In this paper, we present an image compression scheme based on the automatic segmentation of regions of interest (RoI) and a lossy wavelet compression algorithm adapted to this segmentation. Quasi-lossless compression is applied to the RoI while lossy compression is allowed outside the RoI, preserving at best the visual quality of the decoded image within a deened RoI. In fact, for diagnostic a...

The JPEG2000 standard defines two methods for region of interest (ROI) coding, the maximum shift and the general scaling. In the maximum shift method, an ROI can have any shape that does not need to be transmitted to the decoder, but does not have the flexibility to select an arbitrary scaling value to compromise the ROI quality compared with the background. The general scaling based method sup...

Return on Investment (ROI) is one of the most popular performance measurement and evaluation metrics used in business analysis. ROI analysis (when applied correctly) is a powerful tool for evaluating existing information systems and making informed decisions on software acquisitions and other projects. Decades ago, ROI was conceived as a financial term and defined as a concept based on a rigoro...

A small detector or limited gantry rotation angles may cause data truncation, in which case the entire object cannot be completely reconstructed. However, a small region of interest (ROI) may be recoverable in certain truncation situations. Two analytical methods have been proposed for exact ROI reconstruction. Here we evaluate the capability of ROI reconstruction using an maximum-likelihood ex...

This paper presents a short survey and analysis of a variety of evaluation methods, which are potentially useful for strategic software design. The methods described address a broad range of concepts of value. The paper complements previous economics driven software engineering research work on standard accounting techniques. A summary account of the underlying principles of each method is give...

introduction: the limited resolution of the imaging system causes partial volume effects (pves). these results in spreading of image counts to the neighboring pixels. this phenomenon is called spill-out effect. this study aimed at quantifying pves using imagej. methods:technetium-99m solution of concentration of 74 kbq/ml was filled into spheres a, b and c of diameters: 26 mm, 20 mm and 16 mm r...

introduction:we evaluated the performance of muscle perfusion scan (mps) to assess muscle perfusion reserve (mpr) for prediction of incident diabetic foot ulcerations (dfu). methods: we recruited 41 diabetic patients without any history of dfu. five mci 99mtc-mibi was injected intravenously during repetitive dorsal and plantar right foot flexions. then posterior calves were imaged and the count...

A region-of-interesting (ROI) image coding based on wavelet transform that can control the image quality between ROI and region-of-non-interesting (non-ROI) under a constrained quantity of information will be proposed in this paper. We introduce a scalar parameter referred as to control, and is ratio of the quality ROI to non-ROI and is relative measure. Assignment of the total quantity of info...