151 results about "Gesture classification" patented technology

An apparatus for recognizing gestures in a picture includes a Hough transformer configured to identify elements in the picture or in a pre-processed version of the picture as identified gesture elements and to obtain information about the identified gesture elements.

The apparatus further includes a gesture description creator configured to obtain a gesture description while using the information about the identified gesture elements.

Moreover, the apparatus includes a gesture classifier configured to compare the gesture description to a plurality of comparative gesture descriptions having gesture codes associated with them. The gesture classifier is configured to provide, as the result of the comparison, a gesture code of a recognized gesture.

The invention discloses a gesture recognition method based on an acceleration sensor. The gesture recognition method based on an acceleration sensor comprises the following steps: automatically collecting gesture acceleration data, preprocessing, calculating the similarity of all gesture sample data so as to obtain a similarity matrix, extracting a gesture template, constructing a gesture dictionary by utilizing the gesture template, and carrying out sparse reconstruction and gesture classification on the gesture sample data to be recognized by adopting an MSAMP (modified sparsity algorithm adaptive matching pursuit) algorithm. According to the invention, the compressed sensing technique and a traditional DTW (dynamic time warping) algorithm are combined, and the adaptability of the gesture recognition to different gesture habits is improved, and by adopting multiple preprocessing methods, the practicability of the gesture recognition method is improved. Additionally, the invention also discloses an automatic collecting algorithm of the gesture acceleration data; the additional operation of traditional gesture collection is eliminated; the user experience is improved; according to the invention, a special sensor is not required, the gesture recognition method based on the acceleration sensor can be used for terminals carried with the acceleration sensor; the hardware adaptability is favorable, and the practicability of the recognition method is enhanced. The coordinate system is uniform, and can be adaptive to different multiple gesture habits.

The disclosure describes a wearable, low-cost and low-power Electrical Impedance Tomography system for gesture recognition. The system measures cross-sectional bio-impedance using electrodes on wearers' skin. Using all-pairs measurements, the interior impedance distribution is recovered, which is then fed to a hand gesture classifier. This system also solves the problem of poor accuracy of gesture recognition often observed with other gesture recognition approaches.

The invention discloses an egocentric vision in-the-air hand-writing and in-the-air interaction method based on a cascade convolution nerve network. The method comprises steps of S1: obtaining training data; S2: designing a depth convolution nerve network used for hand detection; S3: designing a depth convolution nerve network used for gesture classification and finger tip detection; S4: cascading a first-level network and a second-level network, cutting a region of interest out of a foreground bounding rectangle output by the first-level network so as to obtain a foreground region including a hand, and then using the foreground region as the input of the second-level convolution network for finger tip detection and gesture identification; S5: judging the gesture identification, if it is a single-finger gesture, outputting the finger tip thereof and then carrying out timing sequence smoothing and interpolation between points; and S6: using continuous multi-frame finger tip sampling coordinates to carry out character identification. The invention provides an integral in-the-air hand-writing and in-the-air interaction algorithm, so accurate and robust finger tip detection and gesture classification are achieved, thereby achieving the egocentric vision in-the-air hand-writing and in-the-air interaction.

The present invention discloses a method and device of hand gesture recognition and detection on the basis of a deep neural network. The method provided by the invention comprises: acquiring an image sequence containing gestures through picture elements; and detecting gestures in the image sequence through adoption of a deep neural network model, and determining whether a predefined gesture event happens or not, the predefined gesture event consisting of appearance of one or more predefined gestures and performing gesture classification of image blocks with predefined sizes. According to the method of hand gesture recognition and detection on the basis of a deep neural network, fast and accurate recognition of a predefined gesture event may be realized.

The invention discloses a regional convolutional neural network-based method for gesture identification and interaction under egocentric vision. The method comprises the following steps of S1, obtaining training data; S2, designing a regional neural network which is used for gesture classification and fingertip detection while being used for hand detection, and ensuring that an input of the neural network is a three-channel RGB image and outputs of the neural network are top left corner coordinates and top right corner coordinates of an external connection matrix of a gesture region, gesture types and gesture skeleton key points; and S3, judging the gesture types, and outputting corresponding interactive results according to different interactive demands. The invention provides a complete method for gesture identification and interaction under egocentric vision. Through single model training and partial network sharing, the identification speed and accuracy of the gesture identification under the egocentric vision are increased and improved.

