Added missing requirement.

ca30fd76 · Davis King · e30b58a9 · ca30fd76
Commit ca30fd76 authored Sep 08, 2011 by Davis King
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spatial_filtering_abstract.h dlib/image_transforms/spatial_filtering_abstract.h +1 -0

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--- a/dlib/image_transforms/spatial_filtering_abstract.h
+++ b/dlib/image_transforms/spatial_filtering_abstract.h
@@ -73,6 +73,7 @@ namespace dlib
    /*!
        requires
            - in_image_type == is an implementation of array2d/array2d_kernel_abstract.h
+            - pixel_traits<typename in_image_type::type> must be defined 
            - T should be a scalar type
            - shrink_rect(get_rect(img),1).contains(c,r)
            - shrink_rect(get_rect(img),1).contains(c+NC-1,r+NR-1)