共查询到17条相似文献,搜索用时 46 毫秒
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目的 达到纸病检测中能够充分提取纸病特征、提高检测精度、降低小目标漏检率的目标。方法 基于Faster R-CNN的检测算法进行改进,主要改进的做法是利用深度残差网络ResNet-50替换原模型的骨干特征提取网络VGG16,以保留更多的纸病特征信息,增强特征网络对纸张缺陷的提取能力;在算法中添加空间和通道的双重注意力机制CBAM,用来提高纸病检测精度;将ROI-Pooling替换为ROI-Align,增强网络的泛化能力。结果 实验结果表明,改进后的算法平均精度达到98%,较原算法平均精度提升了9%。结论 改进后的算法能够充分提取纸病特征信息,有效提高了纸病的检测精度,以及提高了小目标纸病的检测率,降低了错漏检率。 相似文献
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目的 针对现有食品包装盒表面缺陷检测方法存在的复杂背景下小目标缺陷检测难、漏检率高、检测精度低等问题,选择生活中常见的绿豆糕零食包装盒作为检测对象,提出一种基于改进Faster R-CNN的绿豆糕包装盒表面缺陷检测方法。方法 以Faster R-CNN算法架构为基础,以Swin Transformer V2-T为特征提取主干,初步提高算法对包装盒缺陷特征的提取能力;结合加权双向特征金字塔网络(Bidirectional Feature Pyramid Network,BiFPN)自适应调节每个尺度特征图的权重并对不同尺寸的特征进行多尺度融合,以提高识别的准确率;通过ROIAlign结合ECA注意力机制替换ROIPooling,去除2次量化误差并进一步优化算法对包装盒缺陷的检测能力。结果 本检测方法可准确提取目标缺陷,绿豆糕包装盒表面的4种缺陷的检测平均精确率(Average Precision,AP)较改进前分别提高19.66、12.96、14.56、18.86百分点,同时平均精确率均值(mean Average Precision,mAP)在IoU为0.5上较改进前提高了15.76百分点。结论 改进后的模型为Faster R-CNN在食品包装盒智能化生产上的应用了提供有益的参考和经验。 相似文献
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基于Faster R-CNN改进的数粒机系统 总被引:1,自引:1,他引:0
目的解决目前数粒机只能计数不能同时分拣残损药粒的问题。方法设计以Faster R-CNN深度神经网络为核心的药粒数粒机系统。在原有的数粒机基础之上,更换CCD线阵相机为面阵相机,以满足图像采集的需求,进一步使用图像分割和多线程技术加快图像处理速度。最终通过训练好的Faster R-CNN网络检测出目标并分拣。结果经过测试集的验证,正常药粒识别率达到了95.47%,残损药粒识别率达到了97.94%,单幅图像处理达到了65 ms的实时速度。结论该方法在传统的计数基础上很好地融合了先进的深度学习技术,实现了目标的自动分拣。 相似文献
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根据目标检测算法中出现的目标漏检和重复检测问题,本文提出了一种基于双阈值-非极大值抑制的Faster R-CNN改进算法。算法首先利用深层卷积网络架构提取目标的多层卷积特征,然后通过提出的双阈值-非极大值抑制(DT-NMS)算法在RPN阶段提取目标候选区域的深层信息,最后使用了双线性插值方法来改进原RoI pooling层中的最近邻插值法,使算法在检测数据集上对目标的定位更加准确。实验结果表明,DT-NMS算法既有效地平衡了单阈值算法对目标漏检问题和目标误检问题的关系,又针对性地减小了同一目标被多次检测的概率。与soft-NMS算法相比,本文算法在PASCAL VOC2007上的重复检测率降低了2.4%,多次检测的目标错分率降低了2%。与Faster R-CNN算法相比,本文算法在PASCAL VOC2007上检测精度达到74.7%,性能提升了1.5%。在MSCOCO数据集上性能提升了1.4%。同时本文算法具有较快的检测速度,达到16 FPS。 相似文献
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《中国计量学院学报》2020,(2):240-246
目的:为了解决传统目标检测方法在应对极端长宽比和小目标检测时存在的准确率低的问题,设计了一种改进Faster RCNN的铝型材表面缺陷检测方法。方法:在Faster RCNN的基础上,以残差网络替换原始VGG16网络提取图像特征,采用特征金字塔网络提取并融合多尺度的特征图,合成低级和高级语义信息。结果:在4 000张图片测试集的基础上,检测准确率达到78.9%,召回率为85.6%,均衡平均数为82.1%,相比于原始Faster RCNN模型,分别提高了16.2%、17%、16.6%。结论:相对于原始Faster RCNN模型,本文采用的改进算法在缺陷检测上有更好的效果,从而为计算机辅助小目标缺陷检测做了可行性论证。 相似文献
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Hyun Kyu Shin Si Woon Lee Goo Pyo Hong Lee Sael Sang Hyo Lee Ha Young Kim 《计算机、材料和连续体(英文)》2021,66(3):2493-2507
The demand for defect diagnoses is gradually gaining ground owing to the growing necessity to implement safe inspection methods to ensure the durability and quality of structures. However, conventional manpower-based inspection methods not only incur considerable cost and time, but also cause frequent disputes regarding defects owing to poor inspections. Therefore, the demand for an effective and efficient defect-diagnosis model for concrete structures is imminent, as the reduction in maintenance costs is significant from a long-term perspective. Thus, this paper proposes a deep learning-based image object-identification method to detect the defects of paint peeling, leakage peeling, and leakage traces that mostly occur in underground parking lots made of concrete structures. The deep learning-based object-detection method can replace conventional visual inspection methods. A faster region-based convolutional neural network (R-CNN) model was used with a training dataset of 6,281 images that utilized a region proposal network to objectively localize the regions of interest and detect the surface defects. The defects were classified according to their type, and the learning of each exclusive model was ensured through test sets obtained from real underground parking lots. As a result, average precision scores of 37.76%, 36.42%, and 61.29% were obtained for paint peeling, leakage peeling, and leakage trace defects, respectively. Thus, this study verified the performance of the faster RCNN-based defect-detection algorithm along with its applicability to underground parking lots. 相似文献
