diff --git a/docs/docs/imaging.xml b/docs/docs/imaging.xml
index cb69f72f0..d4689ce75 100644
--- a/docs/docs/imaging.xml
+++ b/docs/docs/imaging.xml
@@ -81,6 +81,8 @@
          <name>Object Detection</name>
          <item>object_detector</item>
          <item>scan_image</item>
+         <item>scan_image_movable_parts</item>
+         <item>find_points_above_thresh</item>
          <item>scan_image_pyramid</item>
          <item>test_box_overlap</item>
          <item nolink="true">
@@ -156,6 +158,7 @@
          <item>separable_3x3_filter_block_grayscale</item> 
          <item>separable_3x3_filter_block_rgb</item> 
          <item>sum_filter</item> 
+         <item>sum_filter_assign</item> 
          <item>max_filter</item> 
          <item>spatially_filter_image_separable_down</item> 
       </section>
@@ -1131,6 +1134,19 @@
          <name>sum_filter</name>
          <file>dlib/image_transforms.h</file>
          <spec_file link="true">dlib/image_transforms/spatial_filtering_abstract.h</spec_file>
+         <description>        
+            This function slides a rectangle over an input image and adds the sum
+            of pixel values in each rectangle location to another image.
+         </description>
+                                 
+      </component>
+            
+   <!-- ************************************************************************* -->
+      
+      <component>
+         <name>sum_filter_assign</name>
+         <file>dlib/image_transforms.h</file>
+         <spec_file link="true">dlib/image_transforms/spatial_filtering_abstract.h</spec_file>
          <description>        
             This function slides a rectangle over an input image and outputs a new 
             image which contains the sum of pixels inside the rectangle at each
@@ -1510,6 +1526,38 @@
                                  
       </component>
             
+   <!-- ************************************************************************* -->
+
+      <component>
+         <name>scan_image_movable_parts</name>
+         <file>dlib/image_processing.h</file>
+         <spec_file link="true">dlib/image_processing/scan_image_abstract.h</spec_file>
+         <description>        
+            This global function is a tool for sliding a set of rectangles
+            over an image space and finding the locations where the sum of pixels in
+            the rectangles exceeds a threshold.  It is useful for implementing
+            certain kinds of sliding window classifiers.  The behavior of this
+            routine is similar to <a href="#scan_image">scan_image</a> except that
+            it can also handle movable parts in addition to rigidly placed parts
+            within the sliding window.
+         </description>
+                                 
+      </component>
+            
+   <!-- ************************************************************************* -->
+
+      <component>
+         <name>find_points_above_thresh</name>
+         <file>dlib/image_processing.h</file>
+         <spec_file link="true">dlib/image_processing/scan_image_abstract.h</spec_file>
+         <description>        
+            This routine finds all points in an image with a pixel value above a
+            threshold.  It also has the ability to produce an efficient random
+            subsample of such points if the number of them is very large.
+         </description>
+                                 
+      </component>
+            
    <!-- ************************************************************************* -->
 
       <component>
diff --git a/docs/docs/term_index.xml b/docs/docs/term_index.xml
index e9d29df34..668def954 100644
--- a/docs/docs/term_index.xml
+++ b/docs/docs/term_index.xml
@@ -1094,6 +1094,7 @@
          <term file="imaging.html" name="gaussian_blur"/>
          <term file="imaging.html" name="spatially_filter_image"/>
          <term file="imaging.html" name="sum_filter"/>
+         <term file="imaging.html" name="sum_filter_assign"/>
          <term file="imaging.html" name="max_filter"/>
          <term file="imaging.html" name="spatially_filter_image_separable"/>
          <term file="imaging.html" name="spatially_filter_image_separable_down"/>
@@ -1141,6 +1142,10 @@
 
          <term file="imaging.html" name="test_box_overlap"/>
          <term file="imaging.html" name="object_detector"/>
+
+         <term file="imaging.html" name="scan_image_movable_parts"/>
+         <term file="imaging.html" name="find_points_above_thresh"/>
+
          <term file="imaging.html" name="scan_image"/>
          <term file="imaging.html" name="scan_image_pyramid"/>
          <term file="imaging.html" name="compute_box_dimensions"/>
@@ -1153,6 +1158,7 @@
          <term file="imaging.html" name="setup_hashed_features"/>
          <term file="dlib/image_processing/scan_image_abstract.h.html" name="all_images_same_size"/>
          <term file="dlib/image_processing/scan_image_abstract.h.html" name="sum_of_rects_in_images"/>
+         <term file="dlib/image_processing/scan_image_abstract.h.html" name="sum_of_rects_in_images_movable_parts"/>
          <term file="dlib/image_processing/box_overlap_testing_abstract.h.html" name="find_tight_overlap_tester"/>
          <term file="dlib/image_processing/scan_image_pyramid_tools_abstract.h.html" name="image_hash_construction_failure"/>