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Method and apparatus for banding artifact detection

A technique for artifacts and banding, applied in the field of banding artifacts

Inactive Publication Date: 2011-07-06
INTERDIGITAL VC HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this is a difficult problem that well-accepted traditional objective measures such as Peak Signal-to-Noise Ratio (PSNR) do not handle well

Method used

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  • Method and apparatus for banding artifact detection
  • Method and apparatus for banding artifact detection
  • Method and apparatus for banding artifact detection

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Embodiment Construction

[0017] The present principles provide a method and apparatus to (i) locate the location of banding artifacts, (ii) determine the intensity of banding artifacts per block, and (iii) determine the overall banding artifacts per picture strength.

[0018] figure 1 A high-level flowchart of a banding artifact detection method 10 according to an implementation of the present principles is shown. In this implementation, banding artifact detection is accomplished by first masking (12) one or more target pictures and then locating candidate banding artifact regions. The candidate banding artifact regions are then filtered (14) to eliminate isolated regions. Each pixel in the proposal region is then subjected to local spatial or temporal background evaluation to reduce false detections. A pixel-level decision is then made (16) as to whether the pixel is part of a banding artifact area. The pixel-level decisions may then be further transformed or calculated (18) to determine a bandin...

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Abstract

A method and apparatus for detecting banding artifacts in digital images and video contents. The method operates to (i) find the locations of the banding artifacts, (ii) determine the strength of the banding artifact per block, and (iii) determine overall banding artifact strength per picture. The banding artifact detection and strength assignment is done by first finding areas that are prone to banding artifact and then considering the local characteristics of the area to reduce the false detection. The banding artifact strength of a picture is determined by considering the size and the strength of the artifact areas in this picture as well as the artifact strength in the neighboring pictures.

Description

technical field [0001] The principles of the present invention relate to processing digital image and video content. More specifically, they relate to detecting banding artifacts in digital image and video content. Background technique [0002] Non-real-time image and video processing applications such as DVD authoring are intended to achieve the best possible visual quality through image and video processors. To achieve this goal, the processed image or video content is re-examined to identify pictures with artifacts. This is usually a manual subjective process that requires sufficient experience, and the time and effort involved will affect production time and budget. This process is also often inconsistent due to different visual assessment criteria used by different raters. In general practice, the detected pictures are post-processed or re-encoded with fine-tuned parameters, and then further re-detected. For better picture quality, post-processing and re-encoding al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/00H04N7/26H04N19/146
CPCG06T5/002H04N7/26053H04N19/00278H04N7/26196H04N7/26244H04N19/0026H04N19/00193G06T2207/10016H04N7/26122H04N7/26276H04N7/26888G06T5/001G06T2207/20032G06T7/0002H04N19/00781H04N19/00909H04N7/5033H04N19/0006H04N19/0009H04N19/00139H04N19/002H04N19/176H04N19/115H04N19/61H04N19/124H04N19/136H04N19/152H04N19/154H04N19/17H04N19/86G06T5/70G06T5/00G06T7/00H04N19/146
Inventor 李振艾迪尔·阿巴斯路小安克里斯蒂娜·古米拉
Owner INTERDIGITAL VC HLDG INC