CVG ready

CrossValidationGenerator.py

@@ -51,8 +51,47 @@ class CVG_legacy:
 
 class APsCVG:
     """Cross Validation Generator for Attribute Profiles Descriptors"""
-    def __init__(self, ground_truth, attributes, cv_count=5, label_ignore=None):
-        d
+    def __init__(self, ground_truth, attributes, n_test=5, label_ignore=None):
+        self._gt = ground_truth
+        self._att = attributes
+        self._cv_count = n_test
+        self._actual_count = 0
         
+        if attributes.shape[0] != ground_truth.shape[0] or \
+           attributes.shape[1] != ground_truth.shape[1] :
+                raise ValueError('attributes and ground_truth must have the same 2D shape')
+        
+    def __iter__(self):
+        return self
+    
+    def __next__(self):
+        if self._cv_count == self._actual_count:
+            raise StopIteration
+        
+        split_map = semantic_cvg(self._gt, self._cv_count, self._actual_count)
+        xtrain = self._att[split_map == 1].reshape(-1, self._att.shape[2])
+        xtest  = self._att[split_map == 2].reshape(-1, self._att.shape[2])
+        ytrain = self._gt[split_map == 1].reshape(-1)
+        ytest  = self._gt[split_map == 2].reshape(-1)
+        test_index = split_map == 2
+        
+        self._actual_count += 1
        
         return xtrain, xtest, ytrain, ytest, test_index
+    
+def semantic_cvg(gt, nb_split, step=0):
+    count = np.unique(gt, return_counts=True)
+
+    test_part = 1 / nb_split
+
+    split = np.zeros_like(gt)
+
+    for lbli, lblc in zip(count[0][1:], count[1][1:]):
+        treshold = int(lblc * test_part)
+        #print('lbli:{}, count:{}, train:{}'.format(lbli, lblc, treshold))
+        f = np.nonzero(gt == lbli)
+        t_int, t_ext = treshold * step, treshold * (step + 1)
+        split[f[0], f[1]] = 1
+        split[f[0][t_int:t_ext], f[1][t_int:t_ext]] = 2
+
+    return split

Notebooks/Attribute Profiles Classifier.ipynb

@@ -77,7 +77,7 @@
     "    '../Data/phase1_rasters/Intensity_C3/UH17_GI3F051_TR.tif',\n",
     "    #'../Data/ground_truth/2018_IEEE_GRSS_DFC_GT_TR.tif',\n",
     "    #'../Res/HVR/C123_num_returns_0_5_nearest.tif',\n",
-    "    #'../Res/HVR noisy/C123_num_returns_0_5_nearest.tif'\n",
+    "    '../Res/HVR noisy/C123_num_returns_0_5_nearest.tif'\n",
     "\n",
     "]"
    ]

Notebooks/Cross Validation Generator.ipynb

@@ -79,7 +79,34 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from CrossValidationGenerator import CVG"
+    "import sys\n",
+    "sys.path.append('..')\n",
+    "from CrossValidationGenerator import APsCVG\n",
+    "sys.path.append('../triskele/python')\n",
+    "import triskele"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "gt = triskele.read('../Data/ground_truth/2018_IEEE_GRSS_DFC_GT_TR.tif')\n",
+    "att = np.array((gt, gt))\n",
+    "att = np.moveaxis(att, 0, 2)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "for xt, xv, yt, yv, ti in APsCVG(gt, att, 2):\n",
+    "    print(xt.shape, yt.shape, xv.shape, yv.shape)\n",
+    "    plt.imshow(ti * 1.)\n",
+    "    plt.show()"
    ]
   }
  ],

Notebooks/DFC2018 Ground truth split train and validation.ipynb

@@ -13,7 +13,7 @@
     "# Triskele\n",
     "import sys\n",
     "from pathlib import Path\n",
-    "triskele_path = Path('../triskele')\n",
+    "triskele_path = Path('../triskele/python')\n",
     "sys.path.append(str(triskele_path.resolve()))\n",
     "import triskele"
    ]
@@ -133,7 +133,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "nb_split = 10\n",
+    "nb_split = 5\n",
     "\n",
     "def semantic_cvg(gt, nb_split, step=0):\n",
     "    test_part = 1 / nb_split\n",
@@ -162,15 +162,6 @@
     "plt.show()"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "gt == lbli"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {},