added several near duplicate tests from opj suite, some refactoring

Rewrite of read method tests with area parameter.  They run much faster now.

.gitignore

@@ -1 +1,2 @@
 *.pyc
+*.swp

glymur/jp2k.py

@@ -759,49 +759,99 @@ class Jp2k(Jp2kBox):
 
         return boxes
 
-    def __getitem__(self, *pargs):
+    def __getitem__(self, pargs):
         """
+        Slicing protocol.
         """
-        if isinstance(pargs[0], slice):
+        if re.match("1.", version.openjpeg_version):
+            msg = "Not implemented for version 1.x of OpenJPEG.  Use the read "
+            msg += "method instead."
+            raise NotImplementedError(msg)
+
+        codestream = self.get_codestream(header_only=True)
+        if isinstance(pargs, int):
+            # Not a very good use of this protocol, but technically legal.
+            # This retrieves a single row.
+            row = pargs
+            area = (row, 0, row + 1, codestream.segment[1].xsiz)
+            return self.read(area=area).squeeze()
+
+        if isinstance(pargs, slice):
+            # Case of jp2[:], i.e. retrieve the entire image.
+            #
             # Should have a slice object where start = stop = step = None
-            slc = pargs[0]
+            return self.read()
-            if slc.start is None and slc.stop is None and slc.step is None:
-                return self.read()
-            else:
-                raise IndexError("Illegal syntax.")
 
-        if isinstance(pargs[0], tuple):
+        if isinstance(pargs, tuple) and all(isinstance(x, int) for x in pargs):
-            ridx = pargs[0][0]
+            # Retrieve a single pixel.
-            cidx = pargs[0][1]
+            # Something like jp2[r, c]
+            row = pargs[0]
+            col = pargs[1]
+            area = (row, col, row + 1, col + 1)
+            pixel = self.read(area=area).squeeze()
             
-            if ((ridx.start is not None) or
+            if len(pargs) == 2:
-                    (ridx.stop is not None) or
+                return pixel
-                    (cidx.start is not None) or
+            elif len(pargs) == 3:
-                    (cidx.stop is not None)):
+                return pixel[pargs[2]]
-                msg = "Only strides are supported when slicing a Jp2k object."
-                raise IndexError(msg)
 
-            if ridx.step is None and cidx.step is None:
+        # Assuming pargs is a tuple of slices from now on.  
-                step = 1
+        rows = pargs[0]
-            elif ridx.step != cidx.step:
+        cols = pargs[1]
-                msg = "Row and column strides must be the same."
+        if len(pargs) == 2:
-                raise IndexError(msg)
+            bands = slice(None, None, None)
-            else:
+        else:
-                step = ridx.step
+            bands = pargs[2]
 
-            if np.log2(step) != np.floor(np.log2(step)):
+        if rows.step is None:
-                msg = "Row and column strides must be powers of 2."
+            rows_step = 1
-                raise IndexError(msg)
+        else:
+            rows_step = rows.step
 
-            data = self.read(rlevel=np.int(np.log2(step)))
+        if cols.step is None:
-            if len(pargs[0]) == 2:
+            cols_step = 1
-                return data
+        else:
+            cols_step = cols.step
 
-            # Ok, 3 arguments in pargs.
+        if rows_step != cols_step:
-            if isinstance(pargs[0][2], slice):
+            msg = "Row and column strides must be the same."
-                return data[:,:,pargs[0][2]]
+            raise IndexError(msg)
-            elif isinstance(pargs[0][2], int):
+
-                return data[:,:,pargs[0][2]]
+        # Ok, reduce layer step is the same in both xy directions, so just take
+        # one of them.
+        step = rows_step
+    
+        if np.log2(step) != np.floor(np.log2(step)):
+            msg = "Row and column strides must be powers of 2."
+            raise IndexError(msg)
+
+        if rows.start is None:
+            rows_start = 0
+        else:
+            rows_start = rows.start
+
+        if rows.stop is None:
+            rows_stop = codestream.segment[1].ysiz
+        else:
+            rows_stop = rows.stop
+        
+        if cols.start is None:
+            cols_start = 0
+        else:
+            cols_start = cols.start
+
+        if cols.stop is None:
+            cols_stop = codestream.segment[1].xsiz
+        else:
+            cols_stop = cols.stop
+        
+        area = (rows_start, cols_start, rows_stop, cols_stop)
+        data = self.read(area=area, rlevel=np.int(np.log2(step)))
+        if len(pargs) == 2:
+            return data
+
+        # Ok, 3 arguments in pargs.
+        return data[:, :, bands]
 
