JPS5777945A - Discriminating method for road surface condition - Google Patents

Discriminating method for road surface condition

Info

Publication number
JPS5777945A
JPS5777945A JP15422280A JP15422280A JPS5777945A JP S5777945 A JPS5777945 A JP S5777945A JP 15422280 A JP15422280 A JP 15422280A JP 15422280 A JP15422280 A JP 15422280A JP S5777945 A JPS5777945 A JP S5777945A
Authority
JP
Japan
Prior art keywords
road surface
photographed
found
picture
reflection luminance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15422280A
Other languages
Japanese (ja)
Inventor
Suteo Tsutsumi
Yasumasa Itakura
Keiji Fujimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Ten Ltd
Original Assignee
Denso Ten Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP15422280A priority Critical patent/JPS5777945A/en
Publication of JPS5777945A publication Critical patent/JPS5777945A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To enable to conduct a quantitative discrimination of a desired road surface in a non-contact manner, by a method wherein the road surface is photographed, distribution of a reflection luminance and a radiation luminance is measured through the scanning of the photograph picture to find a self-correlative function thereof. CONSTITUTION:A desired road surface part 2 to be discriminated of a road surface 1 is photographed by a camera 3 to form the negative picture of the road surface part 2 on a light transmitting monochrome negative film 4. A negative picture 5 of a road surface photographed on the negative film 4 is scanned in the direction of an arrow mark 6 using a microdensitometer. With this, the concentration each of a large number of regions 7 is found in a scanning direction 6 and at every equal intervals in the adjoining direction 6, and the reflection luminance distribution of the negative picture 5, in which the reflection luminance of the road surface part 2 is indicated in a shade of a monocolor, is found. A self-correlative function phi(r) of the reflection luminance distribution is found thereupon, and this permits the quantitative discrimination of a road surface condition in a non-contact manner.
JP15422280A 1980-10-31 1980-10-31 Discriminating method for road surface condition Pending JPS5777945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15422280A JPS5777945A (en) 1980-10-31 1980-10-31 Discriminating method for road surface condition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15422280A JPS5777945A (en) 1980-10-31 1980-10-31 Discriminating method for road surface condition

Publications (1)

Publication Number Publication Date
JPS5777945A true JPS5777945A (en) 1982-05-15

Family

ID=15579511

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15422280A Pending JPS5777945A (en) 1980-10-31 1980-10-31 Discriminating method for road surface condition

Country Status (1)

Country Link
JP (1) JPS5777945A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60233534A (en) * 1984-03-13 1985-11-20 シンテツクス（ユ−・エス・エイ）インコ−ポレイテツド Method and device for analyzing sample by using electromagnetic signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60233534A (en) * 1984-03-13 1985-11-20 シンテツクス（ユ−・エス・エイ）インコ−ポレイテツド Method and device for analyzing sample by using electromagnetic signal

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