A Photo Based Measurement System using a Measuring Camera

概要

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In 1993, Minolta Camera Co., Ltd. produced a special camera, MC-100, as a prototype. It can record the size of the object that it focuses on and the distance between the camera and the object. Using this and other instruments, we developed a photo based measurement system for measuring trees. We measured diameter and tree height and the results showed that the accuracy of this system is good enough for survey or study usage. The advantages of this system are 1) it is possible to measure indirectly, 2) it is possible to measure and record at the same time and the record has a lot of information other than the measurement value, 3) it is simple and easy to operate and can be used by one person. The disadvantages are 1) it is not cost effective because each measurement requires a photos, 2) it is very hard to measure in dark conditions. However, this system has potential for general measurement of stands and forests.
森林計画学会の論文