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生物视觉启发的低照度视频自适应增强设计与FPGA加速实现
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作者 张显石 宋健 +1 位作者 宋泗锦 李永杰 《电子与信息学报》 EI CSCD 北大核心 2023年第8期2739-2748,共10页
该文基于现场可编程门阵列实现了受生物视觉机制启发的夜间图像增强模型,实时高效地对夜间低照度视频图像进行自适应增强。受初级视觉系统中大小细胞通路启发,该文采取独立的两条通路分别处理结构与细节信息,获得了较好的处理效果与处... 该文基于现场可编程门阵列实现了受生物视觉机制启发的夜间图像增强模型,实时高效地对夜间低照度视频图像进行自适应增强。受初级视觉系统中大小细胞通路启发,该文采取独立的两条通路分别处理结构与细节信息,获得了较好的处理效果与处理效率。为了实现对高清视频的实时增强,基于现场可编程门阵列对该文算法进行了加速实现。通过滑动数据窗并行处理、相邻帧信息共享、多通道并行化等硬件设计保证高数据吞吐量。该设计在XC7Z100现场可编程门阵列上达到对1080P@60 Hz彩色视频增强的实时性要求。与本领域已有设计相比,该文设计具有更高的数据吞吐量,适用于高分辨率实时图像增强应用。 展开更多
关键词 生物视觉计算模型 图像增强 现场可编程门阵列
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Security Mechanisms of Wired Equivalent Privacy and Wi-Fi Protected Access in WLAN:Review and Analysis
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作者 张显石 康戈文 王新珩 《Journal of Southwest Jiaotong University(English Edition)》 2009年第1期16-21,共6页
An analysis of WLAN security mechanisms of wired equivalent privacy (WEP) and Wi-Fi protected access (WPA) discovers that the current literature is not totally creditable in its judgment on the security value of W... An analysis of WLAN security mechanisms of wired equivalent privacy (WEP) and Wi-Fi protected access (WPA) discovers that the current literature is not totally creditable in its judgment on the security value of WEP and WPA. Based on the respective performances of WEP and WPA under certain typical attacks, this paper substantiates the judgment that WEP has quite a few vulnerabilities concerning confidentiality and integrity, but at the same time challenges the judgment on WPA with that WPA is robust enough to confront potential typical attacks and is not so unreliable as the current literature believes, although it has some vulnerabilities in its message integrity code (MIC). 展开更多
关键词 WLAN security WEP WPA Temporal key integrity protocol (TKIP)
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