Steganography technology has been widely used in data transmission with secret information.However,the existing steganography has the disadvantages of low hidden information capacity,poor visual effect of cover images...Steganography technology has been widely used in data transmission with secret information.However,the existing steganography has the disadvantages of low hidden information capacity,poor visual effect of cover images,and is hard to guarantee security.To solve these problems,steganography using reversible texture synthesis based on seeded region growing and LSB is proposed.Secret information is embedded in the process of synthesizing texture image from the existing natural texture.Firstly,we refine the visual effect.Abnormality of synthetic texture cannot be fully prevented if no approach of controlling visual effect is applied in the process of generating synthetic texture.We use seeded region growing algorithm to ensure texture’s similar local appearance.Secondly,the size and capacity of image can be decreased by introducing the information segmentation,because the capacity of the secret information is proportional to the size of the synthetic texture.Thirdly,enhanced security is also a contribution in this research,because our method does not need to transmit parameters for secret information extraction.LSB is used to embed these parameters in the synthetic texture.展开更多
As a classic NP-hard problem in machine learning and computational geometry,the k-means problem aims to partition the given dataset into k clusters according to the minimal squared Euclidean distance.Different from k-...As a classic NP-hard problem in machine learning and computational geometry,the k-means problem aims to partition the given dataset into k clusters according to the minimal squared Euclidean distance.Different from k-means problem and most of its variants,fuzzy k-means problem belongs to the soft clustering problem,where each given data point has relationship to every center point.Compared to fuzzy k-means problem,fuzzy k-means problem with penalties allows that some data points need not be clustered instead of being paid penalties.In this paper,we propose an O(αk In k)-approximation algorithm based on seeding algorithm for fuzzy k-means problem with penalties,whereαinvolves the ratio of the maximal penalty value to the minimal one.Furthermore,we implement numerical experiments to show the effectiveness of our algorithm.展开更多
为解决带式高速导种装置导种过程中种带托片与种粒均经过监测点,无法区分脉冲变化特征,导种性能难以监测的问题,研究一种基于红外传感器的带式高速导种装置监测方法并设计了监测系统。利用其导种特性提出了双侧脉冲比较法,设计了带式高...为解决带式高速导种装置导种过程中种带托片与种粒均经过监测点,无法区分脉冲变化特征,导种性能难以监测的问题,研究一种基于红外传感器的带式高速导种装置监测方法并设计了监测系统。利用其导种特性提出了双侧脉冲比较法,设计了带式高速导种装置监测模块硬件电路与软件程序。同时通过对监测系统采样试验结果分析,提出一种基于双侧脉冲值分析与能量掩码平滑算法(Bilateral pulse value analysis and energy masking smoothing algorithm,BPV-EMSA)的带式高速导种装置监测算法。仿真试验表明:该算法减少了原始脉冲的噪声和随机波动,使数据更加平滑稳定并突出了数据主要趋势和模式,同时抑制了瞬态脉冲干扰,提升了数据可解释性和分析准确性。监测系统精度试验结果表明:所设计的带式高速导种装置监测系统在不同作业速度下最高监测精度为97.65%,最低精度为95.99%,系统能够精确采集种粒经过监测点的脉冲变化。监测系统性能评价试验结果表明:播种合格率平均监测差值为2个百分点,播种漏播率平均监测差值为1.45个百分点,播种重播率平均监测差值为0.56个百分点。播种合格率相对差值不大于2.23个百分点,播种漏播率相对差值不大于1.78个百分点,播种重播率相对差值不大于1.00个百分点。该监测方法能够准确监测带式高速导种装置的导种性能。展开更多
基金This work was mainly supported by National Natural Science Foundation of China(No.61370218)Public Welfare Technology and Industry Project of Zhejiang Provincial Science Technology Department(No.2016C31081,No.LGG18F020013)。
文摘Steganography technology has been widely used in data transmission with secret information.However,the existing steganography has the disadvantages of low hidden information capacity,poor visual effect of cover images,and is hard to guarantee security.To solve these problems,steganography using reversible texture synthesis based on seeded region growing and LSB is proposed.Secret information is embedded in the process of synthesizing texture image from the existing natural texture.Firstly,we refine the visual effect.Abnormality of synthetic texture cannot be fully prevented if no approach of controlling visual effect is applied in the process of generating synthetic texture.We use seeded region growing algorithm to ensure texture’s similar local appearance.Secondly,the size and capacity of image can be decreased by introducing the information segmentation,because the capacity of the secret information is proportional to the size of the synthetic texture.Thirdly,enhanced security is also a contribution in this research,because our method does not need to transmit parameters for secret information extraction.LSB is used to embed these parameters in the synthetic texture.
基金Higher Educational Science and Technology Program of Shandong Province(No.J17KA171)Natural Science Foundation of Shandong Province(No.ZR2020MA029).
文摘As a classic NP-hard problem in machine learning and computational geometry,the k-means problem aims to partition the given dataset into k clusters according to the minimal squared Euclidean distance.Different from k-means problem and most of its variants,fuzzy k-means problem belongs to the soft clustering problem,where each given data point has relationship to every center point.Compared to fuzzy k-means problem,fuzzy k-means problem with penalties allows that some data points need not be clustered instead of being paid penalties.In this paper,we propose an O(αk In k)-approximation algorithm based on seeding algorithm for fuzzy k-means problem with penalties,whereαinvolves the ratio of the maximal penalty value to the minimal one.Furthermore,we implement numerical experiments to show the effectiveness of our algorithm.
文摘为解决带式高速导种装置导种过程中种带托片与种粒均经过监测点,无法区分脉冲变化特征,导种性能难以监测的问题,研究一种基于红外传感器的带式高速导种装置监测方法并设计了监测系统。利用其导种特性提出了双侧脉冲比较法,设计了带式高速导种装置监测模块硬件电路与软件程序。同时通过对监测系统采样试验结果分析,提出一种基于双侧脉冲值分析与能量掩码平滑算法(Bilateral pulse value analysis and energy masking smoothing algorithm,BPV-EMSA)的带式高速导种装置监测算法。仿真试验表明:该算法减少了原始脉冲的噪声和随机波动,使数据更加平滑稳定并突出了数据主要趋势和模式,同时抑制了瞬态脉冲干扰,提升了数据可解释性和分析准确性。监测系统精度试验结果表明:所设计的带式高速导种装置监测系统在不同作业速度下最高监测精度为97.65%,最低精度为95.99%,系统能够精确采集种粒经过监测点的脉冲变化。监测系统性能评价试验结果表明:播种合格率平均监测差值为2个百分点,播种漏播率平均监测差值为1.45个百分点,播种重播率平均监测差值为0.56个百分点。播种合格率相对差值不大于2.23个百分点,播种漏播率相对差值不大于1.78个百分点,播种重播率相对差值不大于1.00个百分点。该监测方法能够准确监测带式高速导种装置的导种性能。
