Video Bit Reduction Based for Foveation

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  • video bit reduction based on foveation 12686 santhosa.nl

    55 Video Bit Reduction Based on Foveation 56 Soft Computing Techniques for Scene Cut Detection from MPEG Compressed Video 57. Form Approved REPORT DOCUMENTATION PAGE. variable resolution static images and video, both in 8-bit gray scale and 24,Reduction or elimination of the apparent motion,Based upon the foveation .Real-time foveation techniques for low bit rate video,Its implementation in software and in embedded systems can be efficient by embedding foveation inside the video coding loop. In case of the DCT domain foveation algorithm, we obtain reduction in complexity as well as bit rate. Foveation preserves the semantics of the bit stream and requires no modification of the decoder.

  • 438 IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL

    improve video quality in low bit rate transmissions [12]–[15]. However, it is unclear whether or not there is a way to quantify pling rate reduction based on foveation with no perceptual loss (we also compute this perceptual efficiency for a number of re-cent displaysto show the potential gain by such resampling). AAdaptive Foveation of MPEG Video Kent State University,Adaptive Foveation of MPEG Video T H Reeves Department of Systems Design Engineering University of Waterloo be either network-based as shown, or colocated with the video source, but the essential elements of the model are The use of bit rate reduction methods (a) and (b), inde-

  • US Patent Application for Foveation-based error resilience

    In a preferred embodiment of the present invention, a real time processing module partitions a video image into at least two data bit stream signals based on a directional pointing device or a pattern filter definition of “areas of importance.” These different data bit stream signals are then processed via different algorithms based on theA practical foveation-based rate-shaping mechanism for,Request PDF on ResearchGate A practical foveation-based rate-shaping mechanism for MPEG videos Foveation is one of the nonuniform resolution properties of

  • Real-Time Foveation Techniques for Low Bit Rate Video Coding

    Real-Time Foveation Techniques for Low Bit Rate Video Coding Hamid R. Sheikh, Brian L. Evans and Alan C. Bovik Abstract Lossy video compression methods often rely on modeling the abilities and limitations of the intended receiver, the Human Visual System (HVS), to achieve the highest possibleUS Patent for Foveation-based error resilience algorithm,In a preferred embodiment of the present invention, a real time processing module partitions a video image into at least two data bit stream signals based on a directional pointing device or a pattern filter definition of “areas of importance.”

  • Foveated video compression with optimal rate control

    Foveated Video Compression with Optimal Rate Control Sanghoon Lee, Marios S. Pattichis, and Alan Conrad Bovik, Fellow, IEEE Abstract— Recently, foveated video compression algorithms have been proposed which, in certain applications, deliver high-quality video at reduced bit rates by seeking to match the nonuniform sampling of the human retina.Implementation of a foveated image coding system for image,Implementation of a foveated image coding system for image bandwidth reduction. A visual attention-based bit allocation strategy for video compression is proposed. Saliency-based attention

  • US Patent for Foveation-based error resilience algorithm

    In a preferred embodiment of the present invention, a real time processing module partitions a video image into at least two data bit stream signals based on a directional pointing device or a pattern filter definition of “areas of importance.”Dynamic Gaze Span W indow based Foveation for Perceptual,loop delay associated with streaming in the network. We have designed a live eye gaze interaction based dynamic foveation windowing scheme to address the challenge. 1 Introduction The human vision offers a tremendous scope of perceptual data reduction. Only about 2 degree in our about 140 degrees vision span has sharp vision. There

  • US7783120B2 Multi-resolution foveation for bandwidth

    A scene of an image sequence is compressed using a number of foveation zones, each foveation zone being weighted based on a probability of a viewer looking at a corresponding portion of the first scene. Another scene of the image sequence is compressed using a different number of foveation zones, each foveation zone being weighted based on a probability of a viewer looking at a correspondingSpatialchromatic Foveation for Gaze Contingent Displays,spatialchromatic foveation in GCDs need to satisfy the condition in which the contrast modulation introduced by bit-depth reduction is not perceivable by a human observer while the bit depth around the gaze direction should remain unchanged. (a) (b) Figure 1 Schematics of the spatialchromatic foveation

