摘要:
Linear method for performing head motion estimation from facial feature data, the method comprising the steps of: obtaining first facial image and detecting a head in the first image; detecting position of four points P of said first facial image where P={p1, p2, p3, p4}, and pk=(xk, yk); obtaining second facial image and detecting a head in the second image; detecting position of four points P′ of the second facial image where P′={p′1, p′2, p′3, p′4} and p′k=(x′k, y′k); and, determining the motion of the head represented by a rotation matrix R and translation vector T using the points P and P′.The head motion estimation is governed according to an equation: P′i=RPi+T, where R = [ r 1 T r 2 T r 3 T ] = [ r ij ] 3 × 3 and T=[T1 T2 T3]T represents camera rotation and translation respectively.
摘要:
A method for classifying objects in a scene, is provided. The method including: capturing video data of the scene; locating at least one object in a sequence of video frames of the video data; inputting the at least one located object in the sequence of video frames into a time-delay neural network; and classifying the at least one object based on the results of the time-delay neural network.
摘要:
A method and system for providing a mood based virtual photo album which provides photos based upon a sensed mood the viewer. The method may include the steps of capturing a first image of a facial expression of a viewer by a camera, providing the image to a pattern recognition module of a processor, determine a mood of the viewer by comparing the facial expression with a plurality of previously stored images of facial expressions having an associated emotional identifier that indicates a mood of each of the plurality of previously stored images, retrieving a set of photos from storage for transmission to the viewer based on the emotional identifier associated with the determined mood, and transmitting the set of photos in the form of an electronic photo album. A system includes a camera, a user interface for transmitting a first image of a facial expression of a viewer captured by the camera, a processor for receiving the transmitted image by the user interface, and including a pattern recognition module for comparing the image received by the processor with a plurality of images of facial expressions from a storage area to determine a mood of the viewer. A retrieval unit retrieves a set of electronic photos corresponding to the mood of the viewer, and transmits the set of electronic photos for display as a virtual photo album.
摘要:
A method and apparatus are disclosed for monitoring a location using vision-based technologies and to automatically trigger the activation of a child safety feature or an alarm when a child is detected. One or more image capture devices are focused on a given location. The captured images are processed to identify the presence of a child and to initiate an appropriate response, such as sending assistance, activating a child safety feature or triggering an alarm. A number of rules can be utilized to define various child safety events. Each rule contains one or more conditions that must be satisfied in order for the rule to be triggered, and, optionally, a corresponding action-item that should be performed when the rule is satisfied, such as sending assistance, activating a child safety feature or triggering an alarm.
摘要:
Cameras and image processing techniques are applied to the control of HVAC systems. Occupancy is detected using head-counting or motion detection. Activities are recognized in images and image sequences by machine-recognition techniques. The nature of activities, the intensity of activities, the number of occupants and their activities, etc. are all inferred from images and image sequences and used to predict current loads and/or required control signals for regulating an HVAC system.
摘要:
A system for monitoring a driver's attention to driving a vehicle includes a camera having a field of view wherein a driver's face is positioned in the field of view of the camera. The system also includes a gaze and facial pose determiner coupled to the camera which receives signals corresponding to images of the driver's face for analysis. The gaze and facial pose determiner determines whether the gaze and facial pose of the driver are oriented in a forward direction of travel of the vehicle. The system also includes an alarm responsive to the gaze and facial pose determiner for advising the driver that his gaze and facial pose are not oriented in the forward direction of travel of the vehicle.
摘要:
A system and method is provided for adaptively setting biometric measurement thresholds in a biometric measurement system. A biometric measurement system comprises a biometric sensor, an analysis unit, and an output unit. The invention comprises an environmental sensor that measures a value of an environmental parameter of the ambient environment of the biometric measurement system. The invention also comprises an adaptive threshold setting unit that adaptively sets an adjustable biometric measurement threshold in the analysis unit using a value of the environmental parameter measured by the environmental sensor. The analysis unit analyzes biometric measurements received from the biometric sensor and uses the adjusted biometric measurement threshold to take into account the influence of environmental changes.
摘要:
An acoustic based pointing device and a system and method for using the pointing device to move a cursor on a display screen of a display device. The pointing device comprises an acoustic source that generates and propagates an acoustic signal that is detected by four microphones M1, M2, M3, and M4 and is then converted into corresponding periodic electrical signals S1, S2, S3, and S4. The position vector P0 of the acoustic source is calculated by solving triangulation equations that depend on phase-shift time delays between S1 and Sj for j=1, 2, and 3. A position vector PC is calculated from P0 using a scale vector that relates a change in position of the cursor to a change in position of the acoustic source. Then the cursor is moved to a position PC associated with the position vector PC.
摘要翻译:一种基于声学的指示设备,以及使用指示设备在显示设备的显示屏幕上移动光标的系统和方法。 指向装置包括产生和传播由四个麦克风M 1,M 2,M 3 3检测到的声信号的声源, 和M 4,然后转换成对应的周期性电信号S 1,S 2,S 3,和 S SUB> 4。 声源的位置矢量 P 0 SUB>通过求解三角测量方程来计算,该方程式取决于S 1和S 2之间的相移时间延迟 j = 1,2和3.的位置向量 P SUB>从 P 使用将光标的位置的改变与声源的位置的改变相关联的比例向量来<! - SIPO P SUB相关联的位置P SUB>。
摘要:
An authenticating card 10 for use in a transaction includes a memory 15 and a processor 20. Biometric data of an authorized user of the card 10 are stored in the memory 15 when the card is used for the first time. The processor 20 receives acquired biometric information 25 of the user and allows the transaction when there is a match between the acquired biometric information 25 and the stored biometric data. The biometric information 25 of the user desiring to perform the transaction may be acquired by an input device or reader 30, such as a scanner, recorder or a digital tablet. The biometric information 25 and data may be the user's signature, voice print, palm print, finger print, length of finger(s), or eye scan.
摘要:
Objects are classified using a normalized cross correlation (NCC) measure to compare two images acquired under non-uniform illumination conditions. An input pattern is classified to assign a tentative classification label and value. The input pattern is assigned to an output node in the radial basis function network having the largest classification value. If the input pattern and an image associated with the node, referred to as a node image, both have uniform illumination, then the node image is accepted and the probability is set above a user specified threshold. If the test image or the node image are not uniform, then the node image is not accepted and the classification value is kept as the value assigned by the classifier. If both the test image and the node image are not uniform, then an NCC measure is used and the classification value is set as the NCC value.