updated docs

docs/docs/linear_algebra.xml

@@ -590,6 +590,8 @@
          <item>point_transform</item> 
          <item>point_transform_affine</item> 
          <item>find_affine_transform</item> 
+         <item>point_transform_projective</item> 
+         <item>find_projective_transform</item> 
          <item>rotation_matrix</item> 
          <item>get_rect</item> 
          <item>centered_rect</item> 
@@ -1046,6 +1048,34 @@
                                  
       </component>
 
+   <!-- ************************************************************************* -->
+
+      <component>
+         <name>point_transform_projective</name>
+         <file>dlib/geometry.h</file>
+         <spec_file link="true">dlib/geometry/point_transforms_abstract.h</spec_file>
+         <description>        
+            This is an object that applies a projective transformation to a <a href="#vector">vector</a> or 
+            <a href="#point">point</a>.  Note that you can use <a href="#find_projective_transform">find_projective_transform</a>
+            to easily create projective transforms from sets of point correspondences.
+         </description>
+                                 
+      </component>
+
+   <!-- ************************************************************************* -->
+
+      <component>
+         <name>find_projective_transform</name>
+         <file>dlib/geometry.h</file>
+         <spec_file link="true">dlib/geometry/point_transforms_abstract.h</spec_file>
+         <description>        
+            This is a routine that takes in two sets of points and finds the
+            best <a href="#point_transform_projective">projective transformation</a>
+            that maps between them.
+         </description>
+                                 
+      </component>
+
    <!-- ************************************************************************* -->
 
       <component>

docs/docs/term_index.xml

@@ -212,6 +212,8 @@
          <term file="linear_algebra.html" name="point_transform"           include="dlib/geometry.h"/>
          <term file="linear_algebra.html" name="point_transform_affine"    include="dlib/geometry.h"/>
          <term file="linear_algebra.html" name="find_affine_transform"     include="dlib/geometry.h"/>
+         <term file="linear_algebra.html" name="point_transform_projective"    include="dlib/geometry.h"/>
+         <term file="linear_algebra.html" name="find_projective_transform"     include="dlib/geometry.h"/>
          <term file="linear_algebra.html" name="rotation_matrix"           include="dlib/geometry.h"/>
          <term file="algorithms.html" name="running_stats"                 include="dlib/statistics.h"/>
          <term file="algorithms.html" name="running_scalar_covariance"     include="dlib/statistics.h"/>