  • (PDF) Multilayer Bit Allocation for Video Encoding

    The Spatial and Temporal model is improved by taking into account the foveation properties of the HVS. The visibility given by the foveation model video code bit allocation technique based on visual distortion sensitivity. The subjective test shows the performance of the proposed scheme.Perceptually-lossless image coding based on foveated-JND,Perceptually-lossless image coding based on foveated-JND and H.265/HEVC Based on the foveation model describing the contrast masking effect and adopted JND model, we develop the foveated contrast masking effect model as: From the Table 3 and Fig. 9, we can see though it has much bit rate reduction, the perceptual area has no visual

  • Laboratory for Image and Video Engineering The

    In this paper, foveation, a property of the HVS, is exploited in video transcoding. The proposed foveation embedded DCT domain video transcoding can reduce the bit rate without compromising visual quality or achieve better subjective quality for a given bit rate by shaping the compression distortion according to the foveated contrastUS7499594B2 Multi-resolution predictive foveation for,A scene of an image sequence is compressed using a number of foveation zones, each foveation zone being weighted based on a probability of a viewer looking at a corresponding portion of the first scene. Each foveation zone in the scene has a corresponding resolution to ensure that at least one object therein is viewer-recognizable.

  • IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO

    bit-rate continuum demand; on the contrary, if many layers are generated, the coding efficiency of the bitstream appears to be a serious issue [7]. An alternative approach other than scalable coding is to encode the video with higher bit rate and provide some rate reduction mechanism for dynamically adapting the videoA game attention model for efficient bit rate allocation,To meet the stringent network bandwidth requirements of cloud gaming and support more players, efficient bit rate reduction techniques are needed. In this paper, we introduce the concept of game attention model (GAM), which is basically a game context-based visual attention model, as a means for reducing the bit rate of the streaming video more

  • Day 2 Immerse Pillar TimLeland qualcomm

    8-Bit 2.07 Megapixels 16.78 Million Colors 8-Bit 8.29 Megapixels Tile-based Foveation with Eye-Tracking Multiview Rendering Fine Grain Preemption highlights Room-Scale 6DOF with SLAM Adreno Foveation 2K x 2K @ 120 fps XR 30% Faster Graphics and Video 30% Power Reduction Improved 6DOF Hand Tracking and Controller support IrisPredictive Perceptual Compression for Real Time Video,speed information is used to construct a saccade window. Based on this approach, we have implemented a real-time foveation-aware perceptual video streaming transcoder with a fixed target bit-rate. Our transcoder system intakes live perceptual information related

  • Off-line Foveated Video: Effects on Compression and Perception

    • How to control video fidelity based on recorded eye-data from several viewer? six tested videos, an average bit-rate reduction of 20 %. UCSB, 2007-03-12 Marcus Nyström, Lund University Six videos compressed at high bit rates, before and after off-line foveation (hence 12 videos in total). • Videos shown in random order togetherA Hybrid Scheme for Perceptual Object Window Design ,A Hybrid Scheme for Perceptual Object Window Design with Joint have proposed perceptually pre-encoding video based on the viewing patterns from a group of people. Babcock et. al. [27] investigated various eye movement patterns and foveation placements during different which determines the potential for further video bit-rate reduction

  • A game attention model for efficient bit rate allocation

    To meet the stringent network bandwidth requirements of cloud gaming and support more players, efficient bit rate reduction techniques are needed. In this paper, we introduce the concept of game attention model (GAM), which is basically a game context-based visual attention model, as a means for reducing the bit rate of the streaming video moreDay 2 Immerse Pillar TimLeland qualcomm,8-Bit 2.07 Megapixels 16.78 Million Colors 8-Bit 8.29 Megapixels Tile-based Foveation with Eye-Tracking Multiview Rendering Fine Grain Preemption highlights Room-Scale 6DOF with SLAM Adreno Foveation 2K x 2K @ 120 fps XR 30% Faster Graphics and Video 30% Power Reduction Improved 6DOF Hand Tracking and Controller support Iris

