The effects of grating area and spatial frequency on contrast sensitivity as a function of light level
Contrast sensitivity was measured as a function of retinal illuminance ( I) for vertical cosine gratings of various circular areas ( A) and spatial frequencies ( f ⩽ 4 c/deg). Spatial frequency and grating diameter varied in inverse proportion to each other in order to keep the relative grating area...
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| Veröffentlicht in: | Vision research (Oxford) 1993-10, Vol.33 (15), p.2065-2072 |
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| creator | Mustonen, Juvi Rovamo, Jyrki Näsänen, Risto |
| description | Contrast sensitivity was measured as a function of retinal illuminance (
I) for vertical cosine gratings of various circular areas (
A) and spatial frequencies (
f ⩽ 4 c/deg). Spatial frequency and grating diameter varied in inverse proportion to each other in order to keep the relative grating area (
A ×
f
2) constant at either 3.14,12.6, 50.3, or 201 square cycles. At all grating areas and spatial frequencies contrast sensitivity in dim light first increased in proportion to the square root of retinal illuminance. Then the increase saturated and contrast sensitivity became independent of luminance level in bright light. For gratings with constant relative area contrast sensitivity functions were similar in shape and had the same maximum sensitivity but were shifted horizontally towards lower illuminances with decreasing spatial frequency. However, when replotted as a function of retinal illuminance divided by spatial frequency squared, contrast sensitivity functions fell on a common curve at all levels of relative retinal illuminance (
I/f
2). |
| doi_str_mv | 10.1016/0042-6989(93)90005-H |
| format | Article |
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I) for vertical cosine gratings of various circular areas (
A) and spatial frequencies (
f ⩽ 4 c/deg). Spatial frequency and grating diameter varied in inverse proportion to each other in order to keep the relative grating area (
A ×
f
2) constant at either 3.14,12.6, 50.3, or 201 square cycles. At all grating areas and spatial frequencies contrast sensitivity in dim light first increased in proportion to the square root of retinal illuminance. Then the increase saturated and contrast sensitivity became independent of luminance level in bright light. For gratings with constant relative area contrast sensitivity functions were similar in shape and had the same maximum sensitivity but were shifted horizontally towards lower illuminances with decreasing spatial frequency. However, when replotted as a function of retinal illuminance divided by spatial frequency squared, contrast sensitivity functions fell on a common curve at all levels of relative retinal illuminance (
I/f
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I) for vertical cosine gratings of various circular areas (
A) and spatial frequencies (
f ⩽ 4 c/deg). Spatial frequency and grating diameter varied in inverse proportion to each other in order to keep the relative grating area (
A ×
f
2) constant at either 3.14,12.6, 50.3, or 201 square cycles. At all grating areas and spatial frequencies contrast sensitivity in dim light first increased in proportion to the square root of retinal illuminance. Then the increase saturated and contrast sensitivity became independent of luminance level in bright light. For gratings with constant relative area contrast sensitivity functions were similar in shape and had the same maximum sensitivity but were shifted horizontally towards lower illuminances with decreasing spatial frequency. However, when replotted as a function of retinal illuminance divided by spatial frequency squared, contrast sensitivity functions fell on a common curve at all levels of relative retinal illuminance (
I/f
