Distortion Identification Based Image and Video Quality Assessment

Computing & Wireless : Computing Methods

Available for licensing


  • Alan Bovik, Ph.D. , Electrical and Computer Engineering
  • Anush Moorthy , Electrical and Computer Engineering

Background/unmet need

Image and video quality assessment is an important area of research for anyone creating and transmitting images, such as camera companies, cell phone makers, internet service providers, and cable providers. “No-reference image and video quality assessment ” refers to creation of algorithms that predict how the quality of an image or a video would be perceived by a human observer without access to the original image or video. Current algorithms for no-reference quality assessment require foreknowledge as to the particular method of distortion. However, in practical applications such knowledge may not be available.

Invention Description

This is a novel process for gauging the quality of an original image or video from a distorted representation, without knowledge of the type of distortion the media has undergone. This process is composed of two parts: the identification of the type of distortion, and the execution of a quality assessment algorithm to quantify the quality of the original.


  • Provides quality of service to end-user, quality-based compression, and quality-based bit-rate allocation.
  • Has wide-ranging applications of considerable scope, including distorted images statistics (DIS) based quality assessment and blind image distortion correction.
  • Allows for the automatic assessment of digital image and video quality in a manner that correlates to subjective human judgment.


    Can receive an image as an input, classify it into one of these distortion categories, and then assess quality using a predetermined algorithm.

Market potential/applications

Areas requiring the transmission of images and/or video, focused on providing high-quality images and videos to consumers and other parties. For example: digital camera technology (and cell phone technology), cable television providers, digital display manufacturers, digital cinema industry, laptop manufacturers, airline entertainment system manufacturers, multimedia software providers, internet service providers, and many others.

IP Status