 
     def read(self, **kwargs):

glymur/test/test_jp2k.py

@@ -52,6 +52,306 @@ def load_tests(loader, tests, ignore):
     return tests
 
 
+@unittest.skipIf(glymur.version.openjpeg_version[0] == '1',
+                 "Slice protocol not supported in version 1.x")
+class TestSliceProtocol(unittest.TestCase):
+    """
+    Test slice protocol, i.e. when using [ ] to read image data.
+    """
+    @classmethod
+    def setUpClass(self):
+
+        self.jp2 = Jp2k(glymur.data.nemo())
+        self.jp2_data = self.jp2.read()
+
+        self.j2k = Jp2k(glymur.data.goodstuff())
+        self.j2k_data = self.j2k.read()
+
+    def test_resolution_strides_cannot_differ(self):
+        with self.assertRaises(IndexError):
+            # Strides in x/y directions cannot differ.
+            self.j2k[::2, ::3]
+
+    def test_resolution_strides_cannot_differ(self):
+        with self.assertRaises(IndexError):
+            # Strides in x/y directions cannot differ.
+            self.j2k[::2, ::3]
+
+    def test_resolution_strides_must_be_powers_of_two(self):
+        with self.assertRaises(IndexError):
+            self.j2k[::3, ::3]
+
+    def test_integer_index_in_3d(self):
+
+        for j in [0, 1, 2]:
+            band = self.j2k[:, :, j]
+            np.testing.assert_array_equal(self.j2k_data[:, :, j], band)
+
+    def test_slice_in_third_dimension(self):
+        actual = self.j2k[:,:,1:3]
+        expected = self.j2k_data[:,:,1:3]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_reduce_resolution_and_slice_in_third_dimension(self):
+        d = self.j2k[::2, ::2, 1:3]
+        all = self.j2k.read(rlevel=1)
+        np.testing.assert_array_equal(all[:,:,1:3], d)
+
+    def test_retrieve_single_row(self):
+        actual = self.jp2[0]
+        expected = self.jp2_data[0]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_retrieve_single_pixel(self):
+        actual = self.jp2[0,0]
+        expected = self.jp2_data[0, 0]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_retrieve_single_component(self):
+        actual = self.jp2[20,20,2]
+        expected = self.jp2_data[20, 20, 2]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_quarters_upper_left(self):
+        actual = self.jp2[:728, :1296]
+        expected = self.jp2_data[:728, :1296]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_quarters_lower_left(self):
+        actual = self.jp2[728:, :1296]
+        expected = self.jp2_data[728:, :1296]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_quarters_upper_right(self):
+        actual = self.jp2[:728, 1296:]
+        expected = self.jp2_data[:728, 1296:]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_quarters_lower_right(self):
+        actual = self.jp2[728:, 1296:]
+        expected = self.jp2_data[728:, 1296:]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_quarters_center(self):
+        actual = self.jp2[364:1092, 648:1942]
+        expected = self.jp2_data[364:1092, 648:1942]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_halves_left(self):
+        actual = self.jp2[:, :1296]
+        expected = self.jp2_data[:, :1296]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_right_half(self):
+        actual = self.jp2[:, 1296:]
+        expected = self.jp2_data[:, 1296:]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_top_half(self):
+        actual = self.jp2[:728, :]
+        expected = self.jp2_data[:728, :]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_full_resolution_slicing_by_bottom_half(self):
+        actual = self.jp2[728:, :]
+        expected = self.jp2_data[728:, :]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_region_rlevel1(self):
+        actual = self.jp2[0:201:2, 0:201:2]
+        expected = self.jp2.read(area=(0, 0, 201, 201), rlevel=1)
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_region_rlevel1_slice_start_is_none(self):
+        actual = self.jp2[:201:2, :201:2]
+        expected = self.jp2.read(area=(0, 0, 201, 201), rlevel=1)
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_region_rlevel1_slice_stop_is_none(self):
+        actual = self.jp2[201::2, 201::2]
+        expected = self.jp2.read(area=(201, 201, 1456, 2592), rlevel=1)
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_region_rlevel1(self):
+        actual = self.jp2[0:202:2, 0:202:2]
+        expected = self.jp2.read(area=(0, 0, 202, 202), rlevel=1)
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_slice_protocol_2d_reduce_resolution(self):
+        d = self.j2k[:]
+        self.assertEqual(d.shape, (800, 480, 3))
+
+        d = self.j2k[::1, ::1]
+        self.assertEqual(d.shape, (800, 480, 3))
+
+        d = self.j2k[::2, ::2]
+        self.assertEqual(d.shape, (400, 240, 3))
+
+        d = self.j2k[::4, ::4]
+        self.assertEqual(d.shape, (200, 120, 3))
+
+        d = self.j2k[::8, ::8]
+        self.assertEqual(d.shape, (100, 60, 3))
+
+        d = self.j2k[::16, ::16]
+        self.assertEqual(d.shape, (50, 30, 3))
+
+        d = self.j2k[::32, ::32]
+        self.assertEqual(d.shape, (25, 15, 3))
+
+@unittest.skipIf(OPJ_DATA_ROOT is None,
+                 "OPJ_DATA_ROOT environment variable not set")
+@unittest.skipIf(glymur.version.openjpeg_version[0] == '1',
+                 "Slice protocol not supported in version 1.x")
