نتایج جستجو برای: visual pattern image coding

تعداد نتایج: 1121596  

2002
Ligang Lu Zhou Wang Jack Kouloheris Alan C. Bovik

This paper introduces our recent research work on the development of a scalable foveated visual information coding and communication system, which follows two emerging trends in visual communication research. One is to design rate scalable image and video codecs, which allow the extraction of coded visual information at continuously varying bit rates from a single compressed bitstream. The othe...

Journal: :معماری و شهرسازی آرمان شهر 0
mehdi baba abbasi master of urban design, department of architecture and urbanism, islamic azad university of qazvin, iran. supported researcher by the centre of studies and planning of tehran. mohammad reza pourjafar professor of urban planning and design, tarbiat- modarres university, tehran, iran.

urban spaces are like a dramatic stage, in which buildings and street’s facades are the actors. while people are passing through streets, they will communicate the information with the environment, as well as, explore and study the spaces. people transfer the greatest number of information from the urban space and the surrounding environment through their visual senses. hiking determines one of...

2000
Gerald Schaefer Guoping Qiu

It has been argued that future image coding techniques should allow for "midstream access", i.e. allow image query, retrieval, and modification to proceed on the compressed representation [18]. In a recent work [1], we introduced the colour visual pattern image coding (CVPIC) technique for colour image compression. An image is divided into blocks and each block coded locally by mapping it to on...

2002
Peter Bergström

Abstract. An image coding scheme which combines transform coding with a human visual system (HVS) model has been developed. The system includes an eye tracker to pick up the point of regard of a single viewer. One can then utilize that the acuity of the HVS is lower in the peripheral vision than in the central part of the visual field. A model of the decreasing acuity of the HVS which can be ap...

Journal: :The Journal of the Institute of Image Information and Television Engineers 1997

2002
Ligang Lu Zhou Wang Alan C. Bovik

This paper introduces our recent research work on the development of a scalable foveated visual information coding and communication system, which follows two emerging trends in visual communication research. One is to design rate scalable image and video codecs, which allow the extraction of coded visual information at continuously varying bit rates from a single compressed bitstream. The othe...

2015
Qiuping Jiang Feng Shao

The issue of visual discomfort has long been restricting the develop‐ ment of advanced stereoscopic 3D video technology. Bolstered by the require‐ ment of highly comfortable three-dimensional (3D) content service, predicting the degree of visual comfort automatically with high accuracy has become a topic of intense study. This paper presents a novel visual comfort assessment (VCA) metric based ...

1998
Jin Li

The embedded coder has an attractive feature that the coding bitstream can be truncated later at any point and still decoded a perceptible image. It is common in conventional coding to improve the subjective quality of the coded image through adjusting the quantization step size inversely proportional to a set of visual weights. However, such scheme will not be effective in the embedded coder a...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد یزد - دانشکده برق و الکترونیک 1392

امروزه تخمین حرکت بلوک در تصاویر بر اساس روش هایی که تمام جزئیات را شامل می شوند، تبدیل به یک مبحث فراگیر در شاخه ی پردازش تصویر گشته است. چرا که از جمله ی روش هایی به حساب می آید که باعث فشردگی و کاهش حجم داده های تصویری می گردد. جهت تحقّق این هدف، الگوریتم های متفاوتی ارائه شده اند. الگوریتم های جستجوی محلی، جستجوی پیشگویانه و... که با توجه به نیاز مسأله انتخاب و مورد استفاده قرار می گیرند، از...

2013
Jiemi Zhang Chenxia Wu Deng Cai Jianke Zhu

Bag-of-Words approach has played an important role in recent works for image classification. In consideration of efficiency, most methods use kmeans clustering to generate the codebook. The obtained codebooks often lose the cluster size and shape information with distortion errors and low discriminative power. Though some efforts have been made to optimize codebook in sparse coding, they usuall...

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