diff --git a/build_linux64/libamscppimglib4.linux64.a b/build_linux64/libamscppimglib4.linux64.a
index ba57254..7e5fd13 100644
Binary files a/build_linux64/libamscppimglib4.linux64.a and b/build_linux64/libamscppimglib4.linux64.a differ
diff --git a/build_linux64/objstore/amscppimglib4_amsimage.o b/build_linux64/objstore/amscppimglib4_amsimage.o
index 3e66396..9984e9d 100644
Binary files a/build_linux64/objstore/amscppimglib4_amsimage.o and b/build_linux64/objstore/amscppimglib4_amsimage.o differ
diff --git a/include/amscppimglib4/amscppimglib4.hpp b/include/amscppimglib4/amscppimglib4.hpp
index fe11a03..4cd7638 100644
--- a/include/amscppimglib4/amscppimglib4.hpp
+++ b/include/amscppimglib4/amscppimglib4.hpp
@@ -72,11 +72,12 @@ namespace ams
         void clear();
         void setall(amspixel color);
 
+    
+        amsbitplane get_colorplane(int Ncp);
+        int set_colorplane(int Ncp, const amsbitplane *bp);
+        
         //todo
 
-        int get_colorplane(int Ncp, amsbitplane* bp);
-        int set_colorplane(int Ncp, const amsbitplane* bp);
-        
         //applies image with alpha blending
         int apply_image(int I0, int J0, amsimage *img);
 
diff --git a/src/amscppimglib4/amscppimglib4_amsimage.cpp b/src/amscppimglib4/amscppimglib4_amsimage.cpp
index e02f3a6..c20c290 100644
--- a/src/amscppimglib4/amscppimglib4_amsimage.cpp
+++ b/src/amscppimglib4/amscppimglib4_amsimage.cpp
@@ -583,4 +583,53 @@ namespace ams
         return;
     }
 
+    amsbitplane amsimage::get_colorplane(int Ncp)
+    {
+        amsbitplane ret;
+        int res;
+
+        res = ret.resize(this->Nx,this->Ny);
+        if(res!=amsimage_success)
+        {
+            printf("amsimage::get_colorplane: error: bitplane failed to resize.\n");
+            return ret;
+        }
+
+        if(Ncp<0 || Ncp>=4)
+        {
+            printf("amsimage::get_colorplane: error: %d is outside indices of valid colorplanes [0,4)\n",Ncp);
+            return ret;
+        }
+
+        imglib4::amsimage_plane_copy(
+            ret.data,
+            0,1,ret.Nx,ret.Ny,
+            this->data,Ncp,4,this->Nx,this->Ny,
+            0,0
+        );
+
+        return ret;
+    }
+
+    int amsimage::set_colorplane(int Ncp, const amsbitplane *bp)
+    {
+        int ret = amsimage_success;
+        int res;
+
+        if(Ncp<0 || Ncp>=4)
+        {
+            ret = amsimage_failure;
+            printf("amsimage::set_colorplane: error: %d is outside indices of valid colorplanes [0,4)\n",Ncp);
+            return ret;
+        }
+
+        imglib4::amsimage_plane_copy(
+            this->data, Ncp, 4, this->Nx, this->Ny,
+            bp->data, 0, 1, bp->Nx, bp->Ny,
+            0,0
+        );
+
+        return ret;
+    }
+
 };
\ No newline at end of file