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Selecting-objects-with-SAM.py
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Selecting-objects-with-SAM.py
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import numpy as np
import matplotlib.pyplot as plt
import cv2
import paddle
def show_mask(mask, ax, random_color=False):
if random_color:
color = np.concatenate([np.random.random(3), np.array([0.6])], axis=0)
else:
color = np.array([30 / 255, 144 / 255, 255 / 255, 0.6])
h, w = mask.shape[-2:]
mask_image = mask.reshape(h, w, 1) * color.reshape(1, 1, -1)
ax.imshow(mask_image)
def show_points(coords, labels, ax, marker_size=375):
pos_points = coords[labels == 1]
neg_points = coords[labels == 0]
ax.scatter(pos_points[:, 0], pos_points[:, 1], color='green', marker='*', s=marker_size, edgecolor='white',
linewidth=1.25)
ax.scatter(neg_points[:, 0], neg_points[:, 1], color='red', marker='*', s=marker_size, edgecolor='white',
linewidth=1.25)
def show_box(box, ax):
x0, y0 = box[0], box[1]
w, h = box[2] - box[0], box[3] - box[1]
ax.add_patch(plt.Rectangle((x0, y0), w, h, edgecolor='green', facecolor=(0, 0, 0, 0), lw=2))
image = cv2.imread('./notebooks/images/truck.jpg')
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
plt.figure(figsize=(10,10))
plt.imshow(image)
plt.axis('on')
plt.show()
sam_checkpoint = "./models/sam_vit_b_01ec64.pdparams"
device = "gpu"
model_type = "vit_b"
import sys
sys.path.append("..")
from segment_anything import sam_model_registry, SamPredictor
sam = sam_model_registry[model_type](checkpoint=sam_checkpoint)
sam.to(device=device)
predictor = SamPredictor(sam)
predictor.set_image(image)
input_boxes = paddle.to_tensor([
[75, 275, 1725, 850],
[425, 600, 700, 875],
[1375, 550, 1650, 800],
[1240, 675, 1400, 750],
])
transformed_boxes = predictor.transform.apply_boxes_torch(input_boxes, image.shape[:2])
masks, _, _ = predictor.predict_torch(
point_coords=None,
point_labels=None,
boxes=transformed_boxes,
multimask_output=False,
)
plt.figure(figsize=(10, 10))
plt.imshow(image)
for mask in masks:
show_mask(mask.numpy(), plt.gca(), random_color=True)
for box in input_boxes:
show_box(box.numpy(), plt.gca())
plt.axis('off')
plt.show()