rotation_matrix2D

PURPOSE

Returns the matrix: R=[cos(t) -sin(t); sin(t) cos(t)].

SYNOPSIS

function R = rotation_matrix2D( theta )

DESCRIPTION

 Returns the matrix: R=[cos(t) -sin(t); sin(t) cos(t)].

 y=R*x is the result of rotating x theta degress clockwise about the z-axis.  
 One can retrive the angle of rotation via theta = acos(R(1)).

 INPUTS
   theta   - angle of rotation (radians)

 OUTPUTS
   R       - 2x2 Rotation matrix

 EXAMPLE
   R = rotation_matrix2D( pi/6 )

 DATESTAMP
   29-Sep-2005  2:00pm

 See also ROTATION_MATRIX3D

CROSS-REFERENCE INFORMATION

This function calls:

This function is called by:

imrotate2 Custom version of imrotate that demonstrates use of apply_homography.
jitter_image Creates multiple, slightly jittered versions of an image.