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DWT

DWT的相关文献在1989年到2022年内共计475篇,主要集中在自动化技术、计算机技术、水路运输、无线电电子学、电信技术 等领域,其中期刊论文344篇、会议论文8篇、专利文献123篇;相关期刊185种,包括科学技术与工程、电子设计工程、电脑知识与技术等; 相关会议8种,包括2011年青年通信国际会议(ICYC2011)、2007'信息与通信工程、电子科学与技术、计算机科学与技术、机械工程全国博士生学术论坛、中国教育和科研计算机网CERNET第十三届学术年会等;DWT的相关文献由838位作者贡献,包括李京兵、杜文才、叶学义等。

DWT—发文量

期刊论文>

论文:344 占比:72.42%

会议论文>

论文:8 占比:1.68%

专利文献>

论文:123 占比:25.89%

总计:475篇

DWT—发文趋势图

DWT

-研究学者

  • 李京兵
  • 杜文才
  • 叶学义
  • 邓猛
  • 魏应彬
  • 黄梦醒
  • 任佳
  • 吴以凡
  • 周又玲
  • 姚王泽
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 摘要: GENMA气力式卸船机是一款连续卸载、全封闭输送、具有创新理念的港机设备,可用于卸载大豆、玉米等粮食以及水泥熟料等多品种轻质散料。设备最大卸船能力600 t/h,适应船型500~80000 DWT,可根据码头实际情况设计成固定式、轨道式、轮胎式。
    • 杨永锋; 武文才; 杨羽
    • 摘要: 一直以来不可见性和鲁棒性是数字水印算法两个相互制衡的因素,结合人类视觉系统提出了一种建立在离散小波变换基础之上的图像数字水印算法,该算法依据人类视觉系统的光学特性在图像的蓝色通道实施2层离散小波变换,利用小波变换后的高频系数之和的近零性这一统计特性量化嵌入二值水印图像,水印实现了盲提取。同时水印在嵌入前实施了Arnold变换,在嵌入过程中利用密钥控制水印嵌入位置的随机选择,从两方面保证了水印算法的安全性。实验表明算法对压缩、添加噪声等攻击有抵抗力,同时确保算法的不可见性得以很好地维持,而且在针对图像的局部篡改可以定位篡改,能够实现版权保护和内容认证的功能。
    • Ramadhan J.Mstafa
    • 摘要: The rapid transmission of multimedia information has been achieved mainly by recent advancements in the Internet’s speed and information technology.In spite of this,advancements in technology have resulted in breaches of privacy and data security.When it comes to protecting private information in today’s Internet era,digital steganography is vital.Many academics are interested in digital video because it has a great capability for concealing important data.There have been a vast number of video steganography solutions developed lately to guard against the theft of confidential data.The visual imperceptibility,robustness,and embedding capacity of these approaches are all challenges that must be addressed.In this paper,a novel solution to reversible video steganography based on Discrete Wavelet Transform(DWT)and Quick Response(QR)codes is proposed to address these concerns.In order to increase the security level of the suggested method,an enhanced ElGamal cryptosystem has also been proposed.Prior to the embedding stage,the suggested method uses the modified ElGamal algorithm to encrypt secret QR codes.Concurrently,it applies two-dimensional DWT on the Y-component of each video frame resulting in Approximation(LL),Horizontal(LH),Vertical(HL),and Diagonal(HH)sub-bands.Then,the encrypted Low(L),Medium(M),Quantile(Q),and High(H)QR codes are embedded into the HL sub-band,HHsub-band,U-component,and V-component of video frames,respectively,using the Least Significant Bit(LSB)technique.As a consequence of extensive testing of the approach,it was shown to be very secure and highly invisible,as well as highly resistant to attacks from Salt&Pepper,Gaussian,Poisson,and Speckle noises,which has an average Structural Similarity Index(SSIM)of more than 0.91.Aside from visual imperceptibility,the suggested method exceeds current methods in terms of Peak Signal-to-Noise Ratio(PSNR)average of 52.143 dB,and embedding capacity 1 bpp.