+class TestSliceProtocolOpjData(unittest.TestCase):
+    """
+    Test slice protocol, i.e. when using [ ] to read image data.
+    These correspond to tests for the read method with the area parameter.
+    """
+    @classmethod
+    def setUpClass(self):
+
+        jfile = opj_data_file('input/conformance/p1_04.j2k')
+        self.j2k = Jp2k(jfile)
+        self.j2k_data = self.j2k.read()
+        self.j2k_half_data = self.j2k.read(rlevel=1)
+        self.j2k_quarter_data = self.j2k.read(rlevel=2)
+
+    def test_NR_DEC_p1_04_j2k_43_decode(self):
+        actual = self.j2k[:1024, :1024]
+        expected = self.j2k_data
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_44_decode(self):
+        actual = self.j2k[640:768, 512:640]
+        expected = self.j2k_data[640:768, 512:640]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_45_decode(self):
+        actual = self.j2k[896:1024, 896:1024]
+        expected = self.j2k_data[896:1024, 896:1024]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_46_decode(self):
+        actual = self.j2k[500:800, 100:300]
+        expected = self.j2k_data[500:800, 100:300]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_47_decode(self):
+        actual = self.j2k[520:600, 260:360]
+        expected = self.j2k_data[520:600, 260:360]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_48_decode(self):
+        actual = self.j2k[520:660, 260:360]
+        expected = self.j2k_data[520:660, 260:360]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_49_decode(self):
+        actual = self.j2k[520:600, 360:400]
+        expected = self.j2k_data[520:600, 360:400]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_50_decode(self):
+        actual = self.j2k[:1024:4, :1024:4]
+        expected = self.j2k_quarter_data[:256, :256]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_51_decode(self):
+        actual = self.j2k[640:768:4, 512:640:4]
+        expected = self.j2k_quarter_data[160:192, 128:160]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_52_decode(self):
+        actual = self.j2k[896:1024:4, 896:1024:4]
+        expected = self.j2k_quarter_data[224:352, 224:352]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_53_decode(self):
+        actual = self.j2k[500:800:4, 100:300:4]
+        expected = self.j2k_quarter_data[125:200, 25:75]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_54_decode(self):
+        actual = self.j2k[520:600:4, 260:360:4]
+        expected = self.j2k_quarter_data[130:150, 65:90]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_55_decode(self):
+        actual = self.j2k[520:660:4, 260:360:4]
+        expected = self.j2k_quarter_data[130:165, 65:90]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_56_decode(self):
+        actual = self.j2k[520:600:4, 360:400:4]
+        expected = self.j2k_quarter_data[130:150, 90:100]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_06_j2k_75_decode(self):
+        # Image size would be 0 x 0.
+        with self.assertRaises((IOError, OSError)):
+            self.j2k[9:12:4, 9:12:4]
+
+    def test_NR_DEC_p0_04_j2k_85_decode(self):
+        actual = self.j2k[:256, :256]
+        expected = self.j2k_data[:256, :256]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_86_decode(self):
+        actual = self.j2k[:128, 128:256]
+        expected = self.j2k_data[:128, 128:256]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_87_decode(self):
+        actual = self.j2k[10:200, 50:120]
+        expected = self.j2k_data[10:200, 50:120]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_88_decode(self):
+        actual = self.j2k[150:210, 10:190]
+        expected = self.j2k_data[150:210, 10:190]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_89_decode(self):
+        actual = self.j2k[80:150, 100:200]
+        expected = self.j2k_data[80:150, 100:200]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_90_decode(self):
+        actual = self.j2k[20:50, 150:200]
+        expected = self.j2k_data[20:50, 150:200]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_91_decode(self):
+        actual = self.j2k[:256:4, :256:4]
+        expected = self.j2k_quarter_data[0:64, 0:64]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_92_decode(self):
+        actual = self.j2k[:128:4, 128:256:4]
+        expected = self.j2k_quarter_data[:32, 32:64]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_93_decode(self):
+        actual = self.j2k[10:200:4, 50:120:4]
+        expected = self.j2k_quarter_data[3:50, 13:30]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_94_decode(self):
+        actual = self.j2k[150:210:4, 10:190:4]
+        expected = self.j2k_quarter_data[38:53, 3:48]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_95_decode(self):
+        actual = self.j2k[80:150:4, 100:200:4]
+        expected = self.j2k_quarter_data[20:38, 25:50]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p0_04_j2k_96_decode(self):
+        actual = self.j2k[20:50:4, 150:200:4]
+        expected = self.j2k_quarter_data[5:13, 38:50]
+        np.testing.assert_array_equal(actual, expected)
+
 class TestJp2k(unittest.TestCase):
     """These tests should be run by just about all configuration."""
 
