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...
To get the highest possible resolution while remaining responsive to network changes, Matia employs panoramic stereo video and likelihood-based foveation Specifically, Matia renders a wide field-of-view (FOV) panoramic stereo video In turn, any possible stereo view (eg, due to unexpected head movement or network fluctuations) can be generated...
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-...
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...
has exploited foveation, which is non-uniform resolution repre-sentation of an image reflecting the sampling in the retina, for very low bit-rate video coding In this paper, we develop a fast approximation of the foveation model and demonstrate two real-time foveation techniques: spatial domain foveation ,...
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 corresponding ....
Very low bit rate foveated video coding for H263 , can improve the coding performance up to a 10-20% reduction of the bit rate with almost the same subjective video quality , a foveation ....
Adaptive Foveation of MPEG Video Adaptive Foveation of MPEG Video T H Reeves Department of Systems Design Engineering University of Waterloo Ontario, Chada, N2L 3G1 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...
In addition, a foveation-based bit- same information content as a foveated image can be stream partitioning is developed, where each frame is obtained by applying a foveation filter, which consists spatially divided into foveated and background layers...
8-Bit 207 Megapixels 1678 Million Colors 8-Bit 829 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 ....
Introducing a New Foveation Pipeline for Virtual/Mixed Reality , based on a nonlinear mapping of the screen distance from the visual fixation point This method gives two main benefits First, by more closely matching the visual fidelity fall-off of the human eye, we can reduce the total number of pixels computed compared to other foveation ....
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...
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 ,...
Laboratory for Image & Video Engineering , based digital video coding standards such as MPEG and H26x are becoming more widely adopted for multimedia applications Since the standards differ in their format and syntax, video transcoding, where a compressed video bit-stream is converted from one format to another format, is of interest for ....
In transcoding, simply reusing the motion vectors extracted from an incoming video bit stream may not result in the best quality In this paper, we show that the incoming motion vectors become nonoptimal due to the reconstruction errors To achieve the best video quality possible, a new motion estimation should be performed in the transcoder...
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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...
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 ....
Real-time foveation techniques for low bit rate video coding , 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 H263 or MPEG-4 video coding standards, without incurring prohibitive complexity overhead , In case of the DCT ....
on the output bitrate of the streamed video is investigated Measurements are performed using games from various genres and with different player points of view to explore changes in video bitrate with different parameters of foveation Latencies involved in foveated video streaming for cloud gam-...
Apr 27, 2014· 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 ....
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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...
Wang, L Lu, and A C Bovik, "Foveation scalable video coding with automatic fixation selection," IEEE Transactions on Image , , "A novel approach for reduction of blocking effects in low bit rate image compression," IEEE Transactions on , "Quality-aware video based on robust embedding of intra- and inter-frame reduced ....
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 contrast sensitivity function of the HVS...
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...
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...
Joint perceptually-based Intra prediction and quantization for HEVC Guoxin Jinz, , image or video at considerably low bit rates with good quality , Temporal masking in video coding refers to the reduction in the perception of distortion (or signal) in the presence of ....
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 corresponding ....
Video Bit Reduction Based on Foveation 56 Soft Computing Techniques for Scene Cut Detection from MPEG Compressed Video 57 Web-Based Image Authentication using Invisible Fragile Watermark 58 Information Hiding and Detection using Steganography 59 Design and Analysis of IIR Filters with Initialization...