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Enhanced detection algorithm for apple bruises using structured light imaging

Artificial Intelligence in Agriculture 2024年第1期11卷 50-60页

作者： Haojie Zhu Lingling Yang Yu Wang Yuwei Wang Wenhui Hou Yuan Rao Lu Liu College of Engineering Anhui Agricultural UniversityHefei 230036China Key Laboratory of Agricultural Sensors Ministry of Agriculture and RuralAnhui Agricultural UniversityHefei 230094China Hefei Institute of Technology Innovation Engineering Chinese Academy of SciencesHefei 230094China

Bruising reduces the edibility and marketability of fresh apples,inevitably causing economic losses for the apple ***,bruises lack obvious visual symptoms,which makes it challenging to detect them using imaging techniques with uniform or diffuse *** study employed the structured light imaging(SLI)technique to detect apple ***,the grayscale reflection images were captured under phase-shifted sinusoidal illumination at three different wavelengths(600,650,and 700 nm)and six different spatial frequencies(0.05,0.10,0.15,0.20,0.25,and 0.30 cycles mm−1).Next,the grayscale reflectance images were demodulated to produce direct component(DC)images representing uniform diffuse illumination and amplitude component(AC)images revealing ***,by quantifying the contrast between bruised regions and sound regions in all AC images,it was found that bruises exhibited the optimal contrast when subjected to sinusoidal illumination at a wavelength of 700 nm and a spatial frequency of 0.25 mm−*** the AC image with optimal contrast,the developed h-domes segmentation algorithm to accurately segment the location and range of the bruised ***,the algorithm successfully accomplished the task of segmenting central bruised regions while addressing the challenge of segmenting edge bruised regions complicated by *** average Intersection over Union(IoU)values for the three types of bruises were 0.9422,0.9231,and 0.9183,*** result demonstrated that the combination of SLI and the h-domes segmentation algorithm was a viable approach for the effective detection of fresh apple bruises.

关键词： apple bruises Bruise enhancement Image segmentation Structured-illumination

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