Digital photography for tracking the phenology of an evergreen conifer stand

[1]  Youngryel Ryu,et al.  Correction for light scattering combined with sub-pixel classification improves estimation of gap fraction from digital cover photography , 2016 .

[2]  A. Kuusk Specular reflection in the signal of LAI-2000 plant canopy analyzer. , 2016 .

[3]  Nadine Gobron,et al.  The fourth phase of the radiative transfer model intercomparison (RAMI) exercise: Actual canopy scenarios and conformity testing , 2015 .

[4]  Simon D. Jones,et al.  Understanding the variability in ground-based methods for retrieving canopy openness, gap fraction, and leaf area index in diverse forest systems , 2015 .

[5]  Colin Kelley,et al.  Gnuplot 5.0 , 2015 .

[6]  A. Cutini,et al.  Photographic assessment of overstory and understory leaf area index in beech forests under different management regimes in Central Italy , 2014 .

[7]  P. Beckschäfer,et al.  Standardizing the Protocol for Hemispherical Photographs: Accuracy Assessment of Binarization Algorithms , 2014, PloS one.

[8]  Youngryel Ryu,et al.  Digital canopy photography: Exposed and in the raw , 2014 .

[9]  Richard A. Fournier,et al.  Hemispherical photography simulations with an architectural model to assess retrieval of leaf area index , 2014 .

[10]  A. Kuusk,et al.  Modeling directional forest reflectance with the hybrid type forest reflectance model FRT , 2014 .

[11]  David Doley,et al.  Improving accuracy of canopy hemispherical photography by a constant threshold value derived from an unobscured overcast sky , 2014 .

[12]  Mait Lang,et al.  Restoration of above canopy reference hemispherical image from below canopy measurements for plant area index estimation in forests/ Metsa võrastiku läbipaistvuse mõõtmine digitaalsete poolsfäärikaamerate abil , 2013 .

[13]  John M. Norman,et al.  On the correct estimation of gap fraction: How to remove scattered radiation in gap fraction measurements? , 2013 .

[14]  S. Sisak Effect of drainage on the development of an oligotrophic bog Scots pine (P. sylvestris L.) stand in Järvselja. , 2013 .

[15]  M. Rautiainen,et al.  Database of optical and structural data for the validation of radiative transfer models , 2013 .

[16]  Joachim Hill,et al.  An efficient approach to standardizing the processing of hemispherical images for the estimation of forest structural attributes , 2012 .

[17]  Miina Rautiainen,et al.  Seasonal changes in canopy leaf area index and MODIS vegetation products for a boreal forest site in central Finland , 2012 .

[18]  Alemu Gonsamo,et al.  Application note: CIMES: A package of programs for determining canopy geometry and solar radiation regimes through hemispherical photographs , 2011 .

[19]  Andres Kuusk,et al.  Simulation of statistical characteristics of gap distribution in forest stands , 2011 .

[20]  Andres Kuusk,et al.  Canopy gap fraction estimation from digital hemispherical images using sky radiance models and a linear conversion method , 2010 .

[21]  Hideki Kobayashi,et al.  How to quantify tree leaf area index in an open savanna ecosystem: A multi-instrument and multi-model approach , 2010 .

[22]  A. Kuusk,et al.  A dataset for the validation of reflectance models , 2009 .

[23]  H. Maas,et al.  Hemispheric Image Modeling and Analysis Techniques for Solar Radiation Determination in Forest Ecosystems , 2009 .

[24]  Agnès Bégué,et al.  Can Commercial Digital Cameras Be Used as Multispectral Sensors? A Crop Monitoring Test , 2008, Sensors.

[25]  Andres Kuusk,et al.  The performance of foliage mass and crown radius models in forming the input of a forest reflectance model: A test on forest growth sample plots and Landsat 7 ETM+ images , 2007 .

[26]  Craig Macfarlane,et al.  Estimating forest leaf area using cover and fullframe fisheye photography: Thinking inside the circle , 2007 .

[27]  K. Omasa,et al.  Factors contributing to accuracy in the estimation of the woody canopy leaf area density profile using 3D portable lidar imaging. , 2007, Journal of experimental botany.

[28]  Marco Conedera,et al.  Correcting non-linearity and slope effects in the estimation of the leaf area index of forests from hemispherical photographs , 2007 .

[29]  R. McMurtrie,et al.  Estimation of leaf area index in eucalypt forest using digital photography , 2007 .

[30]  Alessandro Cescatti,et al.  Indirect estimates of canopy gap fraction based on the linear conversion of hemispherical photographs Methodology and comparison with standard thresholding techniques , 2007 .

[31]  Andres Kuusk,et al.  Radiometric correction of hemispherical images , 2007 .

[32]  Jing M. Chen,et al.  Determining digital hemispherical photograph exposure for leaf area index estimation , 2005 .

