On the dynamic range of coefficients generated in transform processing of digitised image data
作者:
R.J.Clarke,
期刊:
IEE Proceedings F (Communications, Radar and Signal Processing)
(IET Available online 1985)
卷期:
Volume 132,
issue 2
页码: 107-110
年代: 1985
DOI:10.1049/ip-f-1.1985.0021
出版商: IEE
数据来源: IET
摘要:
It is well known that the transform operation results in a large expansion of the numerical range of values encountered when input data is subjected to a one- or more dimensional transformation. It is usually assumed that the dynamic range expansion factor isNc, whereNis the transform order andcits dimension, but it is demonstrated here that this result is only true under very restricted conditions, and that, in general, coefficient dynamic range expansion is not only transform dependent, but is often significantly greater than the above value. It is suggested that this effect may influence the transform processing operation in feature extraction and coding applications to a greater degree than has previously been realised.
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