A gaming system and method for conducting a wagering game includes a primary display that displays a randomly selected outcome. The gaming system includes a multi-touch input system having a multi-touch sensing device, a memory, and a local controller. The multi-touch sensing device includes an array of input sensors that detect a multi-point gesture. Each sensor detects a touch input made by a player of the wagering game. The memory includes gesture classification codes each representing a distinct combination of characteristics relating to the gesture. The local controller receives data indicative of at least two of the characteristics related to the multi-point gesture and determines whether the data corresponds to any of the gesture classification codes. A main controller is coupled to the local controller to receive the gesture classification code responsive to the local controller determining that the data corresponds to a gesture classification code.

The invention discloses a vehicle detection method and system based on a SSD (Single Shot MultiBox Detector) and vehicle gesture classification. The method comprises the following steps that: according to an angle between a vehicle head and a horizontal axis, dividing a vehicle gesture; adding a vehicle gesture classification task into an original SSD network model; combining a vehicle detection loss with a vehicle gesture classification task loss to form a multi-task loss; replacing the softmax loss of the original SSD model with a flocal loss; carrying out joint optimization on the vehicle gesture classification task and the vehicle detection task; training to obtain a detection model; and utilizing the detection model to carry out vehicle detection on a picture to be detected to realizemultiscale and multi-angle vehicle detection. By use of the method, a deep learning target detection SSD is used for vehicle detection, the vehicle gesture classification is used for assisting the task and the vehicle detection task in carrying out joint training, and the flocal loss is added to solve the problem of unbalanced vehicle samples so as to improve the accuracy and the stability of thesystem.

The invention belongs to gesture recognition methods and relates to a 3d convolutional neural network based gesture recognition method. A series of preprocessing is carried out aiming at common videosand depth videos shot by a depth camera. On the basis of application of a common processing method for preprocessing, a convolutional neural sub-network and a deconvolution neural sub-network combined denoising method is adopted aiming at the problem of noise points of video images, and a 3d convolutional neural network is adopted for processing aimed at a temporal-spatial relationship in the videos. By the 3d convolutional neural network based gesture recognition method, the gesture classification rate is substantially increased, and recognition basis reliability and result reasonability areimproved.

The invention discloses a gesture recognition method based on a depth sensor. The method comprises the steps of sequentially obtaining depth flow information and human skeleton node data; cutting a gesture region; performing positive side and binaryzation are performed on 3D point cloud coordinates of the gesture region; gesture feature extraction, normalization and dimension reduction treatment are performed; gesture features are screened to obtain an optimal gesture feature subset; a support vector machine gesture training classifier is adopted, and a classification result is obtained; filtering is performed on the gesture classification result. The defect in the prior art is overcome, and the gesture recognition precision, stability and efficiency are improved.

The invention discloses a global-local RGB-D multimode-based gesture recognition method. An inputted gesture video is expressed mainly through data modes comprising a bone position, an RGB image, a depth image and an optical flow image; after the multimode gesture data expression is obtained, a method of a convolution neural network and a recurrent neural network is used to carrying out feature expression on gesture data in different modes, and the features obtained in different modes are used for gesture classification; and finally, different classes of gesture scores obtained in different modes are fused to obtain a multimode-based gesture classification result finally. The method can be applied to a client or a cloud for recognizing a gesture video inputted by the user, and through gesture input, a computer or mobile phone software or hardware makes a corresponding response.