[33]  Pol Coppin,et al.  Assessment of automatic gap fraction estimation of forests from digital hemispherical photography , 2005 .

[34]  Sylvain G. Leblanc,et al.  Methodology comparison for canopy structure parameters extraction from digital hemispherical photography in boreal forests , 2005 .

[35]  Michael Nobis,et al.  Automatic thresholding for hemispherical canopy-photographs based on edge detection , 2005 .

[36]  Kazukiyo Yamamoto,et al.  Effects of image quality, size and camera type on forest light environment estimates using digital hemispherical photography , 2004 .

[37]  Andres Kuusk,et al.  Improved algorithm for estimating canopy indices from gap fraction data in forest canopies , 2004 .

[38]  Frédéric Baret,et al.  Review of methods for in situ leaf area index determination Part I. Theories, sensors and hemispherical photography , 2004 .

[39]  E. Dufrene,et al.  Estimation of deciduous forest leaf area index using direct and indirect methods , 1995, Oecologia.

[40]  Ü. Niinemets,et al.  Needle longevity, shoot growth and branching frequency in relation to site fertility and within-canopy light conditions in Pinus sylvestris , 2003 .

[41]  A. Strahler,et al.  Monitoring vegetation phenology using MODIS , 2003 .

[42]  Tiit Nilson,et al.  Gap fraction based estimation of LAI in Scots pine stands subjected to experimental removal of branches and stems , 2003 .

[43]  A. Kuusk,et al.  Angular distribution of radiation beneath forest canopies using a CCD-radiometer , 2002 .

[44]  Sven Wagner,et al.  Relative radiance measurements and zenith angle dependent segmentation in hemispherical photography , 2001 .

[45]  Craig Macfarlane,et al.  Photographic exposure affects indirect estimation of leaf area in plantations of Eucalyptus globulus Labill. , 2000 .

[46]  Tiit Nilson,et al.  Inversion of gap frequency data in forest stands , 1999 .

[47]  S. T. Gower,et al.  Direct and Indirect Estimation of Leaf Area Index, fAPAR, and Net Primary Production of Terrestrial Ecosystems , 1999 .

[48]  G. Russell,et al.  Leaf area index estimates obtained for clumped canopies using hemispherical photography , 1999 .

[49]  Jing M. Chen,et al.  Canopy architecture and remote sensing of the fraction of photosynthetically active radiation absorbed by boreal conifer forests , 1996, IEEE Trans. Geosci. Remote. Sens..

[50]  P. Stenberg,et al.  Response of LAI-2000 estimates to changes in plant surface area index in a Scots pine stand. , 1996, Tree physiology.

[51]  M. Lorenz International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests-ICP Forests- , 1995 .

[52]  A. Kuusk A fast, invertible canopy reflectance model , 1995 .

[53]  Richard Kittler,et al.  Some qualities of scattering functions defining sky radiance distributions , 1994 .

[54]  Alain Royer,et al.  Measuring Leaf Area Index with the Li‐Cor LAI‐2000 in Pine Stands , 1994 .

[55]  P. Stenberg,et al.  Performance of the LAI-2000 plant canopy analyzer in estimating leaf area index of some Scots pine stands. , 1994, Tree physiology.

[56]  J. Chen,et al.  Measuring leaf area index of plant canopies with branch architecture , 1991 .

[57]  F. Smith,et al.  Comparison of Leaf Area Index Estimates from Tree Allometrics and Measured Light Interception , 1991, Forest Science.

[58]  M. Huston,et al.  A comparison of direct and indirect methods for estimating forest canopy leaf area , 1991 .

[59]  J. Norman,et al.  Instrument for Indirect Measurement of Canopy Architecture , 1991 .

[60]  J. Chen,et al.  Evaluation of hemispherical photography for determining plant area index and geometry of a forest stand , 1991 .

[61]  J. Welles Some indirect methods of estimating canopy structure , 1990 .

[62]  P. Rich Characterizing plant canopies with hemispherical photographs. , 1990 .

[63]  Dennis D. Baldocchi,et al.  Solar radiation within an oak—hickory forest: an evaluation of the extinction coefficients for several radiation components during fully-leafed and leafless periods , 1984 .

[64]  William E. Reifsnyder,et al.  Spatial and temporal distribution of solar radiation beneath forest canopies , 1970 .

[65]  Margaret C. Anderson Studies of the Woodland Light Climate: I. The Photographic Computation of Light Conditions , 1964 .

[66]  D. Coombe,et al.  Hemisperical and Woodland Canopy Photography and the Light Climate , 1959 .

[67]  W. R. G. Atkins,et al.  The Measurement of the Intensity and the Colour of the Light in Woods by Means of Emission and Rectifier Photoelectric Cells , 1936 .