随着VLSI的集成度越来越高,设计也越趋复杂。传统的设计方法如原理图输入、HDL语言描述在进行复杂系统设计时,设计效率往往比较低。特别是在算法由软件转化为硬件的环节上,传统的设计方法的效率不是很高,设计者往往要耗费大量的时间和...随着VLSI的集成度越来越高,设计也越趋复杂。传统的设计方法如原理图输入、HDL语言描述在进行复杂系统设计时,设计效率往往比较低。特别是在算法由软件转化为硬件的环节上,传统的设计方法的效率不是很高,设计者往往要耗费大量的时间和精力手工进行算法的转化。为解决这些问题,一种新的系统级的设计方法SYSTEM C 被提出。SYSTEM C是一种方法,也是一个C++库,用SYSTEM C可以很方便地实现一个软件算法的硬件实现,以及完成一个系统级的设计。展开更多
There are many detectors for the least significant bit(LSB)steganography which is broadly used in hiding information in the digital images.The length of the hidden information is one of the most important parameters i...There are many detectors for the least significant bit(LSB)steganography which is broadly used in hiding information in the digital images.The length of the hidden information is one of the most important parameters in detecting steganographic information.Using 2-D gradient of a pixel and the distance between variables the proposed method gives the length of hidden information in natural grayscale images without original image.Extensive experimental results show good performance even at low embedding rate compared with other methods.Furthermore,the proposed method also works well disregarding the status of the embedded information.展开更多
文摘随着VLSI的集成度越来越高,设计也越趋复杂。传统的设计方法如原理图输入、HDL语言描述在进行复杂系统设计时,设计效率往往比较低。特别是在算法由软件转化为硬件的环节上,传统的设计方法的效率不是很高,设计者往往要耗费大量的时间和精力手工进行算法的转化。为解决这些问题,一种新的系统级的设计方法SYSTEM C 被提出。SYSTEM C是一种方法,也是一个C++库,用SYSTEM C可以很方便地实现一个软件算法的硬件实现,以及完成一个系统级的设计。
基金The National Natural Science Foundation ofChina(No.60372076)
文摘There are many detectors for the least significant bit(LSB)steganography which is broadly used in hiding information in the digital images.The length of the hidden information is one of the most important parameters in detecting steganographic information.Using 2-D gradient of a pixel and the distance between variables the proposed method gives the length of hidden information in natural grayscale images without original image.Extensive experimental results show good performance even at low embedding rate compared with other methods.Furthermore,the proposed method also works well disregarding the status of the embedded information.
