共查询到19条相似文献,搜索用时 772 毫秒
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基于属性降维的粮库害虫检测与识别 总被引:1,自引:0,他引:1
介绍了害虫检测系统的组成,采用三帧差分法实现害虫图像的恢复与提取,利用图像的一阶灰度值直方图和图像的目标区域,自动提取静态害虫图像的纹理等特征.通过条件属性的可分性度量值作为判断条件属性重要性的方法,利用神经网络进行属性选择.实验结果表明,该方法简化了神经网络的结构,提高了分类效率. 相似文献
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王丽艳 《微电子学与计算机》2013,30(2)
针对单一特征图像自动识别算法存在识别结果不稳定和识别正确率低等缺陷,提出一种基于证据理论和改进神经网络相融合的图像自动识别算法.首先提取能反映图像类别信息的颜色和纹理特征,然后采用RBF神经网络对单一特征进行初步识别,识别结果作作为证据,最后采用证据理论对初步识别结果进行决策融合处理,得到图像最终识别结果.仿真测试结果表明,该算法的平均识别正确率达到92.29%,相对于单一特征识别算法,图像识别结果的可靠性和正确率得到了大幅提高,具有较好的应用前景. 相似文献
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精确制导空空导弹是一个复杂系统,及时、准确的识别和诊断导弹故障是化解风险的重要措施。由于导弹故障模式复杂,对其故障进行识别和诊断的难度很大。文中以某型空空导弹测试问题为例,提出一种基于BP神经网络算法的导弹故障自动识别与诊断技术。通过对导弹测试数据的采集和整理形成数据样本,利用神经网络系统的学习和判断能力自动识别及诊断导弹故障,并使用Matlab神经网络工具箱进行仿真验证。验证结果证明,该技术能够快速、准确的识别和诊断导弹故障。 相似文献
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传统超声红外热像检测与识别金属疲劳裂纹主要是通过图像处理算法提取红外热图像的相关热特征,并与裂纹特征进行匹配,其过程过于繁琐,识别率较低且需要人工筛选有效特征。结合主动红外热成像技术以及卷积神经网络(Convolutional Neural Network,CNN)在金属结构无损检测与缺陷自动识别中的优势,提出了一种基于CNN的金属疲劳裂纹超声红外热像检测与识别方法。通过超声红外热成像装置对实验对象(文中为金属平板试件)进行检测,获取红外热图像并制作图像数据集。运用设计的卷积神经网络对不同尺寸裂纹的超声红外热图像进行特征提取与识别分类。此外,对所提出的方法与两种常见图像分类网络模型以及支持向量机的分类结果进行对比。实验结果表明,设计的卷积神经网络在该数据集上识别分类准确率为100%,优于其他网络模型和支持向量机的识别分类,可以有效检测与识别金属疲劳裂纹。 相似文献
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谷物害虫图像识别中特征值提取技术的研究 总被引:3,自引:0,他引:3
本文阐述了在仓储物害虫分类识别研究中利用计算机数字图像处理技术,对谷物害虫图像的一阶灰度值直方图和图像的目标区域,自动提4取静态仓储物害虫图像的数理统计特征、纹理特征和几何形状特征的主要技术和方法。试验结果表明,该方法可以为谷物害虫的计算机自动模式识别(快速分类)提供稳定的特征参数值,有效地提高了识别率。该方法为仓储物害虫的快速鉴定和分类研究开辟了新的途径。 相似文献
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近年来的研究表明,脉冲耦合神经网络(Pulse Coupled Neural Network,PCNN)可有效地用于图像分割.然而对于不同图像,常需要选取适当的网络参数,以得到有效的分割结果.但是,目前网络参数的选取还主要停留在人工调整和确定阶段,尚无一种能够根据图像本身特性自动确定参数的方法,这在很大程度上限制了PCNN的应用.针对这一问题,本文提出了一种基于简化PCNN的自适应图像分割方法,通过利用图像本身空间和灰度特性自动确定网络参数,实现对不同图像的分割.实验结果表明,本文算法可以有效地对不同图像进行自动分割,具有一定的健壮性. 相似文献
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Hyperspectral imagery has been widely used in military and civilian research fields such as crop yield estimation, mineral exploration, and military target detection. However, for the limited imaging equipment and the complex imaging environment of hyperspectral images, the spatial resolution of hyperspectral images is still relatively low, which limits the application of hyperspectral images. So, studying the data characteristics of hyperspectral images deeply and improving the spatial resolution of hyperspectral images is an important prerequisite for accurate interpretation and wide application of hyperspectral images. The purpose of this paper is to deal with super-resolution of the hyperspectral image quickly and accurately, and maintain the spectral characteristics of the hyperspectral image, makes the spectral separability of the substrate in the original image remains unchanged after super-resolution processing. This paper first learns the mapping relationship between the spectral difference of low-resolution hyperspectral image and the spectral difference of the corresponding high-resolution hyperspectral image based on multiple scale convolutional neural network, Thus, apply this mapping relationship to the input low-resolution hyperspectral image generally, getting the corresponding high resolution spectral difference. Constrained space by using the image of reconstructed spectral difference, this requires the low-resolution hyperspectral image generated by the reconstructed image is to be close to the input low-resolution hyperspectral image in space, so that the whole process becomes a closed circulation system where the low-resolution hyperspectral image generation of high-resolution hyperspectral images, then back to low-resolution hyperspectral images. This innovative design further enhances the super-resolution performance of the algorithm. The experimental results show that the hyperspectral image super-resolution method based on convolutional neural network improves the input image spatial information, and the super-resolution performance of the model is above 90%, which can maintain the spectral information well. 相似文献
