近年来,面向机器视觉视频的研究和应用越来越广泛,这对此类视频的存储和传输都提出了巨大的挑战。视频编码标准如多功能视频编码(Versatile Video Coding,VVC)能实现高效的全分辨率压缩与重建,但是对机器视觉任务而言,这种压缩方法是有...近年来,面向机器视觉视频的研究和应用越来越广泛,这对此类视频的存储和传输都提出了巨大的挑战。视频编码标准如多功能视频编码(Versatile Video Coding,VVC)能实现高效的全分辨率压缩与重建,但是对机器视觉任务而言,这种压缩方法是有冗余的。因此,提出了一种在VVC编码过程中结合显著性检测的视频编码方法用于机器任务,用实例分割网络掩膜基于区域的卷积神经网络(Mask Region-based Convolutional Neural Network,Mask R-CNN)获得包含对象的二进制掩膜,并依此判定是否为感兴趣区域,指导VVC编码过程中编码树单元(Coding Tree Unit,CTU)的量化参数的偏移。实验证明,与VVC基线方法相比,所提方法可以在相似的检测精度下节省一定的比特率。展开更多
Guiding college students to acquire an adequate vocabularyis an important task that is often neglected. The morevocabulary hat is mastered, the higher level a learner of Englishwill have. But in China, the traditional...Guiding college students to acquire an adequate vocabularyis an important task that is often neglected. The morevocabulary hat is mastered, the higher level a learner of Englishwill have. But in China, the traditional method of teachingvocabulary is learning by rote, and learners of foreign languagesare inclined to learn as much vocabulary as possible this wayregardless of whether these vocabulary is useful or not. Indeed,there are some disadvantageous factors hindering the studentsfrom expanding vocabulary rapidly and efficiently. We have todevelop a scientific method of teaching vocabulary exploringmethods of which is the key to this article.展开更多
文摘近年来,面向机器视觉视频的研究和应用越来越广泛,这对此类视频的存储和传输都提出了巨大的挑战。视频编码标准如多功能视频编码(Versatile Video Coding,VVC)能实现高效的全分辨率压缩与重建,但是对机器视觉任务而言,这种压缩方法是有冗余的。因此,提出了一种在VVC编码过程中结合显著性检测的视频编码方法用于机器任务,用实例分割网络掩膜基于区域的卷积神经网络(Mask Region-based Convolutional Neural Network,Mask R-CNN)获得包含对象的二进制掩膜,并依此判定是否为感兴趣区域,指导VVC编码过程中编码树单元(Coding Tree Unit,CTU)的量化参数的偏移。实验证明,与VVC基线方法相比,所提方法可以在相似的检测精度下节省一定的比特率。
文摘Guiding college students to acquire an adequate vocabularyis an important task that is often neglected. The morevocabulary hat is mastered, the higher level a learner of Englishwill have. But in China, the traditional method of teachingvocabulary is learning by rote, and learners of foreign languagesare inclined to learn as much vocabulary as possible this wayregardless of whether these vocabulary is useful or not. Indeed,there are some disadvantageous factors hindering the studentsfrom expanding vocabulary rapidly and efficiently. We have todevelop a scientific method of teaching vocabulary exploringmethods of which is the key to this article.
