Display Area of Sinusoidal Gratings and Low Spatial Frequency Channels,

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Abstract:

The relation between stimulus size of sine gratings and low spatial frequency channels has been systematically investigated by television technique. Experimental data suggest that the human visual system contains low spatial frequency channels. Variation of the stimulus area of gratings is a significant condition for the display of the low spatial frequency channels. It was found that as the area of sine gratings increases from 1 deg, 2 deg to 5 deg, 10 deg field, human eyes become more sensitive to the low spatial frequency, to which the position of the lowest spatial frequency channels leads. The adaptable range of low spatial frequency is extended from 3 cdeg to 0.2 cdeg. For a 10 deg visual field, the position of the lowest spatial frequency channels stays at 0.3 cdeg. The asymmetry of the bandwidth of the low spatial frequency channels has also been observed.

Author(s):
Yu, W. Z.
Author Organization(s):
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
Supplementary Note:
Edited trans. of Shengli Xuebao (China) v13 n2 p207-211 1981.
Annotation:
Display Area of Sinusoidal Gratings and Low Spatial Frequency Channels--Translation.
Pagination:
0013

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
FTD-ID(RS)T-0075-85
 Subject Terms
Joint Capability Areas:
JCA_1.2.7_Experimentation; JCA_6.1_Information Transport; JCA_6_Net Centric
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*VISION, *STIMULI, FREQUENCY, SPATIAL DISTRIBUTION, SIZES(DIMENSIONS), HUMANS, TELEVISION SYSTEMS, GRATINGS(SPECTRA), ASYMMETRY, VISUAL PERCEPTION, EYE, BANDWIDTH, LOW FREQUENCY, CHANNELS, VISUAL ACUITY, SINE WAVES
Field(s)/Group(s):
Psychology, Anatomy and Physiology
Report Date:
1985 Apr 29