@@ -63,77 +363,6 @@ class TestJp2k(unittest.TestCase):
     def tearDown(self):
         pass
 
-    def test_slice_protocol_negative(self):
-        """
-        """
-        j = Jp2k(self.j2kfile)
-
-        with self.assertRaises(IndexError):
-            # Strides in x/y directions cannot differ.
-            d = j[::2, ::3]
-
-        with self.assertRaises(IndexError):
-            # Strides in x/y direction must be powers of 2.
-            d = j[::3, ::3]
-
-        # start and stop are not supported when slicing on Jp2k object
-        with self.assertRaises(IndexError):
-            d = j[2::2, 2::2]
-        with self.assertRaises(IndexError):
-            d = j[:8:2, :8:2]
-        with self.assertRaises(IndexError):
-            d = j[2:8:2, 2:8:2]
-
-    def test_slice_protocol_3d(self):
-        """
-        """
-        j = Jp2k(self.j2kfile)
-        all = j.read()
-
-        d = j[:,:,0]
-        np.testing.assert_array_equal(all[:,:,0], d)
-
-        d = j[:,:,1]
-        np.testing.assert_array_equal(all[:,:,1], d)
-
-        d = j[:,:,2]
-        np.testing.assert_array_equal(all[:,:,2], d)
-
-        d = j[:,:,1:3]
-        np.testing.assert_array_equal(all[:,:,1:3], d)
-
-        d = j[::2, ::2, 1:3]
-        all = j.read(rlevel=1)
-        np.testing.assert_array_equal(all[:,:,1:3], d)
-
-    def test_slice_protocol_2d(self):
-        """
-
-        """
-        j = Jp2k(self.j2kfile)
-
-        d = j[:]
-        self.assertEqual(d.shape, (800, 480, 3))
-
-        # Stride of one.
-        d = j[::1, ::1]
-        self.assertEqual(d.shape, (800, 480, 3))
-
-        # Stride of 2.
-        d = j[::2, ::2]
-        self.assertEqual(d.shape, (400, 240, 3))
-
-        d = j[::4, ::4]
-        self.assertEqual(d.shape, (200, 120, 3))
-
-        d = j[::8, ::8]
-        self.assertEqual(d.shape, (100, 60, 3))
-
-        d = j[::16, ::16]
-        self.assertEqual(d.shape, (50, 30, 3))
-
-        d = j[::32, ::32]
-        self.assertEqual(d.shape, (25, 15, 3))
 
     @unittest.skipIf(os.name == "nt", "Unexplained failure on windows")
     def test_irreversible(self):

glymur/test/test_opj_suite_2p1.py

@@ -124,105 +124,6 @@ class TestSuite2point1(unittest.TestCase):
         Jp2k(jfile).read()
         self.assertTrue(True)
 
