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大型LED显示屏的计算机辅助校正 被引量:2
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作者 李天华 《电视技术》 北大核心 2011年第17期65-67,113,共4页
详细介绍了由计算机、数码相机及相关软件组成的现场逐点校正系统,以及对大型LED显示屏进行亮度、色度均匀性校正的方法。该方法首先对LED显示屏分区设置,然后采集亮度、色度等信息数据,并实现逐点校正。重点研究了利用数字图像处理技术... 详细介绍了由计算机、数码相机及相关软件组成的现场逐点校正系统,以及对大型LED显示屏进行亮度、色度均匀性校正的方法。该方法首先对LED显示屏分区设置,然后采集亮度、色度等信息数据,并实现逐点校正。重点研究了利用数字图像处理技术,对采集的图片进行修正,达到为校正系统获取图片的方案。应用表明,该方案尤其适用于大型LED显示屏的现场校正,提高了LED显示屏的显示效果。 展开更多
关键词 LED显示屏 计算机辅助校正 亮度 色度 均匀性 校正图片
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Remedial Learning: A CALL Approach
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作者 Karthika Premkumar 《Sino-US English Teaching》 2014年第9期672-681,共10页
Computer Assisted Language Learning (CALL) has been in use as a learner centered method since 1960. In this paper an attempt is made to evolve a Remedial Grammar (RG) which enables the teacher to develop a reperto... Computer Assisted Language Learning (CALL) has been in use as a learner centered method since 1960. In this paper an attempt is made to evolve a Remedial Grammar (RG) which enables the teacher to develop a repertoire of remedial activities based on the errors identified following Error Analysis (EA) for repeated presentation. The error types are considered as teaching/learning points. The present paper argues that CALL is the right model for effective remedial learning. Remedial Gmaster (RGm), an authoring package is introduced. This is an exclusive mode of error correction in which interlingual, intralingual, developmental, and global errors are dealt with. The syntactical problems due to the subtle difference between simple past and perfect tenses in English language use are discussed and CALL authoring package presented. 展开更多
关键词 authoring package Remedial Gmaster Remedial Grammar Remedial syllabus repeated presentation repertoire of learning activities
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