Digital Picture

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[pic] Harbin Institute of Technology

数字图像处理技术 题 目: 基于 GPU的数字图像处理方法

哈尔滨工业大学
摘 要

数字图像处理是实现计算机视觉的关键技术。近几年GPU通用计算己成为国内外研究人员所研究的热点。使用GPU加速数字图像处理对于建立实时、准确、高效的计算机视觉系统具有重大意义。 在当前实际应用中,计算机视觉系统对实时性和准确率的要求都越来越高,需要处理的数据量越来越多,涉及到的计算量越来越大。这使得目前个人电脑的计算性能不能满足实际应用中的性能要求。近年来随着图形处理器(GPU)的急速发展,使用GPU进行加速计算通常能获得一个数量级的速度提升,这也是当今的热点研究问题之一。GPU强大的计算和并行处理能力可以打破计算机视觉系统中的处理速度瓶颈,提高算法的执行效率。 论文首先介绍了GPU通用计算的发展历程、工作原理、自身特点和发展趋势。并且探讨了能充分发挥出GPU强大计算和并行处理能力的CUDA平台,包括CUDA的概况、软硬件环境及需求、编程模型、特点、应用领域和发展趋势。在此基础上论文更进一步研究了使用CUDA实现的基于GPU的数字图像处理算法,包括使用GPU加速空间域和频域的图像处理算法。 主要内容为: (1)CUDA实现基于GPU的数字图像处理算法 在时域和频域空间使用GPU加速图像处理算法,包括直方图生成及均衡化算法、图像的平滑算法、图像的锐化算法和卷积滤波计算,最后使用CUDA实现了上述这些算法。并通过实验定量地验证GPU的加速能力。 (2)设计了一类基于GPU的角点检测算法 角点作为图像上的特征点包含有重要的信息,在图像融合和目标跟踪及三维重建中有重要的应用价值。使用GPU强大的计算和并行处理能力实现角点检测算法对于提高计算机视觉实时应用的速度和准确性有重要意义。本文设计了一类新的基于GPU的角点检测算法,并使用CUDA实现了基于GPU的角点检测算法。通过实验证明基于GPU的角点检测算法能有效地满足计算机视觉的实时应用。

关键词GPU;数字图像处理;
不要删除行尾的分节符,此行不会被打印
目 录

摘 要 I
第1章 绪论 3 1.1 研究的目的和意义 3 1.2 本文研究内容及主要贡献 3
第2章 基于图形处理器(GPU)的通用计算 5 2.1 引言 5 2.2 GPU 与 CPU 的异同 5
第3章 GPU加速数字图像处理算法 7 3.1 GPU 加速数字图像处理算法分析 7 3.2 时域空间 GPU 加速像素级图像处理 9 3.2.1 直方图均衡化处理 9 3.2.2 图像锐化处理 10 3.2.3 图像平滑处理 11
第4章 总结 13
参考文献 14
千万不要删除行尾的分节符,此行不会被打印。在目录上点右键“更新域”,然后“更新整个目录”。打印前,不要忘记把上面“Abstract”这一行后加一空行
绪论

1. 研究的目的和意义

数字图像处理(Digital Image Processing)是指使用计算机对经图像信号转换成的数字信号进行处理的过程[1]。在上世纪五六十年代,随着计算机和通信技术的发展,数字图像处理开始使用计算机进行处理。数字图像处理开始做为一门学科被众多学者进行研究。此时的数字图像处理主要的目的是改善图像的质量,常用的数字图像处理有下面的方法图像增强、图像复原、图像编码、图像压缩等。美国喷气推进实验室首先把数字图像处理技术应用于科学研究,他们把图像处理技术成功应用于数千张卫星发回的月球照片,绘制出月球地表的地图。随后数字图像处理技术进入了快速发展阶段。图像处理技术在众多应用领域得到广泛应用,取得了巨大的成果,如:医学工程、航空航天、机器视觉、军事、文化艺术等。从七十年代开始,随着计算机和通信技术的继续发展,数字图像处理开始应用于人工智能能领域,进入了更深层次的研究。人们通过使用计算机技术来模拟人类的视觉系统进而理解图像,即机器视觉[2]。而数字图像处理是机器视觉的关键技术。

2. 本文研究内容及主要贡献…...

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