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检索条件"任意字段=Image Processing: Algorithms and Systems XII"

共 73 条记录，以下是11-20 订阅

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Automated processing of cytological and histological images

Automated processing of cytological and histological images

引用

International Conference on Perspective Technologies and Methods in MEMS Design (MEMSTECH)

作者： Oleh Berezsky Oleh Pitsun CIT Department Ternopil National Econimic University Ternopil UKRAINE

The paper analyzes well-known automated microscopy systems. The work presents the comparative analysis of low- and middle-designed algorithms. The adaptive module of pre-processing and image segmentation has been work... 详细信息

ISBN: (纸本)9781509014149

关键词： image segmentation Microscopy Biomedical imaging Algorithm design and analysis Computer vision Brightness

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AUTONOMOUS DETECTION OF ISO FADE POINT WITH COLOR LASER PRINTERS 12

引用

Conference on image Quality and System Performance xii

作者： Yan, Ni Maggard, Eric Fothergill, Roberta Jessome, Renee J. Allebach, Jan P. Purdue Univ Sch Elect & Comp Engn W Lafayette IN 47907 USA Hewlett Packard Corp Boise ID 83714 USA

ISBN: (纸本)9781628414868

image quality assessment is a very important field in image processing. Human observation is slow and subjective, it also requires strict environment setup for the psychological test 1. Thus developing algorithms to match desired human experiments is always in need. Many studies have focused on detecting the fading phenomenon after the materials are printed, that is to monitor the persistence of the color ink 2-4. However, fading is also a common artifact produced by printing systems when the cartridges run low. We want to develop an automatic system to monitor cartridge life and report fading defects when they appear. In this paper, we first describe a psychological experiment that studies the human perspective on printed fading pages. Then we propose an algorithm based on Color Space Projection and Kmeans clustering to predict the visibility of fading defects. At last, we integrate the psychological experiment result with our algorithm to give a machine learning tool that monitors cartridge life.

关键词： image Quality Printing Fading Color Space Projection K-means

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Statistical Shape Analysis for image Understanding and Object Recognition

Statistical Shape Analysis for Image Understanding and Objec...

引用

Conference on image processing - algorithms and systems xii

作者： Stiller, Peter F. Texas A&M Univ Dept Math College Stn TX 77843 USA

ISBN: (纸本)9780819499363

In order to analyze the effects of noise on certain recognition and reconstruction algorithms, including the sensitivity of the so-called object/image equations and object/image metrics, one needs to study probability and statistics on shape spaces. Work along these lines was pioneered by Kendall and has been the subject of many papers over the last twenty years. In this paper we extend some of those results to affine shape spaces and then use them to relate distributions on object shapes to corresponding distributions on image shapes.

关键词： Shape analysis Radon Statistical analysis 3D image processing image understanding Neodymium Object recognition Reconstruction algorithms Spherical lenses Matrices

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Refractory neural nets and vision

Refractory neural nets and vision

引用

Conference on image processing - algorithms and systems xii

作者： Fall, Thomas C. Kalyx Associates Los Gatos CA 95030 USA

ISBN: (纸本)9780819499363

Biological understandings have served as the basis for new computational approaches. A prime example is artificial neural nets which are based on the biological understanding of the trainability of neural synapses. In this paper, we will investigate features of the biological vision system to see if they can also be exploited. These features are 1) the neuron's refractory period - the period of time after the neuron fires before it can fire again and 2) the ocular microtremor which moves the retinal neural array relative to the image. The short term memory due to the refractory period allows the before and after movement views to be compared. This paper will discuss the investigation of the implications of these two features.

关键词： refractory period refractory neural nets short term memory ocular microtremors distributed processing

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PROBABILISTIC PERSON IDENTIFICATION IN TV NEWS PROGRAMS USING image WEB DATABASE

PROBABILISTIC PERSON IDENTIFICATION IN TV NEWS PROGRAMS USIN...

引用

Conference on image processing - algorithms and systems xii

作者： Battisti, F. Carli, M. Leo, M. Neri, A. Univ Roma TRE Dept Engn Rome Italy RadioLabs Rome Italy

ISBN: (纸本)9780819499363

The automatic labeling of faces in TV broadcasting is still a challenging problem. The high variability in view points, facial expressions, general appearance, and lighting conditions, as well as occlusions, rapid shot changes, and camera motions, produce significant variations in image appearance. The application of automatic tools for face recognition is not yet fully established and the human intervention is needed. In this paper, we deal with the automatic face recognition in TV broadcasting programs. The target of the proposed method is to identify the presence of a specific person in a video by means of a set of images downloaded from Web using a specific search key.

关键词： Annotation TV broadcast face detection face recognition

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Fibonacci Thresholding: Signal Representation and Morphological Filters

Fibonacci Thresholding: Signal Representation and Morphologi...

引用

Conference on image processing - algorithms and systems xii

作者： Grigoryan, Artyom M. Agaian, Sos S. Univ Texas San Antonio Dept Elect & Comp Engn San Antonio TX 78249 USA

ISBN: (纸本)9780819499363

A new weighted thresholding concept is presented, which is used for the set-theoretical representation of signals, the producing new signals containing a large number of key features that are in the original signals and the design new morphological filters. Such representation maps many operations of non binary signal and image processing to the union of the simple operations over the binary signals and images. The weighted thresholding is invariant under the morphological transformations, including the basic ones, erosion and dilation. The main idea of using the weighted thresholding is in the choice of the special level of thresholding on which we can concentrate all our attention for the future processing. Together with arithmetical thresholding the so-called Fibonacci levels are chosen because of many interesting properties;one of them is the effective decomposition of the median filter. Experimental results show that the Fibonacci thresholding is much promised and can be used for many applications, including the image enhancement, segmentation, and edge detection.

