A New Method of Measuring the Blocking Effects of Images Based on Cepstral Information

Hiromu KODA; Hatsukazu TANAKA

A New Method of Measuring the Blocking Effects of Images Based on Cepstral Information

Hiromu KODA, Hatsukazu TANAKA

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The transform coding scheme is often used for data compression of images, but the blocking effects peculiar to the scheme appear more clearly in reproduced images as a coding rate (bits/pixel) decreases. These effects can sometimes be viewed as a periodical square-grid overlaying the images. In this paper,we propose a new method for selectively measuring the above blocking effects among several types of image degradation by means of the techniques of nonlinear signal processing for spectral infomation (cepstral techniques), in order to compare the amount of blocking effects for the different coding images. First a two-component model which consists of DC and AC images, is discussed from a viewpoint of subimage-by-subimage coding, and some basic properties of cepstral information for the model are investigated. Then we show a procedure to compute the cepstral information for two-dimensional image signals taking the horizontal and vertical directions ioto account, and introduce a cepstral mean square error (CMSE) as a new measure to estimate the amount of blocking effects. The computer simulation results for some test images using different coding schemes show that the amount of blocking effects in each image can be easily measured and estimated by this method even when the blocking effects appear slightly.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E79-A No.8 pp.1274-1282

Publication Date: 1996/08/25

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Type of Manuscript: PAPER

Category: Image Theory

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Hiromu KODA, Hatsukazu TANAKA, "A New Method of Measuring the Blocking Effects of Images Based on Cepstral Information" in IEICE TRANSACTIONS on Fundamentals, vol. E79-A, no. 8, pp. 1274-1282, August 1996, doi: .
Abstract: The transform coding scheme is often used for data compression of images, but the blocking effects peculiar to the scheme appear more clearly in reproduced images as a coding rate (bits/pixel) decreases. These effects can sometimes be viewed as a periodical square-grid overlaying the images. In this paper,we propose a new method for selectively measuring the above blocking effects among several types of image degradation by means of the techniques of nonlinear signal processing for spectral infomation (cepstral techniques), in order to compare the amount of blocking effects for the different coding images. First a two-component model which consists of DC and AC images, is discussed from a viewpoint of subimage-by-subimage coding, and some basic properties of cepstral information for the model are investigated. Then we show a procedure to compute the cepstral information for two-dimensional image signals taking the horizontal and vertical directions ioto account, and introduce a cepstral mean square error (CMSE) as a new measure to estimate the amount of blocking effects. The computer simulation results for some test images using different coding schemes show that the amount of blocking effects in each image can be easily measured and estimated by this method even when the blocking effects appear slightly.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e79-a_8_1274/_p

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@ARTICLE{e79-a_8_1274,
author={Hiromu KODA, Hatsukazu TANAKA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A New Method of Measuring the Blocking Effects of Images Based on Cepstral Information},
year={1996},
volume={E79-A},
number={8},
pages={1274-1282},
abstract={The transform coding scheme is often used for data compression of images, but the blocking effects peculiar to the scheme appear more clearly in reproduced images as a coding rate (bits/pixel) decreases. These effects can sometimes be viewed as a periodical square-grid overlaying the images. In this paper,we propose a new method for selectively measuring the above blocking effects among several types of image degradation by means of the techniques of nonlinear signal processing for spectral infomation (cepstral techniques), in order to compare the amount of blocking effects for the different coding images. First a two-component model which consists of DC and AC images, is discussed from a viewpoint of subimage-by-subimage coding, and some basic properties of cepstral information for the model are investigated. Then we show a procedure to compute the cepstral information for two-dimensional image signals taking the horizontal and vertical directions ioto account, and introduce a cepstral mean square error (CMSE) as a new measure to estimate the amount of blocking effects. The computer simulation results for some test images using different coding schemes show that the amount of blocking effects in each image can be easily measured and estimated by this method even when the blocking effects appear slightly.},
keywords={},
doi={},
ISSN={},
month={August},}

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TY - JOUR
TI - A New Method of Measuring the Blocking Effects of Images Based on Cepstral Information
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1274
EP - 1282
AU - Hiromu KODA
AU - Hatsukazu TANAKA
PY - 1996
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E79-A
IS - 8
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - August 1996
AB - The transform coding scheme is often used for data compression of images, but the blocking effects peculiar to the scheme appear more clearly in reproduced images as a coding rate (bits/pixel) decreases. These effects can sometimes be viewed as a periodical square-grid overlaying the images. In this paper,we propose a new method for selectively measuring the above blocking effects among several types of image degradation by means of the techniques of nonlinear signal processing for spectral infomation (cepstral techniques), in order to compare the amount of blocking effects for the different coding images. First a two-component model which consists of DC and AC images, is discussed from a viewpoint of subimage-by-subimage coding, and some basic properties of cepstral information for the model are investigated. Then we show a procedure to compute the cepstral information for two-dimensional image signals taking the horizontal and vertical directions ioto account, and introduce a cepstral mean square error (CMSE) as a new measure to estimate the amount of blocking effects. The computer simulation results for some test images using different coding schemes show that the amount of blocking effects in each image can be easily measured and estimated by this method even when the blocking effects appear slightly.
ER -