The principles of area based matching, epipolar constraint, edge strength and orientation constraints were introduced into the corresponding process.
系统中融合了基于区域的立体匹配原理，检出的特征定位准确。
2
A set of inequality constraint conditions of the strength parameters is derived from the convexity of the strength criterion, which is expressed in a quadric form in terms of stress components.
The constraint conditions can be used to identify the availability of the strength criterion and they are helpful to measure the basic strength parameters.