rigid transformation is for same modality(CT-CT) nad it can only perform translation, rotation and scaling translation. whereas non rigid for multimodality and it can do streching and shriking too. it use demon algorithm .
Rigid is immovable, unbending. Semi-rigid can move in a limited way.
In 2 dimensional space it is a translation vector which is a 2x1 column vector.
no they are not rigid.
Yes, it is non-rigid.
Movement of a shape can involve flexing - for example, a square frame being flexed into a rhombus. Rigid motion excludes such motion: the shape of the moving object does not change.
dilation (APEX)
Stretch
The key difference between a particle and a rigid body is that a particle can undergo only translational motion whereas a rigid body can undergo both translational and rotational motion
rigid transformation is for same modality(CT-CT) nad it can only perform translation, rotation and scaling translation. whereas non rigid for multimodality and it can do streching and shriking too. it use demon algorithm .
Rigid motion
A rigid link is: a joint between Structural members which does not permit relative motion between them.
Planets
( t = I a ) Rotational motion and centripetal acceleration. This is defined by its equations of motion.
Edward Washington Suppiger has written: 'An analysis of the motion of a rigid body' -- subject(s): Dynamics, Rigid, Rigid Dynamics
Translation, rotation and curvilinear motion
Translation, rotation and curvilinear motion