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Table 2 Relationship between tree crown size and image variance of multiple resolution image (R is the correlation coefficient, and R2 is the determination coefficient)

From: New approach to calculating tree height at the regional scale

  R2 R   R2 R   R2 R
γ1 0.03 0.18 γ13 0.40 −0.63 γ26 0.31 −0.55
γ2 0.17 0.42 γ14 0.54 −0.73 γ34 0.59 −0.77
γ3 0.30 0.55 γ15 0.66 −0.81 γ35 0.65 −0.80
γ4 0.47 0.69 γ16 0.41 −0.64 γ36 0.18 −0.42
γ5 0.60 0.77 γ23 0.49 −0.70 γ45 0.17 −0.41
γ6 0.40 0.63 γ24 0.62 −0.78 γ46 0.00 0.03
γ12 0.26 −0.51 γ25 0.72 −0.85 γ56 0.13 0.36