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Computerized fruit rating using computer vision

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Digital image processing, along with computer vision techniques, can be applied for automatic gradation of fruits based on the quality depending on the fruit type. It can increase the commercial value of the production. This paper presents an automated approach for fruit grading. First, it classifies the type of the fruit by using the SURF (Speeded Up Robust Features), and then after classification, it detects the grade of the fruit – A (good), B (medium) or C (bad). For gradation we have used the color features and area of the fruit. Minimum distance classifier is used for the classification. The average accuracy for fruit detection and grading are 87.48% and 78.9% respectively



New trends in cropping pattern have been recognized for changing the status of rural community. Previously manual fruit grading was done, which is expensive for labour cost and is also time-consuming. The growing need to supply high quality food products within a short time is promoting the automated grading of agricultural products, which can be done by using computer vision for quality inspection and evaluation purposes. Different features of flabbiness, segmentation level, color, size and shape are the essential quality of natural image and it performs the significant role in visual perception. Grading can fetch higher price and also improves packaging, handling and other post harvesting operation. Grading is basically separating the material in different homogenous groups according to its specific characteristics like size, shape, color and on quality basis. There are various types of grading like- Size Grading, Weight Grading, Screen Grading, Electronic color grading and reflectance grading and Image processing in fruit grading. The application of machine vision in agriculture has increased considerably in recent years. In past, much research work has been carried for automated grading of fruits. The size gradation technique using mechanical roller belt for distinguishing large and small sized fruits are modelled Various models are suggested for weight based gradation of fruits


Existing System:

Camera form computer is used to capture the image of the fruits to do the classification of fruits fruit verified are further classified upon their appearance such as colour and size fruit classification and fruit disease identification can be seen as an instance of image categorization



  • Long process
  • No filter is used to remove noise


Proposed System:

This proposed system we have to identify the fruit in picture then long process only on that here we use the morphological operation for segmentation and calculate the exact place of damaged part of fruit



  • Simple process
  • No noise
  • Accurate Result 


Block Diagram:

Fruit Grading System

Software Requirement:

  • Python Idle
  • Opencv
  • Numpy
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