Abstract
We propose an image motion constraint equation based on a model which allows the brightness of a scene point to vary with time, unlike the case in the brightness constancy model. Using this model, we describe a method for the computation of optical flow and investigate its performance in a variety of conditions involving brightness variations of scene points, due to illumination nonuniformity, light source motion, specular reflection, and/or interreflection. We show that in the application of this method, care must be taken in the estimation of image derivatives using finite difference methods to prevent biases in the solution. We suggest a simple modification to overcome them. Comparison with two other models, including the classical brightness constancy, is made through results from experiments with real images.
| Original language | English |
|---|---|
| Title of host publication | 1993 IEEE 4th International Conference on Computer Vision |
| Place of Publication | Los Alamitos, CA, United States |
| Publisher | Publ by IEEE |
| Pages | 2-11 |
| Number of pages | 10 |
| ISBN (Print) | 0818638729 |
| State | Published - Jan 1 1993 |
| Event | 1993 IEEE 4th International Conference on Computer Vision - Berlin, Ger Duration: May 11 1993 → May 14 1993 |
Other
| Other | 1993 IEEE 4th International Conference on Computer Vision |
|---|---|
| City | Berlin, Ger |
| Period | 5/11/93 → 5/14/93 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
A generalized brightness change model for computing optical flow. / Negahdaripour, Shahriar; Yu, Chih Ho.
1993 IEEE 4th International Conference on Computer Vision. Los Alamitos, CA, United States : Publ by IEEE, 1993. p. 2-11.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - A generalized brightness change model for computing optical flow
AU - Negahdaripour, Shahriar
AU - Yu, Chih Ho
PY - 1993/1/1
Y1 - 1993/1/1
N2 - We propose an image motion constraint equation based on a model which allows the brightness of a scene point to vary with time, unlike the case in the brightness constancy model. Using this model, we describe a method for the computation of optical flow and investigate its performance in a variety of conditions involving brightness variations of scene points, due to illumination nonuniformity, light source motion, specular reflection, and/or interreflection. We show that in the application of this method, care must be taken in the estimation of image derivatives using finite difference methods to prevent biases in the solution. We suggest a simple modification to overcome them. Comparison with two other models, including the classical brightness constancy, is made through results from experiments with real images.
AB - We propose an image motion constraint equation based on a model which allows the brightness of a scene point to vary with time, unlike the case in the brightness constancy model. Using this model, we describe a method for the computation of optical flow and investigate its performance in a variety of conditions involving brightness variations of scene points, due to illumination nonuniformity, light source motion, specular reflection, and/or interreflection. We show that in the application of this method, care must be taken in the estimation of image derivatives using finite difference methods to prevent biases in the solution. We suggest a simple modification to overcome them. Comparison with two other models, including the classical brightness constancy, is made through results from experiments with real images.
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UR - http://www.scopus.com/inward/citedby.url?scp=0027306398&partnerID=8YFLogxK
M3 - Conference contribution
SN - 0818638729
SP - 2
EP - 11
BT - 1993 IEEE 4th International Conference on Computer Vision
PB - Publ by IEEE
CY - Los Alamitos, CA, United States
ER -