  • Predictive Perceptual Compression for Real Time Video

    speed information is used to construct a saccade window. Based on this approach, we have implemented a real-time foveation-aware perceptual video streaming transcoder with a fixed target bit-rate. Our transcoder system intakes live perceptual information related Off-line Foveated Video: Effects on Compression and Perception,• How to control video fidelity based on recorded eye-data from several viewer? six tested videos, an average bit-rate reduction of 20 %. UCSB, 2007-03-12 Marcus Nyström, Lund University Six videos compressed at high bit rates, before and after off-line foveation (hence 12 videos in total). • Videos shown in random order together

  • A Hybrid Scheme for Perceptual Object Window Design

    A Hybrid Scheme for Perceptual Object Window Design with Joint have proposed perceptually pre-encoding video based on the viewing patterns from a group of people. Babcock et. al. [27] investigated various eye movement patterns and foveation placements during different which determines the potential for further video bit-rate reductionBovik, “Real-time foveation techniques for h.263 video,Then, we demonstrate that foveation, as described by this model, can be incorporated into standard motion compensation and Discrete Cosine Transform (DCT) based video coding techniques for low bit rate video coding, such as the H.263 or MPEG-4 video coding standards, without incurring prohibitive complexity overhead.

  • (PDF) Adaptive wavelet eye-gaze based video compression

    Adaptive Wavelet Eye-Gaze Based Video Compression Mohsen Farid1, Fatih Kurugollu, Fionn Murtagh School of Computer Science, Queen’s University, Belfast, UK ABSTRACT We present a novel approach to compression of video frames based on the foveation behavior of the human visual system (HSV).COMPARATIVE STUDY OF MPEG-4 AND H.264 VIDEO ,foveation based video coding yields higher required to reduce transmission bit-rate for video data content without degrading the visual quality significantly. In a (local bandwidth reduction) [4], saliency detection based foveating [6] and wavelet based foveated compression [3].

  • Predictive Perceptual Compression for Real Time Video

    Based on this approach, we have implemented a real-time foveation aware perceptual video streaming transcoder with a fixed target bit-rate. Our transcoder system intakes live perceptual information related to the subject’s eye position. Head movement is monitored via an video bit reduction based on foveation deliciouscatering.eu,Perceptually Optimised Video Coding based on Eye-tracking,% Reduction in Bit Rate,Foveation and texture based priority. Patent US6252989 Foveated image coding system and,PCI Bus interface 100 also implements a 32 bit bidirectional data,Multi-resolution foveation for bandwidth reduction of moving,Web page based video .

  • CiteSeerX — Citation Query A Fast DCT-SQ Scheme for Images

    Then, we demonstrate that foveation, as described by this model, can be incorporated into standard motion compensation and Discrete Cosine Transform (DCT) based video coding techniques for low bit rate video coding, such as the H.263 or MPEG-4 video coding standards, without incurring prohibitive complexity overhead.Low Complexity Video Compression Using Moving Edge,DCT based foveation fllter is used to reduce complexity for detecting foveation edges via a reduction function block (RFME). spond to only moving edge blocks the slight degradation of video quality is ofiset by the bit savings obtained. Therefore,

  • 引入Foveation视觉模型的MPEG视频码流 oalib

    Bit-rate Transcoding of MPEG Video Streams with Foveation Visual Model 引入Foveation视觉模型的MPEG视频码流码率转换: mpeg-2变长码域实时视频水印: Real-time MPEG-2 Video Watermarking in the VLC Domain MPEG-2变长码域实时视频水印: A New MPEG Video Stream Cut Detect Algorithm Based on Motion VectorAttention Driven Foveated Video Quality Assessment,Existing studies on foveation based video quality assessment only take into account static foveation mechanism. This paper first proposes an advanced foveal imaging model to generate the perceived representation of video by integrating visual attention into the foveation mechanism.

