欧美sese,天天做天天爱天天爽综合网 ,草1024榴社区成人影院

a级一a一级在线观看_a级在线观看视频_a极毛片_a毛片_全部免费毛片在线播放_全部孕妇丰满孕妇孕交

  • <rt id="ecu44"><delect id="ecu44"></delect></rt>
  • <code id="ecu44"><tr id="ecu44"></tr></code>
  • <li id="ecu44"></li>
  • <code id="ecu44"></code>

  • 获得积分
    资料库会员登录
    搜索: [高级搜索]
    下载首页 | 资源分类 | 下载排行
    您的位置: 首页 > 经典课件论文文献 > 国外医疗信息化资料
     
    分类导航
    下载排行
    最新资源
    Agfa CR图像增强MUSICA算法
    资源大小:252.20 KB 资源类型:文档
    下载积分: 0
    更多
    -->
    下载统计:总下载:0,本月下载:0,本周下载:0,今日下载:0
    发表评论 错误报告 加入收藏夹
    资源介绍
    Image Processing
    in Computed Radiography
    Pieter Vuylsteke, Ph.D.
    Emile Schoeters, Ph.D.
    Agfa-Gevaert N.V.
    International Symposium on
    Computerized Tomography for Industrial Applications
    and Image Processing in Radiology
    Berlin, Germany
    March 15-17, 1999
    R&D Equipment
    2
    1. ABSTRACT 3
    2. INTRODUCTION 3
    3. CR IMAGE PROCESSING OVERVIEW 3
    4. IMAGE CONTRAST ENHANCEMENT 5
    4.A. Edge enhancement 5
    4.B. Dynamic range compression 7
    4.C. Multiscale contrast enhancement 7
    4.C.1. The multiscale representation 8
    4.C.2. Contrast equalization 10
    4.C.3. Frequency processing 12
    5. CONCLUSION 15
    6. ACKNOWLEDGMENTS 15
    7. REFERENCES 15
    3
    1. ABSTRACT
    This article starts with an overview of image processing techniques used in storage phosphor
    based Computed Radiography (CR) systems. Next it elaborates on a selection of image enhancement
    algorithms. Both the working principles and image quality issues are discussed. The main focus is on
    multiscale image enhancement, which has become state-of-the-art.
    2. INTRODUCTION
    Since the early days of CR technology developers have investigated solutions for bridging the
    gap between the very large dynamic range that characterizes the CR detector and the limited range of
    the output medium and viewing process. A considerable part of image processing functionality in
    current CR systems deals directly or indirectly with the issue of manipulating image contrast, in such
    a way that all relevant image features are rendered to an appropriate level of visibility, despite the
    restriction of viewing density range. CR equipment manufacturers have adopted basic image
    processing techniques, or they have developed dedicated solutions.
    With this article it is our aim to provide a better understanding of the essential image
    enhancement techniques of CR systems, what their purpose is, how they operate, and how they affect
    image quality.
    3. CR IMAGE PROCESSING OVERVIEW
    A simplified diagram of the image processing operations in current CR systems is depicted in
    Fig. 3.1. The ensemble of operations applied to the stream of image data could be roughly entitled
    ‘image enhancement’. The role of image processing functions within this data path is to improve the
    visual quality of the CR image in terms of spatial resolution, sharpness, contrast resolution, dynamic
    range, SNR. The processing efforts in the main path have to do with maximizing the information
    transfer to the viewer. The enhancement of image contrast is the main topic of this article and will be
    elaborated in section 4.
    The image processing operations are controlled by parameters, which often are assigned a
    value in accordance with the examination type. The predefined parameter values are stored in tables,
    with entries for each examination type. Specification of the examination type is done immediately
    before or after each exposure by means of an identification terminal, and hence is prone to human
    errors.
    In current CR systems some image processing functions are controlled by internal parameters
    which are derived from the actual image data. The parameter values are estimated by heuristic
    algorithms. This way the kind and degree of enhancement are adapted to the specific characteristics of
    the image in terms of density levels, dynamic range, noise level, or the presence of irrelevant regions
    like collimation borders. In most cases a reduced version of the original image is used as input for
    analysis, since this still contains the essential data for the task at hand. Although the final purpose of
    the analysis work is very similar among different equipment, most algorithms are proprietary, so that
    only little is published about their actual implementation.
    下载地址
     下载地址1
    按字母检索

    下载须知:
    大部份资源无需注册即可下载
    需要积分的资源要在会员中心注册会员并用 积分体系中提示的方法赚取积分才能下载。

    免责声明:
    所有资源只能用于参考学习,不能用于任何商业用途,否则后果自负!
    主站蜘蛛池模板: 爱爱www在线观看视频高清 | 国产第三区 | a久久久久一级毛片护士免费 | 毛片黄片一级片 | 国语刺激对白勾搭视频在线观看 | 国产高清一区二区三区四区 | 麻豆精品久久久一区二区 | 日本天堂在线播放 | 日韩欧美手机在线 | 国产 日韩 一区 | 国产喷水视频 | 黄网观看 | 草莓社区 | a级精品九九九大片免费看 a级毛片黄色 | 成人午夜在线观看 | 91亚洲精品一区二区在线观看 | 国产精品视频视频久久 | 成人国产欧美精品一区二区 | 国产成人小视频在线观看 | 91成人在线免费观看 | 91精品国产爱久久久久久 | 成年人免费在线视频 | 69国产成人精品午夜福中文 | 国产在线观看精品 | 欧美在线播放成人a | 78视频在线观看 | 激情五月久久综合小说 | 国产成人精品一区二区免费 | 黄视频免费在线 | 国产浮力影院第一页 | 青青草原1769久久免费播放 | 成年人在线免费观看 | 国产成人一区二区三区 | 久久er国产精品免费观看8 | 国产精品高清视亚洲乱码 | 国产一区二区免费福利片 | 高清一级毛片 | 日韩欧美亚洲国产高清在线 | 成人做爰在线视频 | 成人深夜视频 | 久久精品国产亚洲a |