Study on nondestructive measurement model of apple fruit texture by near infrared spectroscopy

In order to establish a new method used to measure texture of apple fruit rapidly and nondestructively,the effects of different modeling methods and spectrum pretreatment methods on nondestructive measurement model performance of apple texture,including flesh brittleness,firmness,resilience,cohesiveness and chewiness using near infrared diffuse reflection spectroscopy. The results showed that modified partial least squares(MPLS) model,with respect to original spectrum combined with inverse multiple scatter correction(IMSC),provided better prediction performance for the flesh brittleness,firmness,resilience,cohesiveness and chewiness of apple fruit,with correlation coefficient of prediction greater than 0.8,with standard error of prediction of7.6763 N,6.5876 N,0.0085,0.0175 and 1.2466 N respectively,with the sum of residual error less than 0.2.Therefore,apple texture measured by near infrared diffuse reflection spectroscopy rapidly and nondestructively was feasible,but the precision of the models could be improved further.