Prediction and Analysis of Strawberry Moisture Content based on BP Neural Network Model

Abstract

Background: Moisture content is one of the most important indicators to evaluate the quality of fresh strawberries. At present, several methods are usually employed to detect the moisture content in strawberry. However, these methods are relatively simple and can only be used to detect the moisture content of single samples instead of batches of samples. Besides, the integrity of the samples may be destroyed. Therefore, it is important to develop a simple and efficient prediction method for strawberry moisture to facilitate the market circulation of strawberry. Objective: This study aims to establish a novel BP neural network prediction model to predict and analyze strawberry moisture. Methods: We took Toyonoka and Jingyao strawberry as the research objects. The hyperspectral technology, spectral difference analysis, correlation coefficient method, principal component analysis and artificial neural network technology were combined to predict the moisture content of strawberry. Results: The characteristic wavelengths were highly correlated with the strawberry moisture content. The stability and prediction effect of the BP neural network prediction model based on characteristic wavelengths are superior to those of the prediction model bas ed on principal components, and the correlation coefficients of the calibration set for Toyonaka and Jingyao respectively reached up to 0.9532 and 0.9846 with low levels of standard deviations (0.3204 and 0.3010 respectively). Conclusion: The BP neural network prediction model of strawberry moisture has certain practicability and can provide some references for the on-line and non-destructive detection of fruits and vegetables.

A Novel Tomato Volume Measurement Method based on Machine Vision

“…Obviously, there is an obvious non-linear relationship between the pixel area of a tomato's orthographic projection and its actual volume, however, the irregular appearance of the tomato makes it difficult to describe such non-linear relationship using mathematical expressions, therefore, a BPNN model was constructed for each tomato's orthographic projection pixel area and its actual volume [18][19][20]. The BPNN constructed in this paper had an input layer, a hidden layer and an output layer.…”