Two new methods for 3-D measurement for PTZ (Pan, Tilt, and Zoom) camera control on linear and curved slopes are proposed. We assume there are two cameras: one PTZ and one fixed. If one point is chosen in the image from fixed camera, pan and tilt of PTZ camera are controlled to place
that point in the center of PTZ camera view. To do this, we need a mechanism that automatically computes pan and tilt of PTZ camera to move to the designated point. Interpolation may be used, but it requires at least 4 ground truth points and measurement error increases as sample points deviate
from ground truth points. In our earlier work, we proposed 3D measurement methods that use only one ground truth point and are applicable only to flat road surface. Roads in real world have various slopes and curvatures. In this paper, we extend our work to allow more general road surface
geometry including linear and curved slopes. We applied methods to real world environment and obtained good results.
The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.