نتایج جستجو برای: spatial resolution

تعداد نتایج: 600900  

Journal: :Computers in biology and medicine 2010
Elena Prieto Josep María Martí-Climent Javier Arbizu Puy Garrastachu Inés Domínguez-Prado Gemma Quincoces M. José García-Velloso P. Lecumberri Marisol Gómez-Fernández José Ángel Richter

PURPOSE In order to measure spatial resolution of a PET tomograph in clinical conditions, this study describes and validates a method based on the recovery coefficient, a factor required to compensate underestimation in measured radioactivity concentration for small structures. METHODS In a PET image, the recovery factors of radioactive spheres were measured and their comparison with simulate...

Journal: :J. Electronic Imaging 2005
Wai-Yin Ng Tsz-Yam Lau Lap-Ming Kwong

Coded as conventional color-map addresses, a colormapped image can be decoded only when a full color map address is available. We present the first known scheme that adds progression capability in spatial resolution as well as color resolution, enabling more flexible progression of color-mapped images. During coding, approximate pixel colors are keyed with truncated versions of the original col...

2010
Jun Li

Spatial quality and spectral quality are the two important indexes that are used to evaluate the quality of any fused image. Most of the existing methods for this purpose, however, considered only the spectral quality except for that proposed by Zhou et al., while the latter cannot be used to compare directly the spatial resolution between the fused image and original high-resolution. A new spa...

Journal: :Comput. Graph. Forum 2016
Daniel S. Jeon Inchang Choi Min H. Kim

The coded aperture snapshot spectral imaging (CASSI) architecture has been employed widely for capturing hyperspectral video. Despite allowing concurrent capture of hyperspectral video, spatial modulation in CASSI sacrifices image resolution significantly while reconstructing spectral projection via sparse sampling. Several multiview alternatives have been proposed to handle this low spatial re...

2012
Kavita Tewari Leena Shah

Image fusion is one of the important techniques to enhance image information of remote sensing. In order to adequately make use of all kinds of remote sensing images information such as Panchromatic and threeband multi-spectral images, a novel remote sensing image fusion scheme based on wavelet transform is proposed. The fusion of multispectral (MS) and panchromatic (PAN) images, with complemen...

Journal: :The Journal of the Acoustical Society of America 1985

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