publication . Article . 2002

Noise frame duration, masking potency and whiteness of temporal noise

Kukkonen, Helja; Rovamo, Jyrki; Donner, Kristian; Tammikallio, Marja; Raninen, Antii;
Open Access English
  • Published: 01 Sep 2002
  • Publisher: Association for Research in Vision and Ophthalmology
  • Country: United Kingdom
Abstract
PURPOSE. Because of the limited contrast range, increasing the duration of the noise frame is often the only option for increasing the masking potency of external, white temporal noise. This, however, reduces the high-frequency cutoff beyond which noise is no longer white. This study was conducted to determine the longest noise frame duration that produces the strongest masking effect and still mimics white noise on the detection of sinusoidal flicker. \ud \ud METHODS. Contrast energy thresholds (Eth) were measured for flicker at 1.25 to 20 Hz in strong, purely temporal (spatially uniform), additive, external noise. The masking power of white external noise, cha...
Subjects
free text keywords: RE
Related Organizations
23 references, page 1 of 2

1. Rovamo J, Raninen A, Lukkarinen S, Donner K. Flicker sensitivity as a function of spectral density of external white temporal noise. Vision Res. 1996;36:3767-3774. [OpenAIRE]

2. Rovamo J, Raninen A, Donner K. The effects of temporal noise and retinal illuminance on foveal flicker sensitivity. Vision Res. 1999; 39:533-550. [OpenAIRE]

3. Fredericksen RE, Hess RF. Temporal detection in human vision: dependence on stimulus energy. J Opt Soc Am A. 1997;14:2557- 2569. [OpenAIRE]

4. Fredericksen RE, Hess RF. Estimating multiple temporal mechanisms in human vision. Vision Res. 1998;38:1023-1040. [OpenAIRE]

5. Ahumada AJ Jr, Watson AB. Equivalent-noise model for contrast detection and discrimination. J Opt Soc Am A. 1985;2:1133-1139.

6. Legge GE, Kersten D, Burgess A. Contrast discrimination in noise. J Opt Soc Am A. 1987;4:391- 404. [OpenAIRE]

7. Burgess AE, Wagner RF, Jennings RF, Barlow HB. Efficiency of human visual signal discrimination. Science. 1981;214:93-94. [OpenAIRE]

8. Pelli D. Effects of visual noise. Thesis. Cambridge, UK: Cambridge University; 1981.

9. Rovamo J, Donner K, N¨as¨anen R, Raninen A. Flicker sensitivity as a function of target area with and without temporal noise. Vision Res. 2000;40:3841-3851. [OpenAIRE]

10. Kukkonen H, Rovamo J, N¨as¨anen R. Masking potency and whiteness of noise at various noise check sizes. Invest Ophthalmol Vis Sci.1995;36:513-518.

11. Rovamo J, Kukkonen H. The effect of noise check size and shape on grating detectability. Vision Res. 1996;36:271-279. [OpenAIRE]

12. Kukkonen H, Rovamo J, Melmoth D. Spatial integration and effective spectral density of one-dimensional noise masks. Vision Res. 1999;39:1775-1782. [OpenAIRE]

13. Pelli DG, Zhang L. Accurate control of contrast on microcomputer displays. Vision Res. 1991;31:1337-1350. [OpenAIRE]

14. Mustonen J, Rovamo J, N¨as¨anen R. The effects of grating area and spatial frequency on contrast sensitivity as a function of light level. Vision Res. 1993;33:2065-2072.

15. Watson AB. Probability summation over time. Vision Res. 1979; 19:515-522.

23 references, page 1 of 2
Any information missing or wrong?Report an Issue