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目的 针对施工环境中工程机械目标大小不一、相互遮挡、工作形态各异等问题,提出一种基于注意力与特征融合的目标检测方法(AT–FFRCNN)。方法 在主干网络中采用ResNet50和特征路径聚合网络PFPN,融合不同尺度的特征信息,在区域建议网络(RPN)和全连接层引入注意力机制,提高目标识别的能力,在损失函数中使用广义交并比(GIoU),提高目标框的准确性。结果 实验表明,文中提出方法检测准确率比其他方法有较大提高,检测平均准确率(mAP)达到90%以上。结论 能够较好地完成工程机械目标的检测任务。 相似文献
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The aim of information hiding is to embed the secret message in a normal cover media such as image, video, voice or text, and then the secret message is transmitted through the transmission of the cover media. The secret message should not be damaged on the process of the cover media. In order to ensure the invisibility of secret message, complex texture objects should be chosen for embedding information. In this paper, an approach which corresponds multiple steganographic algorithms to complex texture objects was presented for hiding secret message. Firstly, complex texture regions are selected based on a kind of objects detection algorithm. Secondly, three different steganographic methods were used to hide secret message into the selected block region. Experimental results show that the approach enhances the security and robustness. 相似文献
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针对传统布匹瑕疵检测方法无法适用于尺度变化大、面积占比小的瑕疵特征,提出一种基于可变形密集卷积神经网络模型。为了关注到图像中距离较远的特征信息,并避免捕获纹理信息,采用可变形卷积来增强特征的语义表达能力。通过在卷积层中设置卷积像素相对于中心像素各自的x,y方向偏移量,并利用反向传播训练偏移量以增加感受野的变形适应性。同时,采用密集连接的方式以保持模型不遗漏边缘瑕疵信息。最后,根据瑕疵类别预测和位置边框回归实现瑕疵的分类和定位检测。实验结果表明:该模型的平均检测精度和单类目标检测精度标准差分别为93.53%,2.5139,相比于其他方法更具有竞争力。 相似文献
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Muhammad Usman Sana Zhanli Li Tayybah Kiren Hannan Bin Liaqat Shahid Naseem Atif Saeed 《计算机、材料和连续体(英文)》2023,75(2):2741-2757
Cloud computing is a technology that provides secure storage space for the customer’s massive data and gives them the facility to retrieve and transmit their data efficiently through a secure network in which encryption and decryption algorithms are being deployed. In cloud computation, data processing, storage, and transmission can be done through laptops and mobile devices. Data Storing in cloud facilities is expanding each day and data is the most significant asset of clients. The important concern with the transmission of information to the cloud is security because there is no perceivability of the client’s data. They have to be dependent on cloud service providers for assurance of the platform’s security. Data security and privacy issues reduce the progression of cloud computing and add complexity. Nowadays; most of the data that is stored on cloud servers is in the form of images and photographs, which is a very confidential form of data that requires secured transmission. In this research work, a public key cryptosystem is being implemented to store, retrieve and transmit information in cloud computation through a modified Rivest-Shamir-Adleman (RSA) algorithm for the encryption and decryption of data. The implementation of a modified RSA algorithm results guaranteed the security of data in the cloud environment. To enhance the user data security level, a neural network is used for user authentication and recognition. Moreover; the proposed technique develops the performance of detection as a loss function of the bounding box. The Faster Region-Based Convolutional Neural Network (Faster R-CNN) gets trained on images to identify authorized users with an accuracy of 99.9% on training. 相似文献