Skip to main content

Advertisement

Table 1 Results of error of area and perimeter for various sizes of test circle images

From: New parameter of roundness R: circularity corrected by aspect ratio

Width of test circle image (pixel) A I P I r A P ΔA (%) ΔP (%)
Area measured by ImageJ (pixel) Perimeter measured by ImageJ (pixel) Major and minor axis length measured by ImageJ Area calculated by p·r 2 Perimeter calculated by 2·p·r
1 1 2.828 1.128 0.999328 3.543716 0.067260 −20.196760
2 4 5.657 2.257 4.000856 7.090573 −0.021393 −20.218015
3 9 9.657 3.385 8.999267 10.634289 0.008145 −9.189979
4 12 11.314 3.909 12.001102 12.280483 −0.009184 −7.870074
6 32 19.314 6.383 31.999226 20.052782 0.002417 −3.684186
8 52 24.971 8.137 52.001806 25.563134 −0.003472 −2.316360
11 97 34.627 11.113 96.995686 34.912512 0.004447 −0.817792
16 208 52.284 16.274 208.007222 51.126268 −0.003472 2.264456
23 421 75.598 23.152 420.985191 72.734138 0.003518 3.937439
32 804 104.569 31.995 803.996244 100.515236 0.000467 4.032985
45 1581 147.196 44.866 1580.973153 140.950667 0.001698 4.430865
64 3196 211.48 63.791 3196.013548 200.405295 −0.000424 5.526154
90 6320 296.735 89.704 6319.946608 281.813369 0.000845 5.294863
128 12,796 422.96 127.642 12796.081336 400.999086 −0.000636 5.476550
181 25,565 597.47 180.417 25564.935720 566.796604 0.000251 5.411711
254 51,104 842.607 255.084 51104.156942 801.369854 −0.000307 5.145832
360 102,252 1193.97 360.82 102251.807881 1133.549225 0.000188 5.330229
510 204,520 1690.871 510.297 204520.017549 1603.144973 −0.000009 5.472121
722 408,932 2391.253 721.574 408932.420696 2266.891106 −0.000103 5.486011
1020 818,196 3381.743 1020.666 818195.500707 3206.516140 0.000061 5.464712
1442 1,636,024 4893.536 1443.278 1636024.391899 4534.190619 −0.000024 7.925238
  1. p = 3.141592