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This article in AJ

  1. Vol. 77 No. 6, p. 966-968
     
    Received: Dec 17, 1984
    Published: Nov, 1985


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doi:10.2134/agronj1985.00021962007700060032x

A Versatile, Inexpensive Microcomputer-Based Leaf Area Measurement System1

  1. John M. Clarke and
  2. Thomas N. McCaig2

Abstract

Abstract

An inexpensive electro-optical system was developed and evaluated for measuring leaf areas. The system consisted of a standard optical lens and circuitry to digitize images, and was interfaced with a microcomputer. Software was developed to measure total leaf areas or differential green, chlorotic, and total areas. Cost of the system, excluding the microcomputer, was under $450. The system provided accurate measurements of leaf area when the lens was positioned so that leaves being measured occupied > 5% of the useable image area.

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