video bit reduction based on foveation 12686

video bit reduction based on foveation

video bit reduction based on foveation (PDF) Effect of compressed offline foveated video on , Since offline foveation introduces blur in unattended video regions and thus reduces entropy, it is expected to increase compression efficiency We have estimated the effect offline foveation has on data reduction for the six different videos shown.

Real-time foveation techniques for low bit rate video

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.

video bit reduction based on 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.

BibSLEIGH — video tag

An event-based video retrieval system by combining broadcasting baseball video and web , An HVS-based Adaptive Computational Complexity Reduction Scheme for H264/AVC video encoder using Prognostic Early Mode Exclusion (MS, BM, JH), pp , Impact of bit-width specification on the memory hierarchy for a real-time video processing.

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.

Spatialchromatic 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.

Foveation-based reduced resolution driving scheme for

This paper introduces a foveation-based driving scheme that can extend line times for high-resolution and wide viewing angle displays in virtual reality applications.

Foveated Video Streaming for Cloud Gaming

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.

(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.

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.

Laboratory for Image and Video Engineering

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.

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.

(PDF) Foveation-Based Error Resilience and Unequal Error

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.

CHAPTER 1

In this section describes the estimation for possible bit rate reduction for a simple bit-rate reduction scheme This method assumes that the area of RW is encoded with highest possible quality and the rest of the video frame is encoded with a fraction of the RW quality (451) is overall possible compression F(i) represents video frame.

Off-line Foveated Video: Effects on Compression and

Off-line Foveated Video: Effects on Compression and Perception , 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 with 12 pictures.

Joint perceptually-based Intra prediction and quantization

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.

أفكار مقترحة لمشاريع التخرج لتخصص هندسة الاتصالات

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.

Real-time foveation techniques for low bit rate video

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.

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 reduction.

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.

A practical foveation-based rate-shaping mechanism for

Request PDF on ResearchGate

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.

Real-Time Foveation Techniques for Low Bit Rate Video

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 possible.

Zhou Wang's Publications

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.