Ultrasound image coding using shape-adaptive DCT and adaptive quantization

Carmen de Sola Fabregas; Tri Nguyen

doi:10.1117/12.273911

7 May 1997 Ultrasound image coding using shape-adaptive DCT and adaptive quantization

Carmen de Sola Fabregas, Tri Nguyen

Proceedings Volume 3031, Medical Imaging 1997: Image Display; (1997) https://doi.org/10.1117/12.273911
Event: Medical Imaging 1997, 1997, Newport Beach, CA, United States

Abstract

This paper presents a new scheme for compression of ultrasound images based on a variant of discrete cosine transform (DCT), called 'shape adaptive DCT' (SA DCT). This method exploits the fact that the clinical information of echo-cardiographic images does not occupy the whole image.SA DCT is a block based scheme that has ben designed specifically for encoding regions of arbitrary shape. Only the pixels belonging to the region of interest (ROI) are considered for coding. For each block, a mask specifying the ROI is also transmitted. Further coding efficiency can be gained by adapting the selection of the quantization table for each block. We report experimental results using eleven different quantization tables including two that are used in MPEG. Results of this scheme applied to echo-cardiographic ultrasound images are compared with those obtained using the classical DCT and the JPEG compression method. We show that the proposed method produces better results.

Citation Download Citation

Carmen de Sola Fabregas and Tri Nguyen "Ultrasound image coding using shape-adaptive DCT and adaptive quantization", Proc. SPIE 3031, Medical Imaging 1997: Image Display, (7 May 1997); https://doi.org/10.1117/12.273911

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available