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基于脉冲耦合神经网络的红外图像拼接 总被引:1,自引:1,他引:0
创建高分辨率的宽视角的拼接图像为图像处理、计 算机图形学等交叉学科学研究的新领域,针对传统的基于边缘的拼接算法对噪声比较敏感, 红外图像噪声干扰严重与信噪比低的特点,提 出一种基于脉冲耦合神经网络(PCNN,pulse coupled neural network)的红外图像拼接算法 。采用PCNN仿生物视觉角度,提取图像的边缘信息;采用Hausdorff距离作为配准的相似性 测度,计算出最优配准参数进行图像拼接;使用加 权平均方法,实现拼接图像的融合,提高拼接图像的视觉效果。实验结果表明,本文算法能 够实现图像的精确拼接,对噪声具有较好的鲁棒性,并提高了搜索效率,减小了计算量。 相似文献
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目前在深度学习领域很少以天然气泄露图像为数据进行研究,本文使用甲烷红外图像训练的卷积神经网络(VGG16)来实现泄露检测。另外,针对泄露的甲烷气体与背景图像存在相似性的问题,使用U2-Net图像分割网络代替背景建模方法来提取泄露气体区域。通过迁移VGG16网络模型结构和卷积层参数,在卷积层和激励层之间加入BN层以提高训练速度,将最后一层池化层替换为基于最大池化算法的动态自适应池化方法以提高检测精度。将改进的VGG16神经网络对分割的红外图像进行训练并与其他卷积神经网络进行对比,使用准确率,精准率,召回率和F1-score来对模型进行综合评价,其表现效果最好。与现有的检测方法进行对比,所提出的检测方法准确率更高。该检测方法能够实现高精度泄漏检测,满足天然气泄露检测准确性的要求,且模型具有较好的泛化能力和鲁棒性。 相似文献
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Color correction and restoration based on multi-scale recursive network for underwater optical image
Underwater image processing has played an important role in various fields such as submarine terrain scanning, submarine communication cable laying, underwater vehicles, underwater search and rescue. However, there are many difficulties in the process of acquiring underwater images. Specifically, the water body will selectively absorb part of the light when light travels through the water, resulting in color degradation of underwater images. At the same time, due to the influence of floating substances in the water, the light has a certain degree of scattering, which will bring serious problems such as blurred details and low contrast to underwater images. Therefore, using image processing technology to restore the real appearance of underwater images has a high practical value. In order to solve the above problems, we combine the color correction method with the deblurring network to improve the quality of underwater images in this paper. Firstly, aiming at the problem of insufficient number and diversity of underwater image samples, a network combined with depth image reconstruction and underwater image generation is proposed to simulate underwater images based on the style transfer method. Secondly, for the problem of color distortion, we propose a dynamic threshold color correction method based on image global information combined with the loss law of light propagation in water. Finally, in order to solve the problem of image blurring caused by scattering and further improve the overall image clarity, the color-corrected image is reconstructed by a multi-scale recursive convolutional neural network. Experiment results show that we can obtain images closer to underwater style with shorter training time. Compared with several latest underwater image processing methods, the proposed method has obvious advantages in multiple underwater scenes. Simultaneously, we can restore the color information, remove blurring and boost detail for underwater images. 相似文献
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目标检测是遥感图像处理领域中一项重要而具有挑战性的任务,针对遥感图像中目标尺度差异较大以及方向分布随机等导致的遥感图像多尺度目标检测精度较低问题,本文提出一种基于特征增强和锚点框自动生成模块的目标检测方法。该方法在ResNet50网络中加入可操控的空洞卷积模块,并以此为基础设计了增强特征金字塔网络,提高网络对于目标多尺度特征表达能力。在区域建议网络中利用锚点框自动生成模块自主学习锚点框的位置和形状,以此获得更为稀疏和高质量的候选区域。本文在NWPU VHR-10数据集和飞机目标数据集上与多种基于卷积神经网络的目标检测算法进行对比实验,结果表明,本文所提方法在两个数据集上的mAP均为最优,分别为99.2%和87.7%,该方法具有较强的尺度自适应能力,有效的提高了遥感图像多尺度目标检测的精度。 相似文献