2).</description><subject>Adult</subject><subject>Biological and medical sciences</subject><subject>Contrast sensitivity</subject><subject>Contrast Sensitivity - physiology</subject><subject>DeVries-Rose law</subject><subject>Form Perception</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Light</subject><subject>Luminous flux</subject><subject>Perception</subject><subject>Psychology. Psychoanalysis. Psychiatry</subject><subject>Psychology. Psychophysiology</subject><subject>Retina - physiology</subject><subject>Spatial integration</subject><subject>Vision</subject><subject>Visual Acuity</subject><subject>Weber's law</subject><issn>0042-6989</issn><issn>1878-5646</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkcGLUzEQxoMoa3f1P1DIQUQPT5O8JC-5LMjiWmHBy3oO07xJN_KaV5O00P_e1JYe9TTMzG8-hu8j5A1nnzjj-jNjUnTaGvvB9h8tY0x1y2dkwc1gOqWlfk4WF-QluS7lV2MGJewVuTJCay3NgoTHJ6QYAvpa6BzoOkONaU0hI1BIIy3bNoCJhoy_d5j8gc6J-jnVDKXSgqnEGvexHigUCjTskq-xIU1riuunSifc4_SKvAgwFXx9rjfk5_3Xx7tl9_Dj2_e7Lw-dl9rUrg9KSAXGspENKwteCeF1bz1yE2CF2FsUfQArmJccjOZKGy2DD6K10vc35P1Jd5vn9m6pbhOLx2mChPOuuEFzrpS2_wW5HqyWTDZQnkCf51IyBrfNcQP54Dhzxxzc0WR3NNnZ3v3NwS3b2duz_m61wfFydDa-7d-d91A8TCFD8rFcMGmYaUoNuz1h2EzbR8yu-NhSwDHmFpkb5_jvP_4ASiGkdw</recordid><startdate>19931001</startdate><enddate>19931001</enddate><creator>Mustonen, Juvi</creator><creator>Rovamo, Jyrki</creator><creator>Näsänen, Risto</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TK</scope><scope>7X8</scope></search><sort><creationdate>19931001</creationdate><title>The effects of grating area and spatial frequency on contrast sensitivity as a function of light level</title><author>Mustonen, Juvi ; Rovamo, Jyrki ; Näsänen, Risto</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c468t-3f5245a890d07b9ac522c639ce18fabee39e23fa920c41a86156864fcf241a4c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>Adult</topic><topic>Biological and medical sciences</topic><topic>Contrast sensitivity</topic><topic>Contrast Sensitivity - physiology</topic><topic>DeVries-Rose law</topic><topic>Form Perception</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Light</topic><topic>Luminous flux</topic><topic>Perception</topic><topic>Psychology. Psychoanalysis. Psychiatry</topic><topic>Psychology. Psychophysiology</topic><topic>Retina - physiology</topic><topic>Spatial integration</topic><topic>Vision</topic><topic>Visual Acuity</topic><topic>Weber's law</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mustonen, Juvi</creatorcontrib><creatorcontrib>Rovamo, Jyrki</creatorcontrib><creatorcontrib>Näsänen, Risto</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Neurosciences Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Vision research (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mustonen, Juvi</au><au>Rovamo, Jyrki</au><au>Näsänen, Risto</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The effects of grating area and spatial frequency on contrast sensitivity as a function of light level</atitle><jtitle>Vision research (Oxford)</jtitle><addtitle>Vision Res</addtitle><date>1993-10-01</date><risdate>1993</risdate><volume>33</volume><issue>15</issue><spage>2065</spage><epage>2072</epage><pages>2065-2072</pages><issn>0042-6989</issn><eissn>1878-5646</eissn><coden>VISRAM</coden><abstract>Contrast sensitivity was measured as a function of retinal illuminance (
I) for vertical cosine gratings of various circular areas (
A) and spatial frequencies (
f ⩽ 4 c/deg). Spatial frequency and grating diameter varied in inverse proportion to each other in order to keep the relative grating area (
A ×
f
2) constant at either 3.14,12.6, 50.3, or 201 square cycles. At all grating areas and spatial frequencies contrast sensitivity in dim light first increased in proportion to the square root of retinal illuminance. Then the increase saturated and contrast sensitivity became independent of luminance level in bright light. For gratings with constant relative area contrast sensitivity functions were similar in shape and had the same maximum sensitivity but were shifted horizontally towards lower illuminances with decreasing spatial frequency. However, when replotted as a function of retinal illuminance divided by spatial frequency squared, contrast sensitivity functions fell on a common curve at all levels of relative retinal illuminance (
I/f
2).</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><pmid>8266648</pmid><doi>10.1016/0042-6989(93)90005-H</doi><tpages>8</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Vision research (Oxford), 1993-10, Vol.33 (15), p.2065-2072 |
| issn | 0042-6989 1878-5646 |
| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals Complete |
| subjects | Adult Biological and medical sciences Contrast sensitivity Contrast Sensitivity - physiology DeVries-Rose law Form Perception Fundamental and applied biological sciences. Psychology Humans Light Luminous flux Perception Psychology. Psychoanalysis. Psychiatry Psychology. Psychophysiology Retina - physiology Spatial integration Vision Visual Acuity Weber's law |
| title | The effects of grating area and spatial frequency on contrast sensitivity as a function of light level |
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