BUG: RGB images could not return number of components

Author: cookpa

ants/core/ants_image_io.py

@@ -82,7 +82,10 @@ def from_numpy(
         image direction
 
     has_components : boolean
-        whether the image has components
+        whether the image has vector components.
+
+    is_rgb : boolean
+        whether the image is RGB. This implies has_components=True.
 
     Returns
     -------

src/antsImage.cxx

@@ -108,6 +108,8 @@ void local_antsImage(nb::module_ &m) {
     m.def("getComponents",  &getComponents<itk::VectorImage<double,2>>);
     m.def("getComponents",  &getComponents<itk::VectorImage<double,3>>);
     m.def("getComponents",  &getComponents<itk::VectorImage<double,4>>);
+    m.def("getComponents", &getComponents<itk::Image<itk::RGBPixel<unsigned char>,2>>);
+    m.def("getComponents", &getComponents<itk::Image<itk::RGBPixel<unsigned char>,3>>);
 
     m.def("getShape",  &getShape<itk::Image<unsigned char,2>>);
     m.def("getShape",  &getShape<itk::Image<unsigned char,3>>);