--- ImageMagick-6.0.8/coders/jp2.c_orig	2004-10-28 12:52:41.000000000 +0200
+++ ImageMagick-6.0.8/coders/jp2.c	2004-10-28 12:53:50.000000000 +0200
@@ -370,6 +370,30 @@
       break;
     }
     case JAS_CLRSPC_FAM_YCBCR:
+    {
+      components[0]=jas_image_getcmptbytype(jp2_image,
+        JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_YCBCR_Y));
+      components[1]=jas_image_getcmptbytype(jp2_image,
+        JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_YCBCR_CB));
+      components[2]=jas_image_getcmptbytype(jp2_image,
+        JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_YCBCR_CR));
+      if ((components[0] < 0) || (components[1] < 0) || (components[2] < 0))
+        {
+          (void) jas_stream_close(jp2_stream);
+          jas_image_destroy(jp2_image);
+          ThrowReaderException(CorruptImageError,"MissingImageChannel");
+        }
+      number_components=3;
+      components[3]=jas_image_getcmptbytype(jp2_image,
+        JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_OPACITY));
+      if (components[3] > 0)
+        {
+          image->matte=MagickTrue;
+          number_components++;
+        }
+      (void) SetImageColorspace(image,YCbCrColorspace);
+      break;
+    }
     default:
     {
       (void) jas_stream_close(jp2_stream);