The objective of this paper is to describe how thermography can be used to make almost invisible parts of plants visible. The technique is based on using differences in the heat capacity together with thermography. The aim of the project described here is to examine the possibility of automated classification of plants where the classification parameter is the number of non-blown buds (green buds among green leaves). Two principles are described, one where the plants are heated before classification in room temperature and the other where the plants are cooled before classification. The plants used in this experiment are roses (pot roses). The thermographic images are subsequently exposed to image processing in order to locate the buds and to count them. The image processing is not part of this paper.
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