Xem 1-20 trên 128 kết quả Image quality
  • (BQ) Part 2 the book "Clark's essential physics in imaging for radiographers" presents the following contents: Principles of radiation detection and image formation, image quality, radiation dose and exposure indicators, image display and manipulation in medical imaging, radiation protection and safety,...

    pdf107p thangnamvoiva4 01-07-2016 2 1   Download

  • Visual quality assessment is an interdisciplinary topic that links image/video processing, psychology and physiology. Many engineers are familiar with the image/video processing; transmission networks side of things but not with the perceptual aspects pertaining to quality. Digital Video Quality first introduces the concepts of human vision and visual quality. Based on these, specific video quality metrics are developed and their design is presented. These metrics are then evaluated and used in a number of applications, including image/video compression, transmission and watermarking.

    pdf192p beobobeo 01-08-2012 31 8   Download

  • The quality assurance teams and managers supported the evolution of the breast screening programme locally, and professional quality assurance groups were developed with the relevant associations and royal colleges at a national level. In 1990, a new post of national coordinator of the NHSBSP was established, based at one of the regional heath authori- ties. Mrs Julietta Patnick at the Trent Region in Sheffield was appointed, and she is now the Director of the NHS Cancer Screening Programmes, which includes the NHSBSP.

    pdf432p taisaokhongthedung 07-01-2013 29 6   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: No-reference image quality metric based on image classification

    pdf11p dauphong12 07-02-2012 13 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Image Quality Assessment Using the Joint Spatial/Spatial-Frequency Representation

    pdf8p dauphong20 10-03-2012 16 2   Download

  • In January 2004, the Center for Gamma-Ray Imaging (CGRI), a research resource funded by the National Institute of Biomedical Imaging and Bioengineering (NIBIB), hosted “The Workshop on Small-Animal SPECT” in Tucson, Arizona. Over 80 people from around the world attended this workshop, which included numerous short courses and contributed papers. The primary objective of the workshop was to provide education in some of the key technologies and applications that have been going on in the Center....

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  • The implementation of active pixel based image sensors in CMOS technology is becoming increasingly important for producing imaging systems that can be manufactured with low cost, low power, simple interface, and with good image quality. The major obstacle in the design of CMOS imagers is Fixed Pattern Noise (FPN) and Signal-to-Noise-Ratio (SNR) of the video output.

    pdf102p xuantoan_bk 09-02-2014 20 2   Download

  • Ultrasound imaging is considered one of the most powerful techniques for medical diagnosis and is often preferred over other medical imaging modalities because of noninvasive, portable, versatile and low-cost properties (Webb, 2002; Abd-Elmoniem, 2002; Porter, 2001; Shekhar, 2002). A fundamental problem in the field of ultrasound imaging is the speckle noise influence, which is a major limitation on image quality inultrasound imaging.

    pdf17p thaodien102 06-11-2015 4 1   Download

  • (BQ) Part 1 book "Practical urological ultrasound" presents the following contents: History of ultrasound in urology, physical principles of ultrasound, bioeffects and safety, maximizing image quality - User dependent variables, renal ultrasound, scrotal ultrasound.

    pdf131p thangnamvoiva3 01-07-2016 1 1   Download

  • A three-stage method for compressing bi-level line-drawing images is proposed. In the first stage, the raster image is vectorized using a combination of skeletonizing and line tracing algorithm. A feature image is then reconstructed from the extracted vector elements. In the second stage, the original image is processed by a feature-based filter for removing noise near the borders of the extracted line elements. This improves the image quality and results in more compressible raster image. In the final stage, the filtered raster image is compressed using the baseline JBIG algorithm....

    pdf6p kienk6e 31-03-2011 49 14   Download

  • Colour image processing is divided into two main areas: full colour and pseudo-colour processing. In the former group, the images are normally acquired with a full colour sensor such as a CCTV camera. In the second group, a colour is assigned to a specific monochrome intensity or combination of intensities. People perceive colours that actually correspond to the nature of the light reflected from the object. The electromagnetic spectrum of the chromatic light falls in the range of 400-700 nm.