    • 史国川; 拓浩男; 王峰; 袁宏武; 贾镕
    • 摘要: 针对舰船目标在雾天自然场景融合需要,论文提出了一种基于DWT的红外偏振自适应选择融合方法.利用DWT变换分别获取红外光强图像和偏振度图像的低频和高频成分,然后分别对低通带采用基于SR和像素平均值的融合方法,对高频带分别采用像素绝对值取大,特征匹配度,一致性检验,还有基于区域最大值四种融合规则.再经过DWT反变换分别得到基于不同的低频和高频处理方法的八张融合图像,最后再运用Choquet模糊积分计算将取得模糊积分最大值的图像作为最佳融合图像.实验结果表明,论文提出的融合算法在凸显红外偏振和光强图像共有信息的同时保留他们的特有信息,且提高了融合图像的细节信息,利于后期做目标检测的研究.
    • 高淼; 王洪君
    • 摘要: 本文提出基于视觉密码的数字水印技术,利用像素不扩展的(2,2)视觉密码方案,将秘密图像拆分成两个与秘密图像等大小的分享份图像,把两个分享份图像利用DWT-SVD水印算法嵌入到载体图像中,最后利用数字水印的提取算法,将两个分享份图像提取出来,进行叠加恢复秘密图像。基于视觉密码提取出来的分享份不会泄露秘密信息的任何内容,从而保证了秘密信息的安全性。实验结果表明,此方案可以抵抗常见的攻击行为。
    • 高淼; 王洪君
    • 摘要: 本文提出基于视觉密码的数字水印技术,利用像素不扩展的(2,2)视觉密码方案,将秘密图像拆分成两个与秘密图像等大小的分享份图像,把两个分享份图像利用DWT-SVD水印算法嵌入到载体图像中,最后利用数字水印的提取算法,将两个分享份图像提取出来,进行叠加恢复秘密图像.基于视觉密码提取出来的分享份不会泄露秘密信息的任何内容,从而保证了秘密信息的安全性.实验结果表明,此方案可以抵抗常见的攻击行为.
    • Hawar Hawar
    • 摘要: Efficient compression of images using hybrid schemes has become the spotlight for developers in recent times.Hybrid compression techniques(DWT and DCT)are the basis of the proposed compression scheme presented in this paper.The aim here is to achieve higher compression threshold while maintaining the quality of the reconstructed image,attempting to achieve this by using different compression levels on wavelet coefficients of the DWT(HH and LL)bands,in the time when(HL and LH)bands are undergoing DCT transform.According to the type of transformation,adaptive quantization of the retained coefficient is performed.Lastly the quantization indices are encoded using entropy coding(variable shift coding).Results of our trails indicate using hybrid DWT-DCT algorithm significantly improves coding performance.
    • Satya Prakash Yadav; Sachin Yadav
    • 摘要: This paper presents a low intricate,profoundly energy effective MRI Images combination intended for remote visual sensor frameworks which leads to improved understanding and implementation of treatment;especially for radiology.This is done by combining the original picture which leads to a significant reduction in the computation time and frequency.The proposed technique conquers the calculation and energy impediment of low power tools and is examined as far as picture quality and energy is concerned.Reenactments are performed utilizing MATLAB 2018a,to quantify the resultant vitality investment funds and the reproduction results show that the proposed calculation is very quick and devours just around 1%of vitality decomposition by the hybrid combination plans.Likewise,the effortlessness of our proposed strategy makes it increasingly suitable for continuous applications.
    • 赵翠
    • 摘要: 本文的研究以离散小波变换(DWT,Discrete Wavelet Transform)为基础,根据音频信号的特征选取DWT变换域,充分利用小波变换后的低频系数向量,将二值图像的水印信息嵌入至该低频系数向量中,在保证了音频质量的同时,也有效地完成了水印的嵌入与提取,具有较好地鲁棒性.
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