Samenvatting
Direct category scaling and a scaling procedure in accordance with Functional
Measurement Theory (Anderson, 1982) have been used to assess impairment
in scale-space-coded illlages, displayed on a black-and-white TV monitor.
The image of a complex scene was passed through a Gaussian filter of limited
bandwidth. A 'prediction image' of the original image was made from this
bandlimited signal. The degree of quantisatioll of the 'prediction error image' ,
obtained by subtracting the prediction image from the original one, determined
the impairment in the reconstructed image. Category scaling of impairment
and category scaling of differences ill impairment, created by presenting the
images according to a factorial design as dictated by Functional MeiUlurement
Tileory, gave the same monotone S-shaped relation between impairment and
size of the quantisation step. The impairment consisted of unsharpness and
occurrence of speckles. A second series of experiments was carried out to scale
these percepts. The relation between unsharplless, occurrence of speckles and
impairment is discussed.
Originele taal-2 | Engels |
---|---|
Pagina's (van-tot) | 55-64 |
Aantal pagina's | 10 |
Tijdschrift | IPO Annual Progress Report |
Volume | 23 |
Status | Gepubliceerd - 1988 |