CONTRAST-DETAIL ANALYSIS OF IMAGE DEGRADATION DUE TO LOSSY COMPRESSION

被引：10

作者：

COOK, LT

INSANA, MF

MCFADDEN, MA

HALL, TJ

COX, GG

机构：

[1] The University of Kansas Medical Center, Department of Radiology, Kansas City, Kansas, 6616-7234

来源：

MEDICAL PHYSICS | 1995年 / 22卷 / 06期

关键词：

IMAGE COMPRESSION; DISCRETE COSINE TRANSFORM; CONTRAST-DETAIL ANALYSIS; LOW-CONTRAST DETECTABILITY;

D O I：

10.1118/1.597489

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

A contrast-detail (CD) experiment was performed to study the effect of lossy compression on computed radiographic (CR) images. Digital CR images of a phantom were compressed by quantizing the full-frame discrete cosine transform and Huffman encoding the result. Since low-contrast detectability is directly linked to an important radiological task, namely, the detection of noncalcified pulmonary nodules in adult chest radiographs, the goal of the study was to quantify any loss in low-contrast detectability due to compression. Compression ratios varied significantly among compressed images, despite the use of fixed compression parameters; detectability could be specified by a single parameter of a CD curve; there was no significant reduction in detectability for an average compression ratio of 11:1; and, there was a statistically significant degradation in detectability for an average compression ratio of 125:1. © 1995, American Association of Physicists in Medicine. All rights reserved.

引用

页码：715 / 721

页数：7

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