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Elder care poses an increasingly demanding issue that every aging society has to address. The notion of Ambient Assisted Living aims to solve the issue by promoting the idea of ageing at home through innovative ICT technology. The core technology relies on the real-time identification of occupant's status and prompt notification to supporting service providers before pertinent measures can be taken...
This research presents a multi-operator retargeting mechanism termed "SCAN", in which seam carving, cropping, adding seams and normalization (scaling) are applied on images in an automatic manner. The content-based cropping will first be used to remove insignificant portions on sides. Then a new seam carving algorithm based on both the global saliency and local saliency is proposed to rid...
This paper proposes an embedded implementation architecture of 2-D Non-separable Oversampled Lapped Transform (NSOLT). NSOLT yields a frame for image representation which satisfies the symmetry and overlapping property. Since the redundancy can be set to an arbitrary rational value, high performance image processing can be realized while saving memory consumption. This work mainly concerns the implementation...
The written-in errors in bit patterned media (BPM) recording systems cause the erroneous bits during the writing process, leading to performance degradation. In previous works, the BPM read/write channel is modeled as a binary symmetric channel (BSC) with an additive white Gaussian noise (AWGN) channel or the cascaded BSC-AWGN channels. The initial channel information including the written-in errors...
This paper presents a single-camera HDR imaging algorithm, which is able to solve all the extreme conditions by controlling the exposure time to get a well-exposed image and then enhancing it. The proposed system is divided into two parts, i.e. single-image HDR imaging technique and an exposure control method. The single-image HDR imaging technique integrates two methods, i.e. Dynamic Local Contrast...
We propose a novel contrast enhancement method for dark images using the value gap expansion force (VGEF) and the sorted histogram equalization. Based on the observation that the inter-pixel relationship is analogous to the electrostatic force, we define the pixel field spread around each pixel and the pixel mass at each pixel position. We compute the VGEF exerted to a pixel by multiplying the pixel...
In this paper, we analyse the emotion of children's stories in sentence level by considering the context information. We demonstrate that the emotion of a sentence is not only dependent on its content, but also affected by its neighbours in a story. A Hidden Markov Model (HMM) based method is proposed to model the emotion sequence and to detect whether a sentence is neutral or not. We show the important...
The conventional broadband active noise control (ANC) system may not be able to function well when the target noise contains both wideband and narrowband components simultaneously. Feed-forward hybrid active control has attracted quite a lot attention recently, as it can effectively suppress both components at the same time. Such hybrid ANC system consists of three tightly integrated subsystems, namely,...
It is still not fully revealed how people convey and understand whispered speech without critical deterioration of intelligibility. Typical questions are how the height of sound is produced and how voiced consonants are produced without vibration of vocal folds. In this paper, we have investigated the deterioration of intelligibility of whispered speech and tried to reveal the mechanism to convey...
A brief summary of using conductance catheterization techniques to estimate cardiac function is presented in this paper. This paper is to present how to measure conductance blood volume in continuous real time. Results show how possible to use the techniques to diagnose cardiovascular disease.
Face images are commonly used in various tasks such as face detection, facial feature extraction, and face recognition. In the security applications, the images are used as input of the identification or verification systems due to its usability, availability, and reliability. Since the capacity of memory of face database system is limited, all images retained in the database should be of small size...
Bone conduction has been used for speech enhancement in very noisy environments. It usually includes nonlinearity in transmission, small non-stationary noise due to body movements (friction, collision, wind noise, crosstalk and so on), serious attenuation of high frequency components, etc. These problems usually lead to poor intelligibility of bone-conducted (BC) speech. Recoverying an air-conducted...
In this paper, we propose a process of 3D object reconstruction using a pair of Kinect cameras. After we refine raw depth images from two Kinect cameras using a joint bilateral filter, we find intrinsic and extrinsic parameters by camera calibration. Then, we apply 3D warping to obtain a point cloud model in the 3D space and acquire a smooth surface model of the 3D object. In order to accelerate a...
In High Efficiency Video Coding (HEVC), the coding efficiency of infra-frames is lower than inter-frames, which will cause the flicker artifact and perceptual fluctuation among CTUs in low bitrates applications. Therefore, this paper proposes a region-based infra-frame rate-control scheme to improve the objective quality and to reduce PSNR fluctuation among CTUs. Firstly, the CTUs in infra-frame are...
This paper describes new algorithms promoting sparsity in modified filtered-x algorithms for active noise control. The proposed algorithms are based on recent techniques incorporating approximations to the to-norm in the cost function used. An approximation to the affine projection algorithm leads to new zero-attracting and reweighted zero-attracting modified filtered-x pseudo affine projection algorithms...
This paper introduces a novel vision-based approach for realistic interaction between user and display's content. An extremely accurate motion capture system is proposed to measure and track the user's head motion in 3D space. Video frames captured by the low-cost head-mounted camera are processed to retrieve the 3D motion parameters. The retrieved information facilitates the real-time 3D interaction...
Although refractory epileptic patients suffer from uncontrolled seizures, their quality of life (QoL) may be improved if the seizure can be predicted in advance. On the hypothesis that the excessive neuronal activity of epilepsy affects the autonomie nervous system and the fluctuation of the R-R interval (RRI) of an electrocardiogram (ECG), called heart rate variability (HRV), reflects the autonomie...
After the East Japan Great Earthquake happened on Mar. 11, 2011, many affected people who lost houses, jobs and families fell into difficulties. Governmental agencies and NPOs supported them by offering relief supplies, foods, evacuation centers and temporary houses. When various supports were offered to affected people, if Governmental agencies and NPOs could detect their needs appropriately, it...
Anchorperson segment detection enables efficient video content indexing for information retrieval. Anchorperson detection based on audio analysis has gained popularity due to lower computational complexity and satisfactory performance. This paper presents a robust framework using a hybrid I-vector and deep neural network (DNN) system to perform anchorperson detection based on audio streams of video...
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