The invention discloses a monocular static gesture recognition method based on multi-feature fusion. The method comprises the following steps: gesture image collection: collecting an RGB image containing gesture by a monocular camera; image preprocessing: using human skin color information for skin color segmentation, using morphological processing and combining with the geometric characteristicsof the hand, separating the hand from the complex background, and locating the palm center and removing the arm region of the hand through the distance transformation operation to obtain the gesture binary image; gesture feature extraction: calculating the ratio of perimeter to area, Hu moment and Fourier descriptor feature of gesture and forming gesture feature vector; gesture recognition: usingthe input gesture feature vector to train the BP neural network to achieve static gesture classification. The invention combines the skin color information and the geometrical characteristics of the hand, and realizes accurate gesture segmentation under monocular vision by using morphological processing and distance transformation operation. By combining various gesture features and training BP neural network, a gesture classifier with strong robustness and high accuracy is obtained.

The invention discloses a gesture identification method based on a recursive model. The method comprises the basic steps of: 1, carrying out preprocessing on static and dynamic gesture images; 2, extracting static and dynamic gesture space sequences; 3, according to the gesture space sequences, constructing a gesture recursive model; and 4, by the gesture recursive model, carrying out gesture classification. According to the gesture identification method disclosed by the invention, in a form of converting the gesture space sequences into the recursive model, problems caused by different lengths of acquired gesture space sequences and incomparability of data values of sequence points are effectively solved, and robustness of a gesture identification algorithm is improved.

The invention provides an ultrasonic gesture recognition method. The method includes the steps that ultrasonic signals and situation information related to a current situation are collected at the same time, gesture features are obtained from the collected ultrasonic signals, and the probability that the gesture features belong to various preset gestures is obtained by means of a gesture classification model trained in advance; the probability that the gestures happen in the current situation is determined on the basis of the collected situation information; according to the two probabilities, the probability that the gesture features belong to various preset gestures in the current situation is calculated, and the gesture corresponding to the largest probability is recognized as the gesture corresponding to the collected ultrasonic signals. By means of the method, gesture signals and the situation information are fused, by means of the situation information, misoperation gestures of users are filtered, wrong gestures are corrected and recognized, invalid even wrong responses are reduced, accordingly accuracy and robustness of gesture recognition are improved, and man-machine interaction experiences are improved.

The invention discloses a static gesture recognition method which combines depth information and skin color information. The method comprises the following steps: acquiring RGB image and depth image by kinect; using the depth threshold and human skin color information to get the binary image of the hand. Distance transform operation combined with palm cutting circle and threshold method is used tojudge whether there is arm region in hand image. The arm region is removed by exclusive OR operation between images to obtain binary gesture image. Calculating the number of Fourier descriptors and fingertips to form the eigenvector of the gesture; Support vector machine is used for gesture classification to achieve the purpose of gesture recognition. The invention realizes hand partial cutting by combining depth information and skin color information, and overcomes the influence of skin color region in complex background. By removing the arm region, the disturbance of the arm to the classification accuracy of the system can be overcome. The number of fingertips and Fourier descriptor features are computed and input to support vector machine for gesture recognition.

The invention provides a gesture recognition method based on multichannel electromyographic signal correlation. The gesture recognition method comprises the following steps: firstly, de-noising electromyographic signals acquired by each channel; detecting a movable section according to the signal amplitude intensity; then, performing structured processing on the active section signal; processing the signal into a format with time correlation by superposing a plurality of continuous time windows; and finally, realizing a hybrid neural network CRNet based on the CNN + RNN neural network, and establishing a classifier for gesture recognition, wherein the input of the classifier is a signal subjected to structured processing, and the output of the classifier is a gesture classification probability, and the trained classifier is utilized to perform gesture recognition. For the gesture recognition method, only a plurality of myoelectricity sensors are used for collecting original signals while extra complex equipment is not needed, so that operation is convenient, and environmental adaptability is good. According to the gesture recognition method, the noise in the signal can be effectively removed, and the used classifier reduces the computing resources and improves the recognition efficiency, and the gesture recognition method is more suitable for engineering application.