  • Perceptual Multimedia Compression Based on Predictive

    Perceptual Multimedia Compression Based on Predictive Kalman Filter Eye Movement Modeling The concept of the PAtF allows significant reduction of the bandwidth of a video stream and computational burden reduction in the case of 3D media creation and transmission. This idea is used in perceptual adaptation schemes to achieve anCiteSeerX — Citation Query A Fast DCT-SQ Scheme for Images,Then, we demonstrate that foveation, as described by this model, can be incorporated into standard motion compensation and Discrete Cosine Transform (DCT) based video coding techniques for low bit rate video coding, such as the H.263 or MPEG-4 video coding standards, without incurring prohibitive complexity overhead.

  • Low Complexity Video Compression Using Moving Edge

    DCT based foveation fllter is used to reduce complexity for detecting foveation edges via a reduction function block (RFME). spond to only moving edge blocks the slight degradation of video quality is ofiset by the bit savings obtained. Therefore, 引入Foveation视觉模型的MPEG视频码流 oalib,Bit-rate Transcoding of MPEG Video Streams with Foveation Visual Model 引入Foveation视觉模型的MPEG视频码流码率转换: mpeg-2变长码域实时视频水印: Real-time MPEG-2 Video Watermarking in the VLC Domain MPEG-2变长码域实时视频水印: A New MPEG Video Stream Cut Detect Algorithm Based on Motion Vector

  • Attention Driven Foveated Video Quality Assessment

    Existing studies on foveation based video quality assessment only take into account static foveation mechanism. This paper first proposes an advanced foveal imaging model to generate the perceived representation of video by integrating visual attention into the foveation mechanism.Qualcomm S napdragon 845 Mobile Platform,Capturing cinema grade videos Built with new camera and graphics architectures that are designed to allow mobile users to capture their videos in cinema-grade quality and have access to a billion shades of colors. Snapdragon 845 mobile platform is the first to feature 64x more color information via Ultra HD premium video capture.

  • BIT RATE REDUCTION FOR H.264/AVC VIDEO BASED ON

    with UM hexagonal, based on the comparison result author concluded that designed model gives better performance and applicable for the real time video coding applications. Anthon et al. [7] has proposed new algorithm used in reduction of the bit planes in Distributed Video Coding (DVC).VideoSet: A large-scale compressed video quality dataset,large-scale JND-based video quality dataset, an alliance of aca- rate-distortion optimization and, then, an optimum bit allocation and a perceptual based rate control scheme was developed to achieve considerable bitrate reduction in [7]. An SSIM-inspired Foveation theory becomes popular in

  • mindfulness based stress reduction meditation YouTube

    Jan 21, 2019· Autoplay When autoplay is enabled, a suggested video will automatically play next. Up next Concentration Productivity Music, ☯ Focus Music, Study, concentration.Google AI Blog: Introducing a New Foveation Pipeline for,Dec 05, 2017· This method gives a major benefit to reducing the severity of visual artifacts during foveated rendering. Although phase-aligned rendering is more expensive to compute than traditional foveation under the same level of acuity reduction, we can still yield a net savings by pushing foveation to more aggressive levels that would otherwise have yielded too many artifacts.

  • Infantile nystagmus syndrome: Broadening the high

    We investigated the effects of contact lenses in broadening and improving the high-foveation-quality field in a subject with infantile nystagmus syndrome (INS). A high-speed, digitized video system was used for the eye-movement recording. The subject was asked to fixate a far target at differentSpace-variant picture coding CORE,PhDSpace-variant picture coding techniques exploit the strong spatial non-uniformity of\ud the human visual system in order to increase coding efficiency in terms of perceived quality\ud per bit. This thesis extends space-variant coding research in two directions. The first of\ud these directions is

  • Assessing Visual Quality of Omnidirectional Videos

    of omnidirectional video streaming [8], which mainly focuses on the impact of stalling on omnidirectional streaming. Singla et al. proposed a modified absolute category rating (M-ACR) method, analyzing subjective quality and simulator sickness of omnidirectional videos at varying resolutions and bit-rates across different devices [9], [10].The Report Committee for Alan Aaron Bernstein Certi es,Persistics is an advanced framework for processing wide-area aerial surveillance video. This framework handles the tasks of data collection, stitching of multi-sensor imagery, foveation pro le is carefully designed to match that of the typical HVS characteristics, based reduction of the artifacts is an important preprocessing step. The