patchy/keys
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Choose key label from box instead of point

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This commit is contained in:
Ian Gulliver
2024-08-17 15:43:10 -07:00
parent ee1fa51bb5
commit f7f2d9aaa5
1 changed files with 11 additions and 5 deletions
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16
chromakey.py
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@@ -6,11 +6,12 @@ from wand.image import Image
import numpy as np import numpy as np
def chroma_key(img, num_object_colors=1, key_coords=(0,0)): def chroma_key(img, num_object_colors=1, key_box=((0,0),(100,100))):
hsv = _hsv_points(img) hsv = _hsv_points(img)
hsv_cart = _hsv_to_cartesian(hsv) hsv_cart = _hsv_to_cartesian(hsv)
labels = _cluster(hsv_cart, num_object_colors+1, img) labels = _cluster(hsv_cart, num_object_colors+1, img)
mask = _create_mask(labels, key_coords) key_label = _choose_key(labels, key_box)
mask = _create_mask(labels, key_label)
_apply_mask(img, mask) _apply_mask(img, mask)
@@ -38,13 +39,18 @@ def _cluster(points, num_clusters, img):
return kmeans.labels_.reshape(img.height, img.width) return kmeans.labels_.reshape(img.height, img.width)
def _choose_key(labels, key_box):
box_labels = labels[key_box[0][0]:key_box[1][0], key_box[0][1]:key_box[1][1]]
values, counts = np.unique(box_labels.flatten(), return_counts=True)
i = np.argmax(counts)
return values[i]
def _islands(mask): def _islands(mask):
z = np.zeros_like(mask) z = np.zeros_like(mask)
def _create_mask(labels, key_label):
def _create_mask(labels, key_coords):
key_label = labels[key_coords]
return (labels != key_label).astype(np.uint8) * 255 return (labels != key_label).astype(np.uint8) * 255