In comparison with the numerical data of fresh weight or size of plant, its color image data of plant growth gives us much qualitative information on the plant factory products. Handling of the images in the environmental control system in the plant factories was discussed to realize quality control and intentional production. Morphing algorithm was used to obtain continuous morphological response of affected by the environmental change from two distinctive real growth images. The prototype system was developed using spinach (Spinacia oleracea L. cv. “Lead”) growth images under cultivating different PPFD. The morphing algorithm produced 23 snapshots as intermediate image from the two spinach growth images. The whole image was installed in the environmental control system for spinach production. The users could decide the fitting PPFD control setpoint based upon interactions between the spinach growth image and the artificial lighting cost. It is considered that the result shows a possibility to handle plant growth information in the environmental control systems.
In the present study, in order to investigate the psychological effect of ornamental foliage plants on human being, the authors carried out the following two experiments. The experiment (1) was the evaluation of the impression of ornamental foliage plants. The authors obtained the information about the impression of sixteen kinds of ornamental foliage plants through questionnaires from one hundred and two students (seventy-eight male and twenty-four female) who served as subjects. As the results, the ornamental foliage plants which were evaluated as “restful” were Cupressus macrocarpa “Gold Crest”, Ficus benjamina “Rich” and Dracaena fragrans “Massangeana”. The ornamental foliage plants which were evaluated as “refreshing” were Chrysalidocapus lutescens and Dracaena fragrans “Massangeana”. The experiment (2) was the psychological rating of the rooms with ornamental foliage plants by means of semantic differential method. Sixteen types of rooms without plants or with ornamental foliage plants were rated by sixteen students (eight male and eight female) using twenty-two SD scales and factor analysis was performed. As the results, the first factor “evaluation”, the second factor “activity” and the third factor “energy” were extracted by the factor analysis. The rooms with plants were evaluated higher than the rooms without plants in the first factor “evaluation” and the second factor “activity”. As for the arrangement of plants, the rooms with plants interspersed in the room were evaluated a little higher in the first factor “evaluation” than the rooms with plants in line inside the window.
A mathematical model for the calculation of illumination for the inclined cultivation plane that is used for the stereoscopic plant cultivation equipment was constructed and it's adequacy verified by measuring illumination. then, the optimum placement of lighting fixtures e. g. lighting fixtures's variety interval, height etc. was searched using computer simulation based on the mathematical model. Result shows that average illumination (about 20 klx) and nearly uniform illumination distribution on the inclined cultivation plane were obtained with minimum number of lamps.