摘要
Nowadays,many researches have been accomplished on the attributed quality assessment of agricultural products.Fruits have significantly contributed to these researches because of their high production and consumption,worldwide.In this paper,the nondestructive instrumental researches in the field of firmness assessment for apple fruit discussed.These researches are important for all production and distribution chain activists such as farmers,insurance companies,packaging and transportation companies,wholesalers and retailers.These studies can be used for examining texture quality,predicting the right time to harvest fruits and classifying them according to the level of ripeness and detecting the apparent and internal defects of the fruit.The apple flesh firmness measurement methods consist of acoustic and mechanical vibration methods,optical methods such as hyperspectral scattering imaging,near infrared,ultrasound and other methods.The destructive puncture test method commonly used as a reference method.Nondestructive methods are accurate and quick that is suitable for online applications.Recently,the use of artificial intelligence methods and data fusion techniques to increase the accuracy of quality measuring of the products has been considered that in the future we will see further development of these methods in measuring the firmness of the apples.
