The conclusions drawn from second phase can be used to minimize the effect of noise on digital images of pavement distress images. The first phase of the work involved research of basic criteria for evaluation of image quality through measurement of well-defined properties of images. Digital imaging systems installed in automated highway evaluation vehicles are generally designed on modular basis where subsystems by different manufacturers are assembled to customize the system and fulfill the needs of users while minimizing the cost. Manual pavement condition surveys are gradually replaced by more comprehensive automated surveys conducted by multi-function highway evaluation vehicles. Images acquired by digital cameras of the imaging subsystem can become contaminated by noise affecting their quality and the ability of identifying important pavement features. As a result of this study, a novel technique was developed to filter out noise present in pavement distress image. The second phase of the research is focused on the investigation of the sources of noise that can affect the digital pavement distress images.
Criteria for Evaluation of Image Quality, Sources of the Noise Affecting Pavement Images, and Novel Technique for Noise Filtration from Pavement Images Evaluation of Digital Imaging Systems Used in Highway Applications.
|Формат:|| Страниц 216|
Книга по Требованию
Использование геоинформационных систем для составления схемы...
Исходный картографический материал представляет собой карту масштаба 1:25000, которая была отсканирована в программе Adobe Fo oshop 6.0 и сохранена в файл с расширением JPEG. При запуске ArcView GIS 3.2а появляется окно, в котором делается выбор – создать новый проект или продолжить работу со старым. Я создаю новый проект. Далее мне предлагается добавить в мой проект данные. При согласии пользователя появляется диалоговое окно добавления темы, в котором есть несколько полей. Нас интересуют три из них. Первое поле – путь к файлу добавляемой темы, второе – проводник с деревом каталогов, третье – тип добавляемых данных с двумя вариантами выбора – добавить специфические данные ARCWIEV (Fea ure da a source) или графические данные (Image da a source). Моя задача – добавить в проект в качестве темы графический файл. Поэтому я выбираю Image da a source и указываю путь к файлу с отсканированным изображением. Передо мной открывается главное окно программы с интегрированным в нем окном менеджера проекта и окном view где отображаются визуальные темы проекта.
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