-    def test_NR_DEC_p1_04_j2k_43_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(0, 0, 1024, 1024))
-        odata = jp2k.read()
-        np.testing.assert_array_equal(ssdata, odata)
-
-    def test_NR_DEC_p1_04_j2k_44_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(640, 512, 768, 640))
-        odata = jp2k.read()
-        np.testing.assert_array_equal(ssdata, odata[640:768, 512:640])
-
-    def test_NR_DEC_p1_04_j2k_45_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(896, 896, 1024, 1024))
-        odata = jp2k.read()
-        np.testing.assert_array_equal(ssdata, odata[896:1024, 896:1024])
-
-    def test_NR_DEC_p1_04_j2k_46_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(500, 100, 800, 300))
-        odata = jp2k.read()
-        np.testing.assert_array_equal(ssdata, odata[500:800, 100:300])
-
-    def test_NR_DEC_p1_04_j2k_47_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(520, 260, 600, 360))
-        odata = jp2k.read()
-        np.testing.assert_array_equal(ssdata, odata[520:600, 260:360])
-
-    def test_NR_DEC_p1_04_j2k_48_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(520, 260, 660, 360))
-        odata = jp2k.read()
-        np.testing.assert_array_equal(ssdata, odata[520:660, 260:360])
-
-    def test_NR_DEC_p1_04_j2k_49_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(520, 360, 600, 400))
-        odata = jp2k.read()
-        np.testing.assert_array_equal(ssdata, odata[520:600, 360:400])
-
-    def test_NR_DEC_p1_04_j2k_50_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(0, 0, 1024, 1024), rlevel=2)
-        odata = jp2k.read(rlevel=2)
-
-        np.testing.assert_array_equal(ssdata, odata[0:256, 0:256])
-
-    def test_NR_DEC_p1_04_j2k_51_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(640, 512, 768, 640), rlevel=2)
-        odata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(ssdata, odata[160:192, 128:160])
-
-    def test_NR_DEC_p1_04_j2k_52_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(896, 896, 1024, 1024), rlevel=2)
-        odata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(ssdata, odata[224:352, 224:352])
-
-    def test_NR_DEC_p1_04_j2k_53_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(500, 100, 800, 300), rlevel=2)
-        odata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(ssdata, odata[125:200, 25:75])
-
-    def test_NR_DEC_p1_04_j2k_54_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(520, 260, 600, 360), rlevel=2)
-        odata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(ssdata, odata[130:150, 65:90])
-
-    def test_NR_DEC_p1_04_j2k_55_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(520, 260, 660, 360), rlevel=2)
-        odata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(ssdata, odata[130:165, 65:90])
-
-    def test_NR_DEC_p1_04_j2k_56_decode(self):
-        jfile = opj_data_file('input/conformance/p1_04.j2k')
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(520, 360, 600, 400), rlevel=2)
-        odata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(ssdata, odata[130:150, 90:100])
-
     def test_NR_DEC_p1_04_j2k_57_decode(self):
         jfile = opj_data_file('input/conformance/p1_04.j2k')
         jp2k = Jp2k(jfile)
@@ -263,127 +164,180 @@ class TestSuite2point1(unittest.TestCase):
             with self.assertRaises(IOError):
                 j.read()
 
