diff --git a/src/osg/Image.cpp b/src/osg/Image.cpp
index 90ce0fb58..02e238387 100644
--- a/src/osg/Image.cpp
+++ b/src/osg/Image.cpp
@@ -205,7 +205,7 @@ GLenum Image::computePixelFormat(GLenum format)
         case(GL_LUMINANCE_ALPHA8UI_EXT):
         case(GL_LUMINANCE_ALPHA16UI_EXT):
         case(GL_LUMINANCE_ALPHA32UI_EXT):
-            return GL_LUMINANCE_ALPHA_INTEGER_EXT;;
+            return GL_LUMINANCE_ALPHA_INTEGER_EXT;
         case(GL_RGB32I_EXT):
         case(GL_RGB16I_EXT):
         case(GL_RGB8I_EXT):
@@ -364,6 +364,17 @@ unsigned int Image::computeNumComponents(GLenum pixelFormat)
         case(GL_DSDT_NV): return 2;
         case(GL_DSDT_MAG_NV): return 3;
         case(GL_DSDT_MAG_VIB_NV): return 4;
+        case(GL_RED_INTEGER_EXT): return 1;
+        case(GL_GREEN_INTEGER_EXT): return 1;
+        case(GL_BLUE_INTEGER_EXT): return 1;
+        case(GL_ALPHA_INTEGER_EXT): return 1;
+        case(GL_RGB_INTEGER_EXT): return 3;
+        case(GL_RGBA_INTEGER_EXT): return 4;
+        case(GL_BGR_INTEGER_EXT): return 3;
+        case(GL_BGRA_INTEGER_EXT): return 4;
+        case(GL_LUMINANCE_INTEGER_EXT): return 1;
+        case(GL_LUMINANCE_ALPHA_INTEGER_EXT): return 2;
+
         default:
         {
             notify(WARN)<<"error pixelFormat = "<<std::hex<<pixelFormat<<std::endl;