Slow-motion Sequences Research Articles

Hierarchical modulation for client-driven selective streaming of multi-view video over AWGN channels

We consider a client-driven selective streaming system for multi-view video, which is supported by scalable multi-view video coding (SMVC). The system is used to reduce bit-rates for efficient transmission of multi-view video. The transmit source is partitioned into three layers: a base and two enhancement layers. The base layer contains all views encoded by MVC at a low-quality, while each enhancement layer contains high-quality part of the selected left and right views, respectively. The base layer is more important than the enhancement layers to create 3D perception, albeit of low-quality, and should be more protected than the enhancement layers. In this paper, two-level and three-level hierarchical 64QAM are used to provide unequal error protection (UEP) for the client-driven selective streaming system. First we find the suitable hierarchical values, which is the ratio of the distances in hierarchical 64QAM, for the client-driven selective streaming system. Furthermore, we analyze numerically how the hierarchical 64QAM impacts peak signal-to-noise ratio (PSNR) performance of fast and slow-motion sequences. Simulation results show that the three-level hierarchical 64QAM outperforms both conventional 64QAM with Gray mapping and the two-level hierarchical 64QAM in terms of achieving the target average PSNR performance at a low SNR environment.

Experimental insight into spalling behavior of concrete tunnel linings under fire loading

New experimental insight into the spalling behavior of concrete in fire conditions is presented in this paper. Spalling was recorded by a high-speed camera. The slow-motion sequences allow us to determine the size, shape, and velocity of the spalled-off pieces. With this information at hand, the released energy associated with every spalling event is computed and compared to the energies associated with pore-pressure and thermal-stress spalling. This comparison provides new insight into the impact of the various thermal, mechanical, and hydral processes controlling concrete spalling.

High-resolution slow-motion sequencing: how to generate a slow-motion sequence from a bit stream

Video surveillance is one of the applications where high-resolution (HR) images are crucial. The frames need to be super resolved to obtain an HR description of the scene and must be replayed at a relatively slow speed. HR slow-motion sequencing refers to the task of creating an HR slow-motion video from a given video bit stream. A better visual quality of slow video sequence can be obtained by applying the HR slow-motion sequencing algorithm to any given low-resolution (LR) video sequence. This article presents a tutorial concept demonstration type. It describes the image acquisition model utilized by the super resolution (SR) technique. The article also explains the general methodology used by the existing video compression standards to see how the existing SR techniques exploit the bit stream information to obtain the HR sequence. The authors also describe the method employed in obtaining the HR slow-motion sequences and demonstrate the results of the developed algorithm for surveillance videos.

Time perception is distorted during slow motion sequences in movies

Time perception is distorted during slow motion sequences in movies

Ballet: European by birth

Around the beginning of the twentieth century came the third great milestone in the development of ballet, when the human body was again discovered, now in terms of its expressive, rhythmic, and dynamic powers. Europe was no longer alone. European culture had spread-mainly over the Atlantic-and thanks to the innumerable feedbacks had become Euro-American. Time had acquired a new value in terms of speed, acceleration, displacement over untold distances. This could not fail to create a new mentality, a new approach to reality penetrating all walks of life. Pedestrians turned cyclists, cyclists turned drivers, engines replaced horses, liners linked continents, airplanes became means of public transport, the futurists painted speed and movement, and the motion pictures learned to master time in slow-motion sequences. The moving human body came into the focus of attention and into the center of activities: Olympic Games, physical training, bodily exercises for health or aesthetics or for sports, and movement analysis were new trends marking the advent of a new assessment of all kinds of human movements, including dancing. Ballet came to be attacked

An Investigation of the Accuracy of Ratings of a Gross Motor Skill

Abstract College male students (N = 90) enrolled in a beginning tennis class rated six specific movements involved in the performance of the eastern forehand tennis stroke. The tennis strokes rated were presented in 16 filmed slow motion sequences. The investigation was designed to determine: (a) the relative ability of a rater to identify accurately correct and incorrect movements when a gross motor skill is involved; (b) the effects of the rater's own skill in the movement evaluated upon the accuracy of his ratings; and (c) the effects of a combination of auditory and visual feedback upon the accuracy of ratings. The results indicated that the raters were more accurate in identifying movements which were performed correctly than those which were performed incorrectly, a finding termed the Differential Accuracy Phenomenon (Gordon [2]). No significant differences in the overall accuracy of ratings could be linked with either feedback or skill level of the rater.

The nervous control of the ruminant stomach. II. Movements of the partially exteriorized reticulum and rumen of a sheep.

Abstract Extract Successive sequences in the film showed: Diphasic contractions of the partially exteriorized reticulum of a sheep whilst eating. These normally recur in intervals of up to 120 sec. In the film the interval was 20 sec. The triphasic form of reticulum contractions during rumination. The first phase of the contraction is followed by the inspiratory movement which in turn is succeeded by the regurgitation of the bolus to be masticated. The otherphases of the contraction appear to correspond to normal diphasic reticulum contraction. After the mastication movements commence, the more liquid part of the bolus is swallowed. In the film, these events were emphasized by close-up and slow-motion sequences which showed in more detail the contractions of the reticulum, the inspiratory movement and cervical oesophageal movements during rumination. The two types of sequences of reticulum and rumen during fasting and feeding.