876 research outputs found
Robot autonomous navigation
Autonomous vehicle navigation is a very popular research area in the vision and control field. Based on Prof. Dickmanns' philosophy, we implement a navigation algorithm on thc small robot. The robot can rely on its eyes (the camera mounted on thc top of the robot) and control its wheels to walk through the sub-basement hallways of Caltech Moore Lab building. The speed we achieve is robot's mechanical maximum speed 0.5 m/s
Detecting Simultaneous Integer Relations for Several Real Vectors
An algorithm which either finds an nonzero integer vector for
given real -dimensional vectors such
that or proves that no such integer vector with
norm less than a given bound exists is presented in this paper. The cost of the
algorithm is at most exact arithmetic
operations in dimension and the least Euclidean norm of such
integer vectors. It matches the best complexity upper bound known for this
problem. Experimental data show that the algorithm is better than an already
existing algorithm in the literature. In application, the algorithm is used to
get a complete method for finding the minimal polynomial of an unknown complex
algebraic number from its approximation, which runs even faster than the
corresponding \emph{Maple} built-in function.Comment: 10 page
Generalized Batch Normalization: Towards Accelerating Deep Neural Networks
Utilizing recently introduced concepts from statistics and quantitative risk
management, we present a general variant of Batch Normalization (BN) that
offers accelerated convergence of Neural Network training compared to
conventional BN. In general, we show that mean and standard deviation are not
always the most appropriate choice for the centering and scaling procedure
within the BN transformation, particularly if ReLU follows the normalization
step. We present a Generalized Batch Normalization (GBN) transformation, which
can utilize a variety of alternative deviation measures for scaling and
statistics for centering, choices which naturally arise from the theory of
generalized deviation measures and risk theory in general. When used in
conjunction with the ReLU non-linearity, the underlying risk theory suggests
natural, arguably optimal choices for the deviation measure and statistic.
Utilizing the suggested deviation measure and statistic, we show experimentally
that training is accelerated more so than with conventional BN, often with
improved error rate as well. Overall, we propose a more flexible BN
transformation supported by a complimentary theoretical framework that can
potentially guide design choices.Comment: accepted at AAAI-1
Analysis of Mobile Game Intellectual Property Marketing Strategy: A Case Study of Honor of Kings
The mobile game market is now gradually forming a unique ecological industry chain. Game parties are beginning to look beyond the game experience and focus on building mature game IPs. By creating specific IP to drive the game’s peripheral revenue, strengthen the emotional connection with game users, and achieve the purpose of long-term development. Looking at the domestic market, Honor of Kings, as a phenomenal mobile game in China, its IP development and marketing are of reference learning significance. In this paper, we selected Honor of Kings as the research object, and we collected data through both questionnaire surveys and interviews, using SPSS for statistical analysis. The research analyzed its IP marketing strategy and effect and searched for the factors which affect its IP marketing effect. It finds that the impact of Honor of Kings IP marketing is influenced by the degree of perfection of Honor of Kings worldview, i.e., IP connotation and local cultural awareness. At the same time, we analyzed the IP development process and marketing strategy of Honor of Kings in combination, pointed out its advantages and shortcomings, and gave suggestions to provide new ideas for IP marketing of other game companies
Towards Detection of Human Motion
Detecting humans in images is a useful application
of computer vision. Loose and textured clothing, occlusion
and scene clutter make it a difficult problem because
bottom-up segmentation and grouping do not always work.
We address the problem of detecting humans from their motion
pattern in monocular image sequences; extraneous motions
and occlusion may be present. We assume that we may
not rely on segmentation, nor grouping and that the vision
front-end is limited to observing the motion of key points
and textured patches in between pairs of frames. We do not
assume that we are able to track features for more than two
frames. Our method is based on learning an approximate
probabilistic model of the joint position and velocity of different body features. Detection is performed by hypothesis testing on the maximum a posteriori estimate of the pose and motion of the body. Our experiments on a dozen of walking sequences indicate that our algorithm is accurate
and efficient
3DCFS : Fast and robust joint 3D semantic-instance segmentation via coupled feature selection
We propose a novel fast and robust 3D point clouds segmentation framework via coupled feature selection, named 3DCFS, that jointly performs semantic and instance segmentation. Inspired by the human scene perception process, we design a novel coupled feature selection module, named CFSM, that adaptively selects and fuses the reciprocal semantic and instance features from two tasks in a coupled manner. To further boost the performance of the instance segmentation task in our 3DCFS, we investigate a loss function that helps the model learn to balance the magnitudes of the output embedding dimensions during training, which makes calculating the Euclidean distance more reliable and enhances the generalizability of the model. Extensive experiments demonstrate that our 3DCFS outperforms state-of-the-art methods on benchmark datasets in terms of accuracy, speed and computational cost
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