Internal noise determines external stochastic resonance in visual perception

Aihara, Toshinori; Kitajo, Keiichi; Nozaki, Daichi; Yamamoto, Yoshiharu

doi:10.1016/j.visres.2008.04.022

Cited by 49 publications

(54 citation statements)

References 23 publications

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“…Recently, we reported a study that tested experimentally the hypothesis using a visual detection experiment [54]. In the experiment, subjects viewed two images on a CRT monitor through a mirror stereoscope used to fuse the two images, each of which was separately presented to the left and the right eyes.…”

Section: Internal Noise and External Stochastic Resonancementioning

confidence: 99%

“…Based on previous findings [36,52,54], we consider that the effect of noise can be incorporated into the two parameters a and b of the psychometric function (Eq. (1)).…”

Section: Psychometric Function For Stochastic Resonancementioning

confidence: 99%

“…(5)-(7)) to each subject's data obtained with the method of constant stimuli (i.e., data in [54]). The v 2 test revealed that the function was not different from the data in most (14 of the 19) subjects (v 2 < 28.06, df = 20, p > 0.1; Supplementary Table 1).…”

Section: Psychometric Function For Stochastic Resonancementioning

confidence: 99%

See 2 more Smart Citations

How does stochastic resonance work within the human brain? – Psychophysics of internal and external noise

Aihara¹,

Kitajo

Nozaki

et al. 2010

Chemical Physics

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Section: Internal Noise and External Stochastic Resonancementioning

confidence: 99%

“…Based on previous findings [36,52,54], we consider that the effect of noise can be incorporated into the two parameters a and b of the psychometric function (Eq. (1)).…”

Section: Psychometric Function For Stochastic Resonancementioning

confidence: 99%

See 1 more Smart Citation

How does stochastic resonance work within the human brain? – Psychophysics of internal and external noise

Aihara¹,

Kitajo

Nozaki

et al. 2010

Chemical Physics

Self Cite

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“…Both external and internal SR has been demonstrated [28]. For internal SR, at least two sites are possible, receptors and the central nervous system (CNS) neurons [29].…”

Section: Subliminal Summation Of Signal and Noisementioning

confidence: 99%

Validation of a Vibrotactile Stimulation System Using the Wii Remote for Studies of Tactile Sensitivity

Sugimoto¹,

Sasaki²

2017

TOPSYJ

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Background:Vibrotactile stimuli are widely used to study the functional characteristics of the haptic sense. Although many vibrotactile stimulators are commercially available, most are expensive. Objective:We developed a low-cost vibrotactile stimulation system using a Nintendo Wii Remote and a personal computer. In the present study, we examined the validity and accuracy of this vibrotactile stimulation system. Method:In the first experiment, we measured the linearity of vibration amplitude and changes in peak vibration frequency generated by the Wii Remote as a function of activation intensity. In the second experiment, the effect of vibrotactile stimuli applied to the dorsal surface of hand on two-point discrimination threshold at the index finger was examined in twelve participants. Results:The peak vibration frequency was about 150 Hz irrespective of vibration intensity, which would effectively activate fast adapting type II (FAII) cutaneous mechanical receptors. The two-point discrimination threshold measured at the third pad of the index finger decreased significantly when a near-threshold vibrotactile stimulus was applied to the dorsal hand, a response termed stochastic resonance (SR). These SR results are consistent with findings in the other sensory systems, such as auditory, visual, and somatosensory systems. Conclusion:This newly developed stimulation system produces controllable vibrotactile stimuli useful for study of the haptic sense.

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“…Indeed, the basic SR approach has recently been explored for tumour segmentation in X-ray mammograms [20,21]. Recent work by Aihara et al [22] suggests that some observers benefit more from internal noise SR than others, which may help to explain interobserver variation.…”

Section: Human Image Interrogationmentioning

confidence: 99%

Automated delineation of radiotherapy volumes: are we going in the right direction?

Whitfield¹,

Price²,

Price³

et al. 2013

BJR

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ABSTRACT. Rapid and accurate delineation of target volumes and multiple organs at risk, within the enduring International Commission on Radiation Units and Measurement framework, is now hugely important in radiotherapy, owing to the rapid proliferation of intensity-modulated radiotherapy and the advent of four-dimensional image-guided adaption. Nevertheless, delineation is still generally clinically performed with little if any machine assistance, even though it is both time-consuming and prone to interobserver variation. Currently available segmentation tools include those based on image greyscale interrogation, statistical shape modelling and body atlas-based methods. However, all too often these are not able to match the accuracy of the expert clinician, which remains the universally acknowledged gold standard. In this article we suggest that current methods are fundamentally limited by their lack of ability to incorporate essential human clinical decision-making into the underlying models. Hybrid techniques that utilise prior knowledge, make sophisticated use of greyscale information and allow clinical expertise to be integrated are needed. This may require a change in focus from automated segmentation to machine-assisted delineation. Similarly, new metrics of image quality reflecting fitness for purpose would be extremely valuable. We conclude that methods need to be developed to take account of the clinician's expertise and honed visual processing capabilities as much as the underlying, clinically meaningful information content of the image data being interrogated. We illustrate our observations and suggestions through our own experiences with two software tools developed as part of research council-funded projects.

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Internal noise determines external stochastic resonance in visual perception

Cited by 49 publications

References 23 publications

How does stochastic resonance work within the human brain? – Psychophysics of internal and external noise

How does stochastic resonance work within the human brain? – Psychophysics of internal and external noise

Validation of a Vibrotactile Stimulation System Using the Wii Remote for Studies of Tactile Sensitivity

Automated delineation of radiotherapy volumes: are we going in the right direction?

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