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Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Table 4 Twenty codewords with the highest IDF and their corresponding anatomical elements, and the average number of SIFT keypoints belonging to each codeword by species

From: Detection and visualization of encoded local features as anatomical predictors in cross-sectional images of Lauraceae

Codeword numberIDF valueFeature typeAnatomical elementsClusterAverage number of SIFT keypoints in the codeword
CCCJLNLGLULCMJMTST
7510.180capI10.13.50.60.80.73.22.35.37.6
8200.137capI3.13.01.30.92.12.81.83.110.9
3130.120cvIV3.63.54.111.12.64.85.84.72.9
8780.114capI4.54.03.91.61.94.52.74.517.5
8470.109cGeneralIII20.012.24.41.41.38.74.914.921.8
9230.097capI3.32.94.413.63.94.94.74.61.9
3320.089bGeneralIII4.33.19.917.38.47.04.26.14.4
6820.089crI4.03.521.69.09.614.22.15.98.7
8500.086cvIV8.96.81.90.81.35.42.96.123.1
2940.086capI39.29.91.92.12.09.57.016.122.3
7600.083cwfII2.72.813.15.35.58.62.64.74.3
5180.080cGeneralIII4.34.37.932.87.45.84.84.61.6
6190.075cGeneralIII5.06.26.42.43.56.64.36.711.6
9480.075cGeneralIII15.715.71.71.31.06.15.615.219.9
2250.073br, apV8.17.17.142.17.07.610.55.42.8
8900.070crI5.34.546.947.07.118.13.18.59.9
2930.067cGeneralIII18.812.32.63.41.57.75.912.010.6
1510.064bvV31.219.926.91.36.09.20.840.759.6
8090.064craII10.46.25.09.45.65.82.57.95.4
6350.062crI54.0170.3156.40.229.827.52.794.370.4
  1. c, corner-based codeword; b, blob-based codeword; ap, axial parenchyma cells; v, vessels; r, rays; wf, wood fibers; general, observed in more than three different types of wood cells; CC, Cinnamomum camphora; CJ, Cinnamomum japonicum; LN, Laurus nobilis; LG, Lindera glauca; LU, Lindera umbellata; LC, Litsea coreana; MJ, Machilus japonica; MT, Machilus thunbergii; ST, Sassafras tzumu. aPeripheral cells in contact with rays, mainly wood fibers