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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M3 - Conference contribution
AN - SCOPUS:0027306398
SN - 0818638729
T3 - 1993 IEEE 4th International Conference on Computer Vision
SP - 2
EP - 11
BT - 1993 IEEE 4th International Conference on Computer Vision
PB - Publ by IEEE
T2 - 1993 IEEE 4th International Conference on Computer Vision
Y2 - 11 May 1993 through 14 May 1993
ER -