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Table 2

From: A system for computerised retinal haemorrhage analysis

 

Expected value

HAS Value, including human tracing error

centre of mass of square

135 × 289

134.5 × 288.5

 

300 × 300

300 × 300

centre of mass of circle

138 × 133

137 × 132

 

145 × 315

146 × 316

eccentricity of line shape

1

0.999

eccentricity of near circular shape

<0.2

0.106