Aiming at the current problem of Rosa roxburghii processing, which relies on manual work to remove the persistent calyx, with low efficiency and insufficient precision, this study proposes an automated positioning met...
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Aiming at the current problem of Rosa roxburghii processing, which relies on manual work to remove the persistent calyx, with low efficiency and insufficient precision, this study proposes an automated positioning method of the persistent calyx of Rosa roxburghii based on an improved target detection model, to improve the detection precision and realize the automated processing of Rosa roxburghii products. By constructing a dataset containing 1120 images of Rosa roxburghii and combining data enhancement strategies such as flipping and rotating, the persistent calyx location is divided into six types of regions. Based on the YOLO-v5s model, the system compares the performance of four attention mechanisms with four loss functions. The experimental results show that the introduction of SimAM attention mechanism features of attention while Efficient-IoU can effectively optimize the bounding box regression accuracy. The optimized model achieves a mean average accuracy of 83.1% for the calyx detection mean value when the intersection and concurrency ratio threshold is 0.5, and the batch size is 5, which is a 4.8% improvement over the base model, and a 2.5% improvement in the overall mean average accuracy. In addition, the model training time is reduced to 0.528 h, which can balance efficiency and accuracy. The study shows that the improved model can accurately locate the persistent calyx with high confidence and no leakage detection, which provides reliable technical support for the design of automated processing equipment for Rosa roxburghii.
Rapid and accurate detection of millet ears is essential for yield estimation and phenotypic studies. However, traditional detection methods primarily rely on manual observation, which are both subjective and laborint...
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Rapid and accurate detection of millet ears is essential for yield estimation and phenotypic studies. However, traditional detection methods primarily rely on manual observation, which are both subjective and laborintensive. To address this issue, this study employed Unmanned Aerial Vehicle (UAV) for image data collection of millet ears and proposed the YOLOX-CBAM-eiou model to facilitate real-time detection, focusing on challenges such as small millet ears size, dense distribution, and severe occlusion in the dataset. Firstly, the Mosaic data augmentation technique was employed to enhance the diversity of the dataset. Subsequently, the CBAM attention mechanism was incorporated between the Neck and Prediction layers of YOLOX, enabling the reallocation of channel weights to enhance the extraction of fine-grained features and deeper semantic information. Additionally, eiou Loss was utilized as the loss function for bounding box regression to mitigate missed detections in dense scenes. The improved model achieved an average precision (AP) of 90.30%, a 6.44 percentage point increase over the original YOLOX model, significantly enhancing detection performance for densely distributed millet ears. The improved model also demonstrated a Precision of 91.01%, Recall of 89.45%, and F1-score of 90.22, highlighting strong robustness and generalization capabilities. These findings substantiate the efficacy of the YOLOX-CBAM-eiou model in improving detection performance under dense distribution and occlusion conditions, providing valuable technical reference for further UAV-based analyses of millet ears phenotypes and yield predictions.
目的针对合成孔径雷达(synthetic aperture radar,SAR)图像舰船检测中因背景复杂、目标尺寸各异等因素导致的漏检、误检结果,提出一种基于YOLOv8(you only look once v8)的改进算法。方法首先,轻量化处理YOLOv8的原有网络结构,大幅降低...
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目的针对合成孔径雷达(synthetic aperture radar,SAR)图像舰船检测中因背景复杂、目标尺寸各异等因素导致的漏检、误检结果,提出一种基于YOLOv8(you only look once v8)的改进算法。方法首先,轻量化处理YOLOv8的原有网络结构,大幅降低网络的冗余度,使轻量化的网络更适合SAR图像舰船检测任务。其次,在主干网络中融入可变形卷积,增强模型对目标的感知能力,能更好地适应目标形变和复杂背景;同时,在颈部网络融入卷积注意力模块,减弱背景信息的干扰,使网络更专注舰船目标的特征。最后,采用eiou(efficient intersection over union)损失函数,最小化预测框与真实框间的差值(包括宽度和高度),实现更快的收敛速度。结果分别在SSDD(SAR ship detection dataset)和HRSID(high-resolution SAR images dataset)上进行测试,结果表明,改进算法的检测性能优于当前几种流行的目标检测算法。其中,与YOLOv8相比,在两个公开数据集上,改进算法的精度评估指标mAP(mean average precision)@0.5分别提升0.68%和1.29%,mAP@0.75分别提升3.32%和3.10%,其处理速度FPS(frames per second)分别提升22帧/s和18帧/s。结论本文在轻量化处理YOLOv8基础上融合可变形卷积与注意力机制构建的改进算法,能实现SAR舰船检测精度和速度的双重提升。
Based on the improved YOLOv8n, a steel plate defect detection and recognition method is proposed to address the high labor costs and workload of traditional tasks. SPPFELAN processes inputs in parallel to enhance comp...
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Based on the improved YOLOv8n, a steel plate defect detection and recognition method is proposed to address the high labor costs and workload of traditional tasks. SPPFELAN processes inputs in parallel to enhance computational efficiency by executing multiple pooling operations simultaneously. The parallel feature fusion module PscSE, using a mixed-dimension SE attention mechanism (scSE), captures global and channel-related information better, improving characterization capability. The eiou loss function addresses the ambiguous aspect ratio definition of CIOU loss, enhancing detection accuracy and accelerating convergence. Results show the YOLOv8n-PscSE-SPPFELAN model achieves 76.9% mAP@0.5 on the Northeastern University steel plate dataset, a 4.6% improvement over the original YOLOv8n, with a computation amount of 7.7 GFLOPs, reducing resource usage and greatly improving detection speed.
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