Computer Control of Plant Growth by Image Processing:II. Pattern Recognition of Growth in On-line System
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概要
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Present paper deals with instrumentation of image processing and statistical pattern recognition of plant growth in on-line computer system. The nine images of a cucumber plant were taken through the vidicon camera from vertical angle of 45°, by revolving the plants on the turn table from horizontal angle of 0° to 360° at an interval of 40°. A plant image was digitized with binary notation of 256×256 in image processor by setting a constant slice level of the brightness of the plant. The digitized image was read into CPU and stored in disk memories. The nine digitized images were summed to make a synthesized image which was expressed as the compounded matrix of Eq. (2) . Clear difference in growth was observed in numerical increase and distribution of the elements of the matrix. From calculation of sum (<I>P</I>) of the elements, the quantitative growth was represented by the fuction of <I>P</I> as given by Eq. (3) . Further, in an attempt to design the classifiers for estimation of difference in feature of growth, the vertical position (<I>Jl</I>) of centroid in the compounded matrix was calculated by Eqs. (4) and (5), and relation between <I>Jl</I> and <I>P</I> was ana-lyzed statistically : From covariance analysis, regression equation of normal growth was different from that of succulent growth under 29-33°C as shown in Fig. 6. The 95% confidence limits of each regression equation given by Eq. (6) were used as the discriminant function. As shown in Fig. 7, when coordinate of the point (<I>P<SUB>i</SUB></I>, <I>Jl<SUB>i</SUB></I>) belongs to region N, the growth is estimated to be normal. When the point belongs to region S, the growth is estimated to be succulent.<BR>Thus, by image processing of plants, the growth was represented quantitatively as functions of <I>P</I>, and statistical pattern recognition in the coordinate system of <I>P</I> and <I>Jl</I> made it possible to estimate the differences in feature of the growth.
- 日本生物環境工学会の論文
日本生物環境工学会 | 論文
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