algorithm and validation[J]. Computers and Electronics in Agriculture, 2014, 108: 200-208. DOI: 10.1016/j.compag.2014.08.003
[21] [21] BREDE B, GASTELLU-ETCHEGORRY J P, LAURET N,et al. Monitoring forest phenology and Leaf Area Index with the autonomous, low-cost transmittance sensor PAS-TiS-57[J].Remote Sensing, 2018, 10(7): 1032. DOI: 10.3390/rs10071032
[24] [24] WEISS M, BARET F. Can_Eye V6.4.91 User Manual[EB/OL]. https://www6.paca.inra.fr/can-eye/News/CANEYE-V6.49-Release.2017.
[25] [25] DEMAREZ V, DUTHOIT S, BARET F,et al. Estimation of leaf area and clumping indexes of crops with hemispherical photographs[J]. Agricultural and Forest Meteorology, 2008, 148(4): 644-655. DOI: 10.1016/j.agrformet.2007.11.015
[26] [26] LANG A. Leaf-area and average leaf angle from transmission of direct sunlight[J]. Australian Journal of Botany, 1986, 34(3): 349. DOI: 10.1071/bt9860349
[27] [27] LANG A R G, MCMURTRIE R E. Total leaf areas of single trees of Eucalyptus grandis estimated from transmittances of the Sun's beam[J]. Agricultural and Forest Meteorology, 1992, 58(1/2): 79-92. DOI: 10.1016/0168-1923(92)90112-H
[28] [28] CHEN J H, WANG S Q, CHEN B,et al. Comparative analysis on the estimation of diurnal solar-induced chlorophyll fluorescence dynamics for a subtropical evergreen coniferous forest[J]. Remote Sensing, 2021, 13(16): 3143. DOI: 10.3390/rs13163143
Get Citation
Copy Citation Text
FAN Yanguo, LI Yuan, LI Sijia, FANG Hongliang. Continuous Automatic Observation of Forest Canopy Structure Parameters based on Digital Hemispherical Photography[J]. Remote Sensing Technology and Application, 2025, 40(4): 990
Received: Oct. 14, 2024
Accepted: Aug. 26, 2025
Published Online: Aug. 26, 2025
The Author Email: FANG Hongliang (fanghl@lreis.ac.cn)