Tang et al. (2020) exposed the bruised area Phone Number List of the apple at room temperature for different periods, and spectral data of these samples were collected based on hyperspectral technology; then piecewise nonlinear curve fitting (PWCF) was Phone Number List used to extract the feature descriptors; finally, the feature descriptors were fed into an error correction output coding-based support vector machine (ECOC-SVM). The experimental Phone Number List results showed that the method effectively classified the storage time of bruised apples.
These scholars come true the detection of fruit Phone Number List defects and storage time of mild bruise’s fruit based on hyperspectral technique and the satisfactory results are achieved. However, it is not guaranteed that the storage time of all fruits after bruising can be distinguished only based on the modeling of spectral data. So, we should make Phone Number List full use of the advantages of hyperspectral “union of imagery and spectrum,” and use the image features to classify the storage time of fruits after bruising. Therefore, to distinguish the Phone Number List different storage times of mild bruise’s yellow peaches more effectively, the combined the mild bruise of yellow peaches’ hyperspectral images spectral and image features at 2 h, 8 h, 24 h and 48 h and machine learning method is used to model.
It provides a theoretical basis for hyperspectral Phone Number List imaging technology in fruit bruise detection. Materials and methods Sample Phone Number List preparation and processing The yellow peaches used in the experiment were bought from Linyi of Shandong Province. Before the experiment, the samples were screened to remove the defective ones. To prevent the size and temperature factors of samples from interfering with the experimental Phone Number List results, in the experiment, 80 yellow peaches with a diameter of about 80 mm were used, and the selected yellow peaches were placed in the dark environment at 24 °C for 12 h. For the bruise Phone Number List treatment of yellow peaches in the experiment, the iron ball with a diameter of 30 mm Phone Number List and a weight of 100 g was fixed on the falling ball impact test machine, and it was 0.4 m away from the surface of yellow peach.