Image motion feature extraction for recognition of aggressive behaviors among group-housed pigs

2017 ◽  
Vol 142 ◽  
pp. 380-387 ◽  
Author(s):  
Chen Chen ◽  
Weixing Zhu ◽  
Changhua Ma ◽  
Yizheng Guo ◽  
Weijia Huang ◽  
...  
Keyword(s):  
Feature Extraction ◽  
Image Motion ◽  
Aggressive Behaviors ◽  
Motion Feature

RPCA-Based High Resolution Through-the-Wall Human Motion Feature Extraction and Classification

2021 ◽  
pp. 1-1
Author(s):  
Qiang An ◽  
Shuoguang Wang ◽  
Lei Yao ◽  
Wenji Zhang ◽  
Hao Lv ◽  
...  
Keyword(s):  
Feature Extraction ◽  
High Resolution ◽  
Human Motion ◽  
Motion Feature

scholarly journals Parallel Channels for Motion Feature Extraction in the Pretectum and Tectum of Larval Zebrafish

2019 ◽  
Author(s):  
Kun Wang ◽  
Julian Hinz ◽  
Yue Zhang ◽  
Tod R. Thiele ◽  
Aristides Arrenberg
Keyword(s):  
Feature Extraction ◽  
Motion Feature ◽  
Larval Zebrafish ◽  
Parallel Channels

scholarly journals Micro-Motion Feature Extraction of a Rotating Target Based on Interrupted Transmitting and Receiving Pulse Signal in an Anechoic Chamber

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1028
Author(s):  
Feng Zhao ◽  
Xiaobin Liu ◽  
Zhiming Xu ◽  
Yuan Liu ◽  
Xiaofeng Ai
Keyword(s):  
Feature Extraction ◽  
Coupling Effect ◽  
Pulse Repetition Frequency ◽  
Pulse Signal ◽  
Anechoic Chamber ◽  
Repetition Frequency ◽  
Motion Feature ◽  
Whole Process ◽  
Micro Motion ◽  
Rotating Target

The pulse signal is widely used in micro-motion feature extraction of rapidly rotating targets as its pulse repetition frequency (PRF) can be high. However, when the pulse signal is implemented in a range-limited anechoic chamber for micro-motion feature extraction, the transmitted and reflected pulse signals may be coupled at the receiver. To solve this problem, the interrupted transmitting and receiving (ITR) method is applied to transmit the pulse signal with hundreds of sub-pulses. The target echo can be received when the sub-pulse is not transmitted. Hence, it avoids the coupling effect of transmitted signals and echoes. Then, the whole process of micro-motion feature extraction for rotating target is proposed based on the ITR method. At last, the simulations and experiments verify that the rotating target micro-Doppler can be extracted by the ITR pulse signal.

scholarly journals Parallel channels for motion feature extraction in the pretectum and tectum of larval zebrafish

2019 ◽  
Author(s):  
Kun Wang ◽  
Julian Hinz ◽  
Yue Zhang ◽  
Tod R. Thiele ◽  
Aristides B Arrenberg
Keyword(s):  
Feature Extraction ◽  
Visual Field ◽  
Prey Capture ◽  
Receptive Fields ◽  
Lower Visual Field ◽  
Motion Feature ◽  
Hunting Behaviour ◽  
Sensorimotor Transformations ◽  
Visual Areas ◽  
Tectal Neurons

AbstractNon-cortical visual areas in vertebrate brains extract different stimulus features, such as motion, object size and location, to support behavioural tasks. The optic tectum and pretectum, two primary visual areas, are thought to fulfil complementary biological functions in zebrafish to support prey capture and optomotor stabilisation behaviour. However, the adaptations of these brain areas to behaviourally relevant stimulus statistics are unknown. Here, we used calcium imaging to characterize the receptive fields of 1,926 motion-sensitive neurons in diencephalon and midbrain. We show that many caudal pretectal neurons have large receptive fields (RFs), whereas RFs of tectal neurons are smaller and mostly size-selective. RF centres of large-size RF neurons in the pretectum are predominantly located in the lower visual field, while tectal neurons sample the upper-nasal visual field more densely. This tectal visual field sampling matches the expected prey item locations, suggesting that the tectal magnification of the upper-nasal visual field might be an adaptation to hunting behaviour. Finally, we probed optomotor responsiveness and found that even relatively small stimuli drive optomotor swimming, if presented in the lower-temporal visual field, suggesting that the pretectum preferably samples information from this region on the ground to inform optomotor behaviour. Our characterization of the parallel processing channels for non-cortical motion feature extraction provides a basis for further investigation into the sensorimotor transformations of the zebrafish brain and its adaptations to habitat and lifestyle.

scholarly journals Micro-motion feature extraction of narrow-band radar target based on ROMP

2019 ◽  
Vol 2019 (21) ◽  
pp. 7860-7863
Author(s):  
Shuai Chen ◽  
Cunqian Feng ◽  
Xuguang Xu
Keyword(s):  
Feature Extraction ◽  
Narrow Band ◽  
Radar Target ◽  
Motion Feature ◽  
Micro Motion
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