Pii: S0895-6111(98)00042-1
نویسندگان
چکیده
In this work, lossless grayscale image compression methods are compared on a medical image database. The database contains 10 different types of images with bit rates varying from 8 to 16 bits per pixel. The total number of test images was about 3000, originating from 125 different patient studies. Methods used for compressing the images include seven methods designed for grayscale images and 18 ordinary general-purpose compression programs. Furthermore, four compressed image file formats were used. The results show that the compression ratios strongly depend on the type of the image. The best methods turned out to be TMW, CALIC and JPEG-LS. The analysis step in TMW is very time-consuming. CALIC gives high compression ratios in a reasonable time, whereas JPEG-LS is nearly as effective and very fast. q 1998 Elsevier Science Ltd. All rights reserved
منابع مشابه
Pii: S0895-6111(00)00061-6
This text summarizes the main technical problems related to 3D image reconstruction in PET, SPECT and CT, and provides references to a selection of key papers and to review papers. q 2001 Elsevier Science Ltd. All rights reserved.
متن کاملPii: S0895-6111(00)00059-8
This paper is written for physicians and presents basic principles of image reconstruction in nuclear medicine. Both analytical and iterative methods are discussed without rigorous mathematics. q 2001 Elsevier Science Ltd. All rights reserved.
متن کاملPii: S0895-6111(98)00051-2
We present a knowledge-based approach to segmentation and analysis of the lung boundaries in chest X-rays. Image edges are matched to an anatomical model of the lung boundary using parametric features. A modular system architecture was developed which incorporates the model, image processing routines, an inference engine and a blackboard. Edges associated with the lung boundary are automaticall...
متن کاملPii: S0895-6111(00)00034-3
Three-dimensional (3D) computer reconstruction is an ideal tool for evaluating the centralized pathology of mammalian spinal cord injury (SCI) where multiple anatomical features are embedded within each other. Here, we evaluate three different reconstruction algorithms to three-dimensionally visualize SCIs. We also show for the first time, that determination of the volume and surface area of pa...
متن کاملPii: S0895-6111(98)00059-7
This study investigates the potential of microscopic Magnetic Resonance Imaging to obtain information for 3D digital atlases of mouse development using fixed samples. Fixed samples allow direct comparison with already published atlases and provide a testing ground for future in vivo efforts. 3D MR images of mouse embryos (dpc 6.5-16) illustrate that the necessary contrast and level of detail is...
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