-    def test_NR_DEC_p1_06_j2k_70_decode(self):
+@unittest.skipIf(OPJ_DATA_ROOT is None,
+                 "OPJ_DATA_ROOT environment variable not set")
+@unittest.skipIf(re.match(r'''(1|2.0.0)''',
+                          glymur.version.openjpeg_version) is not None,
+                 "Only supported in 2.0.1 or higher")
+class TestReadArea(unittest.TestCase):
+    """
+    Runs tests introduced in version 2.0+ or that pass only in 2.0+
+    
+    Specifically for read method with area parameter.
+    """
+    @classmethod
+    def setUpClass(self):
+
+        jfile = opj_data_file('input/conformance/p1_04.j2k')
+        self.j2k = Jp2k(jfile)
+        self.j2k_data = self.j2k.read()
+        self.j2k_half_data = self.j2k.read(rlevel=1)
+        self.j2k_quarter_data = self.j2k.read(rlevel=2)
+
         jfile = opj_data_file('input/conformance/p1_06.j2k')
-        jp2k = Jp2k(jfile)
+        self.j2k_p1_06 = Jp2k(jfile)
-        ssdata = jp2k.read(area=(9, 9, 12, 12), rlevel=1)
+
-        self.assertEqual(ssdata.shape, (1, 1, 3))
+    def test_NR_DEC_p1_04_j2k_43_decode(self):
+        actual = self.j2k.read(area=(0, 0, 1024, 1024))
+        expected = self.j2k_data
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_44_decode(self):
+        actual = self.j2k.read(area=(640, 512, 768, 640))
+        expected = self.j2k_data[640:768, 512:640]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_45_decode(self):
+        actual = self.j2k.read(area=(896, 896, 1024, 1024))
+        expected = self.j2k_data[896:1024, 896:1024]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_46_decode(self):
+        actual = self.j2k.read(area=(500, 100, 800, 300))
+        expected = self.j2k_data[500:800, 100:300]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_47_decode(self):
+        actual = self.j2k.read(area=(520, 260, 600, 360))
+        expected = self.j2k_data[520:600, 260:360]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_48_decode(self):
+        actual = self.j2k.read(area=(520, 260, 660, 360))
+        expected = self.j2k_data[520:660, 260:360]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_49_decode(self):
+        actual = self.j2k.read(area=(520, 360, 600, 400))
+        expected = self.j2k_data[520:600, 360:400]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_50_decode(self):
+        actual = self.j2k.read(area=(0, 0, 1024, 1024), rlevel=2)
+        expected = self.j2k_quarter_data
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_51_decode(self):
+        actual = self.j2k.read(area=(640, 512, 768, 640), rlevel=2)
+        expected = self.j2k_quarter_data[160:192, 128:160]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_52_decode(self):
+        actual = self.j2k.read(area=(896, 896, 1024, 1024), rlevel=2)
+        expected = self.j2k_quarter_data[224:352, 224:352]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_53_decode(self):
+        actual = self.j2k.read(area=(500, 100, 800, 300), rlevel=2)
+        expected = self.j2k_quarter_data[125:200, 25:75]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_54_decode(self):
+        actual = self.j2k.read(area=(520, 260, 600, 360), rlevel=2)
+        expected = self.j2k_quarter_data[130:150, 65:90]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_55_decode(self):
+        actual = self.j2k.read(area=(520, 260, 660, 360), rlevel=2)
+        expected = self.j2k_quarter_data[130:165, 65:90]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_04_j2k_56_decode(self):
+        actual = self.j2k.read(area=(520, 360, 600, 400), rlevel=2)
+        expected = self.j2k_quarter_data[130:150, 90:100]
+        np.testing.assert_array_equal(actual, expected)
+
+    def test_NR_DEC_p1_06_j2k_70_decode(self):
+        actual = self.j2k_p1_06.read(area=(9, 9, 12, 12), rlevel=1)
+        self.assertEqual(actual.shape, (1, 1, 3))
 
     def test_NR_DEC_p1_06_j2k_71_decode(self):
-        jfile = opj_data_file('input/conformance/p1_06.j2k')
+        actual = self.j2k_p1_06.read(area=(10, 4, 12, 10), rlevel=1)
-        jp2k = Jp2k(jfile)
+        self.assertEqual(actual.shape, (1, 3, 3))
-        ssdata = jp2k.read(area=(10, 4, 12, 10), rlevel=1)
-        self.assertEqual(ssdata.shape, (1, 3, 3))
 
     def test_NR_DEC_p1_06_j2k_72_decode(self):
-        jfile = opj_data_file('input/conformance/p1_06.j2k')
+        ssdata = self.j2k_p1_06.read(area=(3, 3, 9, 9), rlevel=1)
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(3, 3, 9, 9), rlevel=1)
         self.assertEqual(ssdata.shape, (3, 3, 3))
 
     def test_NR_DEC_p1_06_j2k_73_decode(self):
-        jfile = opj_data_file('input/conformance/p1_06.j2k')
+        ssdata = self.j2k_p1_06.read(area=(4, 4, 7, 7), rlevel=1)
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(4, 4, 7, 7), rlevel=1)
         self.assertEqual(ssdata.shape, (2, 2, 3))
 
     def test_NR_DEC_p1_06_j2k_74_decode(self):
-        jfile = opj_data_file('input/conformance/p1_06.j2k')
+        ssdata = self.j2k_p1_06.read(area=(4, 4, 5, 5), rlevel=1)
-        jp2k = Jp2k(jfile)
-        ssdata = jp2k.read(area=(4, 4, 5, 5), rlevel=1)
         self.assertEqual(ssdata.shape, (1, 1, 3))
 