关键词： Binary signals thresholding image enhancement Fibonacci thresholding image segmentation (n,k,p)-Gray code cross-sections monotonic sequences

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Alpha-Rooting Method of Color image Enhancement by Discrete Quaternion Fourier Transform

Alpha-Rooting Method of Color Image Enhancement by Discrete ...

引用

Conference on image processing - algorithms and systems xii

作者： Grigoryan, Artyom M. Agaian, Sos S. Univ Texas San Antonio Dept Elect & Comp Engn San Antonio TX 78249 USA

ISBN: (纸本)9780819499363

This paper presents a novel method for color image enhancement based on the discrete quaternion Fourier transform. We choose the quaternion Fourier transform, because it well-suited for color image processing applications, it processes all 3 color components (R,G,B) simultaneously, it capture the inherent correlation between the components, it does not generate color artifacts or blending, finally it does not need an additional color restoration process. Also we introduce a new CEME measure to evaluate the quality of the enhanced color images. Preliminary results show that the a-rooting based on the quaternion Fourier transform enhancement method out-performs other enhancement methods such as the Fourier transform based a-rooting algorithm and the Multi scale Retinex. On top, the new method not only provides true color fidelity for poor quality images but also averages the color components to gray value for balancing colors. It can be used to enhance edge information and sharp features in images, as well as for enhancing even low contrast images. The proposed algorithms are simple to apply and design, which makes them very practical in image enhancement.

关键词： Discrete quaternion Fourier transform image enhancement alpha-rooting Fourier transform

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Parametric Rational Unsharp Masking for image Enhancement

Parametric Rational Unsharp Masking for Image Enhancement

引用

Conference on image processing - algorithms and systems xii

作者： Yin, Changzhe Zhou, Yicong Agaian, Sos Chen, C. L. Philip Univ Macau Dept Comp & Informat Sci Macau Peoples R China Univ Texas San Antonio Dept Elect & Comp Engn San Antonio TX 78249 USA

ISBN: (纸本)9780819499363

Unsharp masking is an effective enhancement tool to improve the visual quality of fine details in images. However, it also amplifies noisy and over-enhances steep edges. To address this problem, this paper proposes a parametric rational unsharp masking. It utilizes the horizontal and vertical gain factors to enhance image details in two directions independently. Experiments and comparisons are provided to demonstrate its excellent enhancement performance.

关键词： parametric rational unsharp masking image enhancement nonlinear filtering

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Multispectral imaging and image processing

Multispectral imaging and image processing

引用

Conference on image processing - algorithms and systems xii

作者： Klein, Julie Rhein Westfal TH Aachen Inst Imaging & Comp Vis D-52056 Aachen Germany

ISBN: (纸本)9780819499363

The color accuracy of conventional RGB cameras is not sufficient for many color-critical applications. One of these applications, namely the measurement of color defects in yarns, is why Prof. Til Aach and the Institute of image processing and Computer Vision (RWTH Aachen University, Germany) started off with multispectral imaging. The first acquisition device was a camera using a monochrome sensor and seven bandpass color filters positioned sequentially in front of it. The camera allowed sampling the visible wavelength range more accurately and reconstructing the spectra for each acquired image position. An overview will be given over several optical and imaging aspects of the multispectral camera that have been investigated. For instance, optical aberrations caused by filters and camera lens deteriorate the quality of captured multispectral images. The different aberrations were analyzed thoroughly and compensated based on models for the optical elements and the imaging chain by utilizing image processing. With this compensation, geometrical distortions disappear and sharpness is enhanced, without reducing the color accuracy of multispectral images. Strong foundations in multispectral imaging were laid and a fruitful cooperation was initiated with Prof. Bernhard Hill. Current research topics like stereo multispectral imaging and goniometric multispectral measurements that are further explored with his expertise will also be presented in this work.

关键词： Multispectral imaging multispectral camera filter wheel camera filter aberrations chromatic aberrations stereo multispectral imaging

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Generalized non-local means filtering for image denoising

Generalized non-local means filtering for image denoising

引用

Conference on image processing - algorithms and systems xii

作者： Dolui, Sudipto Patarroyo, Ivan C. Salgado Michailovich, Oleg V. Univ Penn Philadelphia PA 19104 USA Univ Waterloo Waterloo ON Canada

ISBN: (纸本)9780819499363

Non-local means (NLM) filtering has been shown to outperform alternative denoising methodologies under the model of additive white Gaussian noise contamination. Recently, several theoretical frameworks have been developed to extend this class of algorithms to more general types of noise statistics. However, many of these frameworks are specifically designed for a single noise contamination model, and are far from optimal across varying noise statistics. The NLM filtering techniques rely on the definition of a similarity measure, which quantifies the similarity of two neighbourhoods along with their respective centroids. The key to the unification of the NLM filter for different noise statistics lies in the definition of a universal similarity measure which is guaranteed to provide favourable performance irrespective of the statistics of the noise. Accordingly, the main contribution of this work is to provide a rigorous statistical framework to derive such a universal similarity measure, while highlighting some of its theoretical and practical favourable characteristics. Additionally, the closed form expressions of the proposed similarity measure are provided for a number of important noise scenarios and the practical utility of the proposed similarity measure is demonstrated through numerical experiments.

关键词： Non local means similarity measure neighbourhood filtering patch similarity

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