In block motion estimation, search patterns with different shapes or sizes and the center-biased characteristics of motion-vector distribution have a large impact on searching speed quality performance. We propose novel algorithm using cross-search pattern as initial step large/small diamond (DS) subsequent steps for fast estimation. The is designed to fit cross-center-biased vector real-world sequences by evaluating nine relatively higher probable candidates located horizontally vertically...

We propose two cross-diamond-hexagonal search (CDHS) algorithms, which differ from each other by their sizes of hexagonal patterns. These algorithms basically employ cross-shaped patterns consecutively in the very beginning steps and switch using diamond-shaped To further reduce checking points, pairs are proposed conjunction with candidates found located at diamond corners. Experimental results show that CDHSs perform faster than (DS) about 144% cross-diamond (CDS) 73%, whereas similar...

With the widespread applications of electronic learning (e-Learning) technologies to education at all levels, increasing number online educational resources and messages are generated from corresponding e-Learning environments. Nevertheless, it is quite difficult, if not totally impossible, for instructors read through analyze predict progress their students on fly. The main contribution this paper illustration a novel concept map generation mechanism which underpinned by fuzzy domain...

In this paper, we propose an efficient general-purpose no-reference (NR) video quality assessment (VQA) framework that is based on 3D shearlet transform and convolutional neural network (CNN). Taking blocks as input, simple primary spatiotemporal features are extracted by transform, which capable of capturing natural scene statistics properties. Then, CNN logistic regression concatenated to exaggerate the discriminative parts predict a perceptual score. The resulting algorithm, name...

Purpose The purpose of this paper is to investigate the impact different ways message framing on users’ engagement behavior regarding brand posts Facebook and determine whether thumbs-up reply moderate impact. Design/methodology/approach A panel data analysis was conducted a with 11,894 observations 850 unique from pages world’s most valuable brands over seven days window two each day. system equations estimated using ordinary least squares, Hausman–Taylor IV seemingly unrelated regressions...

The quality control for video coding usually absents from many traditional fast block motion estimators. A novel block-matching algorithm estimation named the adjustable partial distortion search (APDS) is proposed. It a new normalized comparison method capable of adjusting prediction accuracy against searching speed by factor k. With adjustability, APDS could act as (NPDS) when k equal to 0, and conventional (PDS) 1. In addition, it uses halfway-stop technique with progressive distortions...

Remote imaging photoplethysmography (RIPPG) can achieve contactless human vital signs monitoring. Though the remote operation mode brings a great convenience for RIPPG applications, signal quality is limited by nature. Improving becomes an essential task in clinical application of RIPPG. Since region interest (ROI) transforms from point to area, there new approach improving through refining ROI. In this paper, we propose dynamic ROI RIPPG, which automatically select skin regions...

In order to fit the small cross-center-biased characteristic of real world video sequences, an improved version well-known cross-diamond search algorithm (CDS) is proposed in this paper. Unlike traditional pattern, such as square, diamond or cross - all are vertically and horizontally symmetric shape, kite-cross-diamond (KCDS) adopts asymmetric kite-shaped patterns step keep similar distortion even better low-motion sequence while speed motion estimation for stationary quasi-stationary...

In order to fit the small cross-center-biased characteristic of real world video sequences, an improved version well-known cross diamond search algorithm is proposed in this paper. The new uses a cross-shaped patterns first two steps speedup motion estimation stationary and quasi-stationary blocks. Experimental results show that cross-diamond could achieve much higher computational reduction as compared with Diamond Search (DS) Cross (CDS) while similar prediction accuracy maintained, it...

Search patterns and the center-biased characteristics of motion vector distribution (MVD) have a large impact on both searching speed quality block estimation. We propose novel algorithm using two cross-shaped search as first initial steps large/small diamond-shaped subsequent for fast estimation (BME). The small pattern is to fit cross-center-biased MVD real-world sequences by evaluating 5 relatively higher probable candidates located at search-grid center. proposed small-cross-diamond...

The new upcoming video coding standard, H.264, allows motion estimation performing on multiple reference frames. This feature improves the prediction accuracy of inter-coding blocks significantly, but it is extremely computational intensive. Its software adopts a full search scheme. complexity multi-frame increases linearly with number used However, distortion gain given by each frame varies content sequence, and not efficient to through all candidate In this paper, novel center-biased...

Quality of synthesized view by Depth-Image-Based Rendering (DIBR) highly depends on hole filling, especially for with large disocclusion. Many filling methods are proposed to improve the quality and inpainting is most popular approach recover disocclusions. However, conventional either makes regions blurred via diffusion or propagates foreground information disoclusion regions. Annoying artifacts created in virtual views. This paper proposes a depth-aided exemplar-based method recovering...

Photoplethysmography (PPG) has been widely used in clinical applications for monitoring vital signs especially heart rate by pulse oximeter. Recent researches have demonstrated the possibility of using fingertip video based PPG approach to estimate smartphones. However, due variation camera sensor characteristics difference smartphones, conventional fixed region-of-interest (ROI) signal extraction technique is not reliable. In this paper, a novel frame adaptive ROI method proposed detour...

Conventional histogram-based image retrieval algorithms usually find only intersecting areas of the color-component distributions images, and thus work well in matching images with exact colors instead similar colors, especially for computer generated pictures. This could be greatly affected by overall variations, such as intensity changes. A novel merged-color histogram (MCH) method color is proposed to facilitate between means quantization palette merging. Color compacts information...

The magnitude distribution law of DWT coefficients color image data in Karhunen-Loeve space is investigated. Considering the KLT matrix formed, components K/sub 1/, 2/ and 3/, general, have relation 1/>K/sub 2/>K/sub 3/ where 2/, are three a KL space. Based on this characteristic other coefficient features, novel ordered-SPIHT for embedded coding (OCSPIHT) proposed paper. set an split into several sets according to their magnitudes. For each specific threshold, only with equal or larger than...

The launch of Kinect provides a convenient way to access the depth information in real time. However map quality still needs be enhanced for 3D visual applications. In this paper, an adaptive background biased hole-filling method is proposed. First, holes caused by abnormal reflection are filled color similarity in-painting, and soft decision checking performed use probabilities random walks segmentation. Afterwards it assumed that lost rest belongs background. extracted automatic...

With the popularity of touchscreen devices, physical button-based keyboards are being replaced by finger-operated virtual keyboards. Entering text on these devices is no longer limited finger tapping activities keys. Text input can be performed sliding over keyboard, which well realized Swype technology a typical QWERTY keyboard. Such shorthand gesturing for input, however, may inefficient when directly applied to Chinese especially in stroke-based method. In this paper, novel dynamic...

Integer Haar wavelet transform or S-transform is used as the basic building block for many exiting integer transform. As an alternative, a new multiwavelet and its associated prefilter are designed based on box-and-slope multi-scaling system. Both can be implemented with simple requiring only addition bit shift operations. Since approximation to nontruncated higher vanishing moment than that of transform, better accuracy expected verified experimentally. The successfully applied lossless...