     def test_NR_DEC_p1_06_j2k_75_decode(self):
         # Image size would be 0 x 0.
-        jfile = opj_data_file('input/conformance/p1_06.j2k')
-        jp2k = Jp2k(jfile)
         with self.assertRaises((IOError, OSError)):
-            jp2k.read(area=(9, 9, 12, 12), rlevel=2)
+            self.j2k_p1_06.read(area=(9, 9, 12, 12), rlevel=2)
 
     def test_NR_DEC_p0_04_j2k_85_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(0, 0, 256, 256))
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_data[:256, :256]
-        ssdata = jp2k.read(area=(0, 0, 256, 256))
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read()
-        np.testing.assert_array_equal(fulldata[0:256, 0:256], ssdata)
 
     def test_NR_DEC_p0_04_j2k_86_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(0, 128, 128, 256))
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_data[:128, 128:256]
-        ssdata = jp2k.read(area=(0, 128, 128, 256))
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read()
-        np.testing.assert_array_equal(fulldata[0:128, 128:256], ssdata)
 
     def test_NR_DEC_p0_04_j2k_87_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(10, 50, 200, 120))
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_data[10:200, 50:120]
-        ssdata = jp2k.read(area=(10, 50, 200, 120))
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read()
-        np.testing.assert_array_equal(fulldata[10:200, 50:120], ssdata)
 
     def test_NR_DEC_p0_04_j2k_88_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(150, 10, 210, 190))
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_data[150:210, 10:190]
-        ssdata = jp2k.read(area=(150, 10, 210, 190))
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read()
-        np.testing.assert_array_equal(fulldata[150:210, 10:190], ssdata)
 
     def test_NR_DEC_p0_04_j2k_89_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(80, 100, 150, 200))
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_data[80:150, 100:200]
-        ssdata = jp2k.read(area=(80, 100, 150, 200))
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read()
-        np.testing.assert_array_equal(fulldata[80:150, 100:200], ssdata)
 
     def test_NR_DEC_p0_04_j2k_90_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(20, 150, 50, 200))
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_data[20:50, 150:200]
-        ssdata = jp2k.read(area=(20, 150, 50, 200))
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read()
-        np.testing.assert_array_equal(fulldata[20:50, 150:200], ssdata)
 
     def test_NR_DEC_p0_04_j2k_91_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(0, 0, 256, 256), rlevel=2)
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_quarter_data[0:64, 0:64]
-        ssdata = jp2k.read(area=(0, 0, 256, 256), rlevel=2)
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(fulldata[0:64, 0:64], ssdata)
 
     def test_NR_DEC_p0_04_j2k_92_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(0, 128, 128, 256), rlevel=2)
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_quarter_data[:32, 32:64]
-        ssdata = jp2k.read(area=(0, 128, 128, 256), rlevel=2)
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(fulldata[0:32, 32:64], ssdata)
 
     def test_NR_DEC_p0_04_j2k_93_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(10, 50, 200, 120), rlevel=2)
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_quarter_data[3:50, 13:30]
-        ssdata = jp2k.read(area=(10, 50, 200, 120), rlevel=2)
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(fulldata[3:50, 13:30], ssdata)
 
     def test_NR_DEC_p0_04_j2k_94_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(150, 10, 210, 190), rlevel=2)
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_quarter_data[38:53, 3:48]
-        ssdata = jp2k.read(area=(150, 10, 210, 190), rlevel=2)
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(fulldata[38:53, 3:48], ssdata)
 
     def test_NR_DEC_p0_04_j2k_95_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(80, 100, 150, 200), rlevel=2)
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_quarter_data[20:38, 25:50]
-        ssdata = jp2k.read(area=(80, 100, 150, 200), rlevel=2)
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(fulldata[20:38, 25:50], ssdata)
 
     def test_NR_DEC_p0_04_j2k_96_decode(self):
-        jfile = opj_data_file('input/conformance/p0_04.j2k')
+        actual = self.j2k.read(area=(20, 150, 50, 200), rlevel=2)
-        jp2k = Jp2k(jfile)
+        expected = self.j2k_quarter_data[5:13, 38:50]
-        ssdata = jp2k.read(area=(20, 150, 50, 200), rlevel=2)
+        np.testing.assert_array_equal(actual, expected)
-        fulldata = jp2k.read(rlevel=2)
-        np.testing.assert_array_equal(fulldata[5:13, 38:50], ssdata)
-
-
-if __name__ == "__main__":
-    unittest.main()