Robust Real-Time Ellipse Detection by Direct Least-Square-Fitting

2008 ◽  
Author(s):  
Jianping Wu
Keyword(s):  
Real Time ◽  
Least Square ◽  
Least Square Fitting ◽  
Ellipse Detection

scholarly journals Real-Time Least-Square Fitting of Ellipses Applied to the RobotCub Platform

2008 ◽  
pp. 270-282
Author(s):  
Nicola Greggio ◽  
Luigi Manfredi ◽  
Cecilia Laschi ◽  
Paolo Dario ◽  
Maria Chiara Carrozza
Keyword(s):  
Real Time ◽  
Least Square ◽  
Least Square Fitting

ESTIMATING SURFACE NORMALS IN NOISY POINT CLOUD DATA

2004 ◽  
Vol 14 (04n05) ◽  
pp. 261-276 ◽  
Author(s):  
NILOY J. MITRA ◽  
AN NGUYEN ◽  
LEONIDAS GUIBAS
Keyword(s):  
Point Cloud ◽  
Smooth Surface ◽  
Smooth Curve ◽  
Local Information ◽  
Least Square ◽  
Neighborhood Size ◽  
Point Cloud Data ◽  
Cloud Data ◽  
Normal Estimation ◽  
Least Square Fitting

In this paper we describe and analyze a method based on local least square fitting for estimating the normals at all sample points of a point cloud data (PCD) set, in the presence of noise. We study the effects of neighborhood size, curvature, sampling density, and noise on the normal estimation when the PCD is sampled from a smooth curve in ℝ2or a smooth surface in ℝ3, and noise is added. The analysis allows us to find the optimal neighborhood size using other local information from the PCD. Experimental results are also provided.

scholarly journals COMPARING TWO DIFFERENT MODES OF MECHANICAL VENTILATION BY THE LEAST SQUARE FITTING METHOD: NAVA VERSUS PSV

2015 ◽  
Vol 3 (Suppl 1) ◽  
pp. A319
Author(s):  
S Spadaro ◽  
S Grasso ◽  
V Cricca ◽  
F Dalla Corte ◽  
R Di Mussi ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Least Square ◽  
Least Square Fitting ◽  
Fitting Method ◽  
Least Square Fitting Method

scholarly journals Real-time Measurement System of Cycloduction Movement Based on Fast Ellipse Detection

2007 ◽  
Vol 127 (4) ◽  
pp. 591-598 ◽  
Author(s):  
Yuusuke Sakashita ◽  
Hironobu Fujiyoshi ◽  
Yutaka Hirata ◽  
Hisanori Takamaru ◽  
Naoki Fukaya
Keyword(s):  
Real Time ◽  
Measurement System ◽  
Time Measurement ◽  
Ellipse Detection ◽  
Real Time Measurement

Digital Fractional Order Savitzky-Golay Differentiator and Its Application

2011 ◽  
Author(s):  
Dali Chen ◽  
Dingyu Xue ◽  
YangQuan Chen
Keyword(s):  
Fractional Order ◽  
Least Square ◽  
One Dimension ◽  
Order Derivative ◽  
Noisy Signal ◽  
Fractional Order Derivative ◽  
Least Square Fitting ◽  
Image Enhancing ◽  
The One ◽  
Derivatives Of

Firstly the one-dimension digital fractional order Savitzky-Golay differentiator (1-D DFOSGD), which generalizes the Savitzky-Golay filter from the integer order to the fractional order, is proposed to estimate the fractional order derivative of the noisy signal. The polynomial least square fitting technology and the Riemann-Liouville fractional order derivative definition are used to ensure robust and accuracy. Experiments demonstrate that 1-D DFOSGD can estimate the fractional order derivatives of both ideal signal and noisy signal accurately. Secondly, the two-dimension DFOSGD is obtained from 1-D DFOSGD by defining a group of direction operators, and a new image enhancing method based on 2-D DFOSGD is presented. Experiments demonstrate that 2-D DFOSGD has very good performance on image enhancement.

Estimation of missing components of Fourier Telescopy based on least square fitting

2015 ◽  
Vol 23 (1) ◽  
pp. 282-287
Author(s):  
于树海 YU Shu-hai ◽  
王建立 WANG Jian-li ◽  
董磊 DONG Lei ◽  
刘欣悦 LIU Xin-yue ◽  
王亮 WANG Liang
Keyword(s):  
Least Square ◽  
Least Square Fitting
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