제어로봇시스템학회:학술대회논문집
- 1992.10b
- /
- Pages.526-531
- /
- 1992
Computation of partial derivatives from an image
- Yang, Woo-Suk (Dept. of Electrical Engineering, Hongik University, ChoChiWon-Up YeonKi-Kun, Chung Nam, Korea 339-800) ;
- Han, Inhwan (Dept of Mechanical Design and Production Engineering Hongik University)
- Published : 1992.10.01
Abstract
Partial derivatives are easily computed analytically assuming that all the geometric information is known. However, there are computational difficulties in getting accurate partial derivatives directly from a range image since an image is a discrete version of continuous data contaminated with some noise. In this paper, we develop a general window function to compute partial derivatives based on the least square surface fitting method. A dynamic selective surface fitting method is introduced to make the window less sensitive to noise. Any degree of partial derivative can be obtained by a simple convolution between an image and window functions.
Keywords