نتایج جستجو برای: window size

تعداد نتایج: 611317  

2007
Kan’ya Sasaki Seiji Kameda Hiroshi Ando Mamoru Sasaki Atsushi Iwata

In the intensity-based stereo matching algorithm, window-based and coarse-to-fine algorithms are known as typical approaches. The window-based algorithm matches intensity values within windows between two stereo images. The conventional window-based algorithms, however, face a trade-off between error rates of the disparity map in disparity continuity and discontinuity regions due to the window ...

Ayda Montaser Koohsari, Behrouz Mohammad Kari Rima Fayaz,

As part of sustainable architecture principles and practices, designers need to define building's architectural requirements based on climatic conditions, environmental preservation and reduction in energy consumption. The natural energy sources such as solar radiation affect thermal and lighting performances of buildings depending on its facade characteristics. Traditionally, buildings thermal...

2006
Maria F. Trujillo Ebroul Izquierdo

for disparity estimation is introduced. In the proposed approach the size of the matching window is adapted according to the spatial variability of the matching areas. That is, the window size is constrained by the variations of the image intensity. A modified semivariogram function is proposed to measure the spatial variability of concerned sampling positions. Results of computer experiments a...

Journal: :Genome research 2000
A Nekrutenko W H Li

Using large amounts of long genomic sequences, we studied the compositional patterns of eukaryotic genomes. We developed a simple measure, the compositional heterogeneity (or variability) index, to compare the differences in compositional heterogeneity between long genomic sequences. The index measures the average difference in GC content between two adjacent windows normalized by the standard ...

Journal: :Attention, Perception, & Psychophysics 2010

2009
Ammar M. Alhosainy Ehab F. Badran

In this paper, a novel improvement idea in image restoration by Non-Local means (NL-means) filter is proposed. Most of special image denoising techniques require a region size called neighborhood window for denoising, window-size selection is usually done by visual inspection based upon experience or hit and trial. It is shown in this paper that varying the window-size for each pixel according ...

Journal: :AJR. American journal of roentgenology 1981
C E Seibert J E Barnes J N Dreisbach W B Swanson R J Heck

Computed tomography (CT) using metrizamide is a valuable tool in the neuroradiologic evaluation of the spinal cord, but CT must be used with care when measuring object size because size may vary with different window center (level) settings. A simple method to determine appropriate window center (level) settings during CT object measurement is described. A polystyrene core with a Teflon outer c...

Journal: :European journal of ultrasound : official journal of the European Federation of Societies for Ultrasound in Medicine and Biology 2000
N Aydin H S Markus

The fast Fourier transform (FFT), which is employed by all commercially available ultrasonic systems, provides a time-frequency representation of Doppler ultrasonic signals obtained from blood flow. The FFT assumes that the signal is stationary within the analysis window. However, the presence of short duration embolic signals invalidates this assumption. For optimal detection of embolic signal...

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