Is there a method to calculate the browning index for food stuff from color parameters?

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Ahmed Ali Abd El-Maksoud

You can use this equation

BI= [100×(X-0.31)]/0.17

X = a* + (1.75×L*)/ (5.645×L*) + a* - (3.012×b*)

Tarek Gamal Abedelmaksoud

BI was calculated by Eq. (3) according to Ndiaye et al., (2009):

BI = [100 (x × 0.31)] / 0.172 (3)

where, x = (a* + 1.75L*) / (5.645L* + a* – 3.012b*)