Foveated video quality assessment

نویسندگان

  • Sanghoon Lee
  • Marios S. Pattichis
  • Alan C. Bovik
چکیده

Most image and video compression algorithms that have been proposed to improve picture quality relative to compression efficiency have either been designed based on objective criteria such as signal-to-noise-ratio (SNR) or have been evaluated, post-design, against competing methods using an objective sample measure. However, existing quantitative design criteria and numerical measurements of image and video quality both fail to adequately capture those attributes deemed important by the human visual system, except, perhaps, at very low error rates. We present a framework for assessing the quality of and determining the efficiency of foveated and compressed images and video streams. Image foveation is a process of nonuniform sampling that accords with the acquisition of visual information at the human retina. Foveated image/video compression algorithms seek to exploit this reduction of sensed information by nonuniformly reducing the resolution of the visual data. We develop unique algorithms for assessing the quality of foveated image/video data using a model of human visual response. We demonstrate these concepts on foveated, compressed video streams using modified (foveated) versions of H.263 that are standard-compliant. We find that quality vs. compression is enhanced considerably by the foveation approach.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Fast algorithms for foveated video processing

This paper explores the problem of communicating high-quality, foveated video streams in real time. Foveated video exploits the nonuniform resolution of the human visual system by preferentially allocating bits according to proximity to assumed visual xation points, thus delivering perceptually high quality at greatly reduced bandwidths. Foveated video streams possess speci c data density prope...

متن کامل

Foveated Vision and Video Quality Evaluation

The using of characteristics of the human visual system (HVS) can significantly improve the efficiency of video coding process. Enhanced coding processes take into account the high spatial variability of HVS in sampling, coding and understanding of visual information. The highest visual sensitivity is at the point of fixation and decreases rapidly with distance from that point. Foveated image a...

متن کامل

Motion Estimation and Compensation for Foveated Video

Utilizing the nonuniform resolution property of the human visual system, foveated video can provide high visual quality relative to non-foveated video by allocating more bits to the central foveation area. In this paper, we present a motion estimation and compensation algorithm for foveated video and measure the performance using a new measure of visual delity termed foveal mean absolute distor...

متن کامل

Motion Estimation and Compensation of H.263 Video via Foveation

The human visual system (HVS) samples the external world non-uniformly. Utilizing this property in video compression, more bits can be allocated around the point of xation, i.e. the foveation point, to produce low bit rate foveated video. For the same bit rate, foveated video will have higher subjective quality compared to unfoveated video for a single observer. Utilizing the foveation property...

متن کامل

Foveated video compression with optimal rate control

Previously, fovcated 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. We describe such a framework here where foveated video is created by a nonuniform filtering scheme that increases the compressibility of the video stream. We maximize a new foveal vis...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • IEEE Trans. Multimedia

دوره 4  شماره 

صفحات  -

تاریخ انتشار 2002