Table 1 Calibration results of system accuracy.

From: Noncontact and Wide-Field Characterization of the Absorption and Scattering Properties of Apple Fruit Using Spatial-Frequency Domain Imaging

Optical property

μa (mm−1)

(mm−1)

Wavelength (nm)

460

527

630

460

527

630

Measured value (mm−1)

0.0073

0.0050

0.0043

1.077

1.024

0.974

0.0078

0.0047

0.0035

1.042

0.958

0.952

0.0072

0.0053

0.0048

0.991

0.976

0.948

0.0063

0.0051

0.0047

1.012

0.938

0.970

0.0054

0.0050

0.0046

1.017

0.976

1.002

Average value (mm−1)

0.00679

0.00502

0.00438

1.027

0.974

0.969

True value (mm−1)

0.00602

0.00472

0.00387

0.954

0.942

0.922

Relative error (%)

12.79

6.36

13.18

7.65

3.40

5.10

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