Shape Feature Extraction Techniques for Fruits: A Review

Hassoon, Israa Mohammed

doi:10.24996/ijs.2021.62.7.31

Cited by 1 publication

(1 citation statement)

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“…The chain code is a method to describe the orientation of a curve with the coordinates of the starting point of the curve and the direction code of the contour point. It is often used in image processing, computer graphics, pattern recognition, and other fields to represent the image feature [31,32]. Chain codes are generally divided into original chain codes, differential chain codes, and normalized chain codes.…”

Section: Contour Orientation Richnessmentioning

confidence: 99%

Fast Shape Recognition Method Using Feature Richness Based on the Walking Minimum Bounding Rectangle over an Occluded Remote Sensing Target

Guo

Meng

2022

Remote Sensing

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Remote sensing target recognition has always been an important topic of image analysis, which has significant practical value in computer vision. However, remote sensing targets may be largely occluded by obstacles due to the long acquisition distance, which greatly increases the difficulty of recognition. Shape, as an important feature of a remote sensing target, plays an important role in remote sensing target recognition. In this paper, an occluded shape recognition method based on the local contour strong feature richness (contour pixel richness, contour orientation richness, and contour distance richness) to the walking minimum bounding rectangle (MBR) is proposed for the occluded remote sensing target (FEW). The method first obtains the local contour feature richness by using the walking MBR; it is a simple constant vector, which greatly reduces the cost of feature matching and increases the speed of recognition. In addition, this paper introduces the new concept of strong feature richness and uses the new strategy of constraint reduction to reduce the complex structure of shape features, which also speeds up the recognition speed. Validation on a self-built remote sensing target shape dataset and three general shape datasets demonstrate the sophisticated performance of the proposed method. FEW in this paper has both higher recognition accuracy and extremely fast recognition speed (less than 1 ms), which lays a more powerful theoretical support for the recognition of occluded remote sensing targets.

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Section: Contour Orientation Richnessmentioning

confidence: 99%