1991 Volume 53 Issue 4 Pages 85-92
For the basis of measuring the elongation of plant leaf, a theoretical equation was presented to determine three dimensional curve length by the use of image processing technique.
The equation was applied to estimate the length of simulated aluminum leaf and the measuring accuracy was examined. The theoretical equation requires the data set extracted from two digital images of curve at different angles to TV camera.
It was theoretically found that the propagation of measuring errors became minimum when the angle between the digital images was 90 degrees. The measuring accuracy was confirmed by the examination using the plant leaf model, and was less than twice as large as the resolution error of digital image.
