نتایج جستجو برای: image quality evaluation
تعداد نتایج: 1812075 فیلتر نتایج به سال:
Photogrammetry is the main access to obtain geospatial information , the quality of the results will directly affect the follow-up results of the quality of surveying and mapping . Therefore , We need a comprehensive aerial photographic quality inspection results . Correct evaluation of the quality of digital images is an important but difficult to solve the research topic . Many of the current...
چکیده ندارد.
Evaluation of vegetation cover by using the remote sensing data can provide enhanced results with less time and expense. In this paper, we propose a new automatic algorithm for detection of vegetation and shadow regions in high-resolution satellite/aerial images. It uses only color channels of the image and involves two modeling and evaluation phases. In the modeling phase, after extracting col...
Background: Cone-beam computed tomography (CBCT) scanners for image-guided radiotherapy are in clinical use today, but there has been no consensus on uniform acceptance to verify the CBCT image quality yet. The present work proposed new methods to fully evaluate the performance of CBCT in its three-dimensional (3D) reconstruction space. Materials and Methods: Compared to the traditional methods...
Blur is a key factor in the perception of image quality, leading to spread of edges in images. The quantity of feature points extracted from images can represent image shape changes. Compared with sharp images, blurred images tend to contain less feature points, and the reduction of feature points is related to blur. In this paper, we propose a new blind blur assessment metric based on feature ...
materials and methods one hundred sixty five units which provide mammography examination services were included in the audit. samples of mammographic examinations conducted between july 1st and december 31st, 2012 were evaluated. auditors completed web-based evaluation forms, including quality parameters and descriptive statistics on the patients and institutions. conclusion the audit showed si...
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