diff --git a/glymur/jp2k.py b/glymur/jp2k.py
index adba2cc..2845cf3 100644
--- a/glymur/jp2k.py
+++ b/glymur/jp2k.py
@@ -138,7 +138,7 @@ class Jp2k(Jp2kBox):
             f.seek(0)
             self.box = self._parse_superbox(f)
 
-    def write(self, data, cratios=None, eph=False, psnr=None, numres=None,
+    def write(self, img_array, cratios=None, eph=False, psnr=None, numres=None,
               cbsize=None, psizes=None, grid_offset=None, sop=False,
               subsam=None, tilesize=None, prog=None, modesw=None,
               colorspace=None, verbose=False):
@@ -150,7 +150,7 @@ class Jp2k(Jp2kBox):
 
         Parameters
         ----------
-        data : array
+        img_array : ndarray
             Image data to be written to file.
         callbacks : bool, optional
             If true, enable default info handler such that INFO messages
@@ -307,19 +307,19 @@ class Jp2k(Jp2kBox):
             msg = "Cannot specify cratios and psnr together."
             raise RuntimeError(msg)
 
-        if data.ndim == 2:
-            numrows, numcols = data.shape
-            data = data.reshape(numrows, numcols, 1)
-        elif data.ndim == 3:
+        if img_array.ndim == 2:
+            numrows, numcols = img_array.shape
+            img_array = img_array.reshape(numrows, numcols, 1)
+        elif img_array.ndim == 3:
             pass
         else:
-            msg = "{0}D imagery is not allowed.".format(data.ndim)
+            msg = "{0}D imagery is not allowed.".format(img_array.ndim)
             raise IOError(msg)
 
-        numrows, numcols, num_comps = data.shape
+        numrows, numcols, num_comps = img_array.shape
 
         if colorspace is None:
-            if data.shape[2] == 1 or data.shape[2] == 2:
+            if img_array.shape[2] == 1 or img_array.shape[2] == 2:
                 colorspace = opj2._CLRSPC_GRAY
             else:
                 # No YCC unless specifically told to do so.
@@ -331,15 +331,15 @@ class Jp2k(Jp2kBox):
             if colorspace not in ('rgb', 'grey', 'gray'):
                 msg = 'Invalid colorspace "{0}"'.format(colorspace)
                 raise IOError(msg)
-            elif colorspace == 'rgb' and data.shape[2] < 3:
+            elif colorspace == 'rgb' and img_array.shape[2] < 3:
                 msg = 'RGB colorspace requires at least 3 components.'
                 raise IOError(msg)
             else:
                 colorspace = _cspace_map[colorspace]
 
-        if data.dtype == np.uint8:
+        if img_array.dtype == np.uint8:
             comp_prec = 8
-        elif data.dtype == np.uint16:
+        elif img_array.dtype == np.uint16:
             comp_prec = 16
         else:
             raise RuntimeError("unhandled datatype")
@@ -368,7 +368,7 @@ class Jp2k(Jp2kBox):
 
         # Stage the image data to the openjpeg data structure.
         for k in range(0, num_comps):
-            layer = np.ascontiguousarray(data[:, :, k], dtype=np.int32)
+            layer = np.ascontiguousarray(img_array[:, :, k], dtype=np.int32)
             dest = image.contents.comps[k].data
             src = layer.ctypes.data
             ctypes.memmove(dest, src, layer.nbytes)
@@ -419,7 +419,7 @@ class Jp2k(Jp2kBox):
 
         Returns
         -------
-        result : array
+        img_array : ndarray
             The image data.
 
         Raises
@@ -451,18 +451,18 @@ class Jp2k(Jp2kBox):
             msg = "Components must all have the same subsampling factors."
             raise IOError(msg)
 
-        data = self._read_common(reduce=reduce,
-                                 layer=layer,
-                                 area=area,
-                                 tile=tile,
-                                 verbose=verbose,
-                                 as_bands=False)
+        img_array = self._read_common(reduce=reduce,
+                                      layer=layer,
+                                      area=area,
+                                      tile=tile,
+                                      verbose=verbose,
+                                      as_bands=False)
 
-        if data.shape[2] == 1:
-            data = data.view()
-            data.shape = data.shape[0:2]
+        if img_array.shape[2] == 1:
+            img_array = img_array.view()
+            img_array.shape = img_array.shape[0:2]
 
-        return data
+        return img_array
 
     def _read_common(self, reduce=0, layer=0, area=None, tile=None,
                      verbose=False, as_bands=False):
@@ -486,7 +486,7 @@ class Jp2k(Jp2kBox):
 
         Returns
         -------
-        data : list or array
+        img_array : ndarray
             The individual image components or a single array.
         """
         dparam = opj2._set_default_decoder_parameters()