Create test_draw.py

DataAnnotation/labelme/tests/labelme_tests/utils_tests/test_draw.py

+import numpy as np
+
+from labelme.utils import draw as draw_module
+from labelme.utils import shape as shape_module
+
+from .util import get_img_and_lbl
+
+
+# -----------------------------------------------------------------------------
+
+
+def test_label_colormap():
+    N = 255
+    colormap = draw_module.label_colormap(N=N)
+    assert colormap.shape == (N, 3)
+
+
+def test_label2rgb():
+    img, lbl, label_names = get_img_and_lbl()
+    n_labels = len(label_names)
+
+    viz = draw_module.label2rgb(lbl=lbl, n_labels=n_labels)
+    assert lbl.shape == viz.shape[:2]
+    assert viz.dtype == np.uint8
+
+    viz = draw_module.label2rgb(lbl=lbl, img=img, n_labels=n_labels)
+    assert img.shape[:2] == lbl.shape == viz.shape[:2]
+    assert viz.dtype == np.uint8
+
+
+def test_draw_label():
+    img, lbl, label_names = get_img_and_lbl()
+
+    viz = draw_module.draw_label(lbl, img, label_names=label_names)
+    assert viz.shape[:2] == img.shape[:2] == lbl.shape[:2]
+    assert viz.dtype == np.uint8
+
+
+def test_draw_instances():
+    img, lbl, label_names = get_img_and_lbl()
+    labels_and_masks = {l: lbl == l for l in np.unique(lbl) if l != 0}
+    labels, masks = zip(*labels_and_masks.items())
+    masks = np.asarray(masks)
+    bboxes = shape_module.masks_to_bboxes(masks)
+    captions = [label_names[l] for l in labels]
+    viz = draw_module.draw_instances(img, bboxes, labels, captions=captions)
+    assert viz.shape[:2] == img.shape[:2]
+    assert viz.dtype == np.uint8