Results 11 to 20 of about 33,816,015 (256)

Automatic crowd density and motion analysis in airborne image sequences based on a probabilistic framework [PDF]

open access: yes, 2011
Real-time monitoring of crowded regions has crucial importance to avoid overload of people in certain areas. Understanding behavioral dynamics of large people groups can also help to estimate future status of underground passages, public areas, or ...
Reinartz, Peter   +3 more
core   +1 more source

A spatial attentive and temporal dilated (SATD) GCN for skeleton‐based action recognition

open access: yesCAAI Transactions on Intelligence Technology, 2022
Current studies have shown that the spatial‐temporal graph convolutional network (ST‐GCN) is effective for skeleton‐based action recognition. However, for the existing ST‐GCN‐based methods, their temporal kernel size is usually fixed over all layers ...
Jiaxu Zhang   +6 more
doaj   +1 more source

Details preserved unsupervised depth estimation by fusing traditional stereo knowledge from laparoscopic images

open access: yesHealthcare Technology Letters, 2019
Depth estimation plays an important role in vision-based laparoscope surgical navigation systems. Most learning-based depth estimation methods require ground truth depth or disparity images for training; however, these data are difficult to obtain in ...
Huoling Luo, Qingmao Hu, Fucang Jia
doaj   +1 more source

Image fusion for dynamic contrast enhanced magnetic resonance imaging [PDF]

open access: yes, 2004
Twellmann T, Saalbach A, Gerstung O, Leach MO, Nattkemper TW. Image fusion for dynamic contrast enhanced magnetic resonance imaging. Biomed Eng Online. 2004;3(1): 35.BACKGROUND: Multivariate imaging techniques such as dynamic contrast-enhanced magnetic ...
Nattkemper, Tim Wilhelm ; https://orcid.org/   +23 more
core   +2 more sources

Face anti‐spoofing from the perspective of data sampling

open access: yesElectronics Letters, 2023
Without deploying face anti‐spoofing countermeasures, face recognition systems can be spoofed by presenting a printed photo, a video, or a silicon mask of a genuine user.
Usman Muhammad, Mourad Oussalah
doaj   +1 more source

Progressive mesh-based motion estimation using partial refinement [PDF]

open access: yes, 2006
A technique for performing progressive mesh-based motion estimation in a layered fashion is presented. Motion compensation based on image warping provides a block prediction free of block artifacts.
Park, Heechan   +5 more
core   +1 more source

Multi‐stream adaptive spatial‐temporal attention graph convolutional network for skeleton‐based action recognition

open access: yesIET Computer Vision, 2022
Skeleton‐based action recognition algorithms have been widely applied to human action recognition. Graph convolutional networks (GCNs) generalize convolutional neural networks (CNNs) to non‐Euclidean graphs and achieve significant performance in skeleton‐
Lubin Yu   +3 more
doaj   +1 more source

Local affine image matching and synthesis based on structural patterns [PDF]

open access: yes, 2010
A general purpose block-to-block affine transformation estimator is described. The estimator is based on Fourier slice analysis and Fourier spectral alignment.
Park, Heechan   +2 more
core   +1 more source

Motion computation and visual orientation in flies [PDF]

open access: yes, 1993
Egelhaaf M, Borst A. Motion computation and visual orientation in flies. Comparative Biochemistry and Physiology, A: Comparative Physiology. 1993;104(4):659-673.Visual orientation greatly relies on the evaluation of the motion patterns received by the ...
Egelhaaf, M.   +3 more
core   +1 more source

A New Full-Reference Image Quality Metric for Motion Blur Profile Characterization

open access: yesIEEE Access, 2021
Motion blur is common in images captured by handheld devices, arising from hand, device and/or object motion. To restore sharp images from the images degraded by the motion, it is extremely important to assess the quality of the captured image and its ...
Mohammad Abdullah-Al-Mamun   +2 more
doaj   +1 more source

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