The invention discloses a gesture recognition method based on fused skin color region segmentation and a machine learning algorithm and an application thereof. The method comprises the following steps: after capturing and pre-processing a gesture image, using an Otsu adaptive threshold algorithm to segment a skin color region under an YCbCr skin color space; after segmentation, segmenting a gesture by setting a gesture region decision condition, and extracting an Hu moment character and the fingertip number as feature vectors on a gesture contour; and using an SVM classifier to classify and recognize six kinds of commonly used static gestures. According to the gesture recognition method based on the fused skin color region segmentation and the machine learning algorithm provided by the invention, the gesture can be accurately located and segmented through a skin color setting gesture decision condition; and the extracted gesture contour Hu moment character and the fingertip number provide more accurate feature vectors for gesture classification, and classification and recognition are carried out on the gesture by utilizing the mature SVM classifier, thus the gesture recognition rate is guaranteed.

The invention provides a gesture recognition method based on deep learning, and the method comprises an image collection step: collecting a video image, carrying out the video decoding of the video image, and obtaining input video data; a neural network training step: training a neural network model to perform hand position detection, gesture key point position extraction and gesture classification based on gesture key points; a gesture recognition step: carrying out hand position detection and gesture key point position extraction on the input video data by utilizing a neural network model, and carrying out gesture classification on gesture key points; an indication response step: obtaining a gesture operation instruction, and making a real-time response by the system according to the gesture operation instruction; in the neural network training step, at least three neural network models are adopted, and a data set in an online open database and/or a self-sampled and calibrated data set are/is used as input samples to train the neural network models.

The invention discloses a mechanical arm pose control method based on gesture recognition. The post of an arm can be obtained through an intelligent wrist belt, and the angle of each joint angle on aworking mechanical arm is solved based on the pose through positive inverse kinematics. The method comprises the specific steps that the wrist belt is wirelessly connected with a PC terminal through Bluetooth, and electromyographic signals collected by an intelligent wrist belt module are transmitted to a remote client; the remote client receives the signals and transmits the signals to a data processing module, the signals are filtered and denoised in the data processing module, and gestures are classified after treatment; after denoising in the data processing module, positive inverse kinematics is used for solving the joint angle; the joint angles of arms of an operator are obtained through two intelligent wrist belts; the signals of the joint angles and operation instruction signals can be transmitted to an intelligent wrist belt module through the remote client; gesture action signals are sent to a simulated mechanical arm in a simulation module; and the simulated arm sends signals to the working mechanical arm, and the mechanical arm executes commands.

The invention provides a method for predicting continuous complex motion intention of the human body based on an electromyographic signal on a surface layer. By collecting the electromyographic signalon the surface layer of the upper limb of the human body, signal processing such as noise removal is carried out, the features of the electromyographic signal on the surface layer are extracted, theelectromyographic signal on the surface layer can be utilized to accurately predict three-dimensional coordinates of the upper limbs of the human body, the obtained three-dimensional position coordinates are transmitted to a robot control system, a robot performs action and feeds back to the upper limbs of the human body to achieve man-machine collaborative operation, and the problem that the simple gesture classification of the electromyographic signal on the surface layer is not suitable for continuous complex motion of the robot.

The invention discloses a millimeter wave sensor gesture recognition method based on a convolutional neural network, and the method comprises the steps: (1) enabling a millimeter wave sensor to emit frequency modulation continuous wave signals, carrying out the various gestures in front of the sensor, and enabling a receiving channel to obtain the time domain echo signals of the gestures; (2) obtaining a micro Doppler time-frequency diagram; (3) acquiring time-frequency diagram sample sets of different gestures; (4) preprocessing the data in the training sample set, inputting the pictures as training data into the established convolutional neural network, and carrying out supervised learning to obtain parameters of each layer of the convolutional neural network; and (5) initializing the network by using the trained parameters of each layer of the convolutional neural network to obtain an image recognition network with a gesture classification function. According to the gesture recognition method and device based on the convolutional neural network, gesture classification recognition is conducted through the convolutional neural network, manual intervention is avoided, the convolutional neural network can learn deep features of all kinds of actions, the generalization ability and adaptability are high, and the gesture recognition precision and speed are improved.