    pdf91p aries23 29-09-2012 43 11   Download

  • Because of the availability of powerful computational techniques, new modality techniques such as Computer-Aided Tomography (CAT), Magnetic Resonance Imaging (MRI) and others, and because of the new techniques of imaging processing (machine vision), the lives of many patients will be saved, and the quality of all our lives improved. This marriage of powerful computer technology and medical imaging has spawned a new and growing generation of young dynamic doctors who hold PhDs in physics and/or computer science, along with their MDs.

    pdf398p echbuon 02-11-2012 35 9   Download

  • There are six sections in this book. The first section presents basic image processing techniques, such as image acquisition, storage, retrieval, transformation, filtering, and parallel computing. Then, some applications, such as road sign recognition, air quality monitoring, remote sensed image analysis, and diagnosis of industrial parts are considered.

    pdf296p kimngan_1 05-11-2012 31 9   Download

  • Others are more avowedly ‘political’ or polemical in intent. The ‘artistic’ and the ‘political’ are far from separate categories, however. Formal experiment and departure from dominant conventions is, potentially, a major resource for the deconstruction of dominant ideologies.

    pdf128p khanhchilam 01-04-2013 14 6   Download

  • Covering the principles of radiographic technique and interpretation for dogs, cats, and horses, Textbook of Veterinary Diagnostic Radiology, 6th Edition helps you develop proficiency in diagnostic skills. High-quality radiographic images accompany clear coverage of diagnostic radiology, ultrasound, MRI, and CT, as well as patient positioning, radiograp

    pdf102p mientrung102 30-01-2013 19 5   Download

  • The number of diagnostic nuclear medicine procedures has grown in the fi rst few years of the new century. Nuclear cardiology has diversifi ed, stimulating development of new equipment and imaging protocols. Gated myocardial perfusion imaging completed with quantifi cation is now a standard procedure. Faster computers have led to improved reconstruction techniques, higher image quality, increased patient throughput and more automated acquisition and processing protocols.

    pdf355p echbuon 02-11-2012 17 2   Download

  • The National Academy of Sciences is a private, nonprofit, self-perpetuating society of distinguished scholars engaged in scientific and engineering research, dedicated to the furtherance of science and technology and to their use for the general welfare. Upon the authority of the charter granted to it by the Congress in 1863, the Academy has a mandate that requires it to advise the federal government on scientific and technical matters. Dr. Ralph J. Cicerone is president of the National Academy of Sciences....

    pdf241p taurus23 27-09-2012 19 1   Download

  • We query Web Image search engines with words (e.g., spring) but need images that correspond to particular senses of the word (e.g., flexible coil). Querying with polysemous words often yields unsatisfactory results from engines such as Google Images. We build an image search engine, I DIOM, which improves the quality of returned images by focusing search on the desired sense. Our algorithm, instead of searching for the original query, searches for multiple, automatically chosen translations of the sense in several languages. ...

    pdf4p hongphan_1 15-04-2013 15 1   Download

  • Medical ultrasound imaging is a technique that has become much more prevalent than other medical imaging techniques since it is more accessible, less expensive, safe, simpler to use and produces images in the real time. However, images produced by an ultrasound imaging system, must be of sufficient quality to provide accurate clinical interpretation.

    pdf21p thaodien102 06-11-2015 5 1   Download

  • The quality of phased array and synthetic aperture ultrasonic images is limited by several factors determined by the sound propagation physics and diffraction laws. Image quality is mainly determined by: Resolution, which depends on signal bandwidth (in the axial direction) and on the aperture extent (in the lateral direction); Dynamic range, which is bounded by the ratio of the main to the sidelobes level and is related to the smallest features detection capability.

    pdf25p thaodien102 06-11-2015 7 1   Download

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