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import cv2
import matplotlib.pyplot as plt
import numpy as np
import torch
from PIL import Image
def fast_process(
annotations,
image,
device,
scale,
better_quality=False,
mask_random_color=True,
bbox=None,
points=None,
use_retina=True,
withContours=True,
):
if isinstance(annotations[0], dict):
annotations = [annotation["segmentation"] for annotation in annotations]
original_h = image.height
original_w = image.width
if better_quality:
if isinstance(annotations[0], torch.Tensor):
annotations = np.array(annotations.cpu())
for i, mask in enumerate(annotations):
mask = cv2.morphologyEx(
mask.astype(np.uint8), cv2.MORPH_CLOSE, np.ones((3, 3), np.uint8)
)
annotations[i] = cv2.morphologyEx(
mask.astype(np.uint8), cv2.MORPH_OPEN, np.ones((8, 8), np.uint8)
)
if device == "cpu":
annotations = np.array(annotations)
inner_mask = fast_show_mask(
annotations,
plt.gca(),
random_color=mask_random_color,
bbox=bbox,
retinamask=use_retina,
target_height=original_h,
target_width=original_w,
)
else:
if isinstance(annotations[0], np.ndarray):
annotations = np.array(annotations)
annotations = torch.from_numpy(annotations)
inner_mask = fast_show_mask_gpu(
annotations,
plt.gca(),
random_color=mask_random_color,
bbox=bbox,
retinamask=use_retina,
target_height=original_h,
target_width=original_w,
)
if isinstance(annotations, torch.Tensor):
annotations = annotations.cpu().numpy()
if withContours:
contour_all = []
temp = np.zeros((original_h, original_w, 1))
for i, mask in enumerate(annotations):
if type(mask) == dict:
mask = mask["segmentation"]
annotation = mask.astype(np.uint8)
if use_retina == False:
annotation = cv2.resize(
annotation,
(original_w, original_h),
interpolation=cv2.INTER_NEAREST,
)
contours, _ = cv2.findContours(
annotation, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE
)
for contour in contours:
contour_all.append(contour)
cv2.drawContours(temp, contour_all, -1, (255, 255, 255), 2 // scale)
color = np.array([0 / 255, 0 / 255, 255 / 255, 0.9])
contour_mask = temp / 255 * color.reshape(1, 1, -1)
image = image.convert("RGBA")
overlay_inner = Image.fromarray((inner_mask * 255).astype(np.uint8), "RGBA")
image.paste(overlay_inner, (0, 0), overlay_inner)
if withContours:
overlay_contour = Image.fromarray((contour_mask * 255).astype(np.uint8), "RGBA")
image.paste(overlay_contour, (0, 0), overlay_contour)
return image
# CPU post process
def fast_show_mask(
annotation,
ax,
random_color=False,
bbox=None,
retinamask=True,
target_height=960,
target_width=960,
):
mask_sum = annotation.shape[0]
height = annotation.shape[1]
weight = annotation.shape[2]
# annotation is sorted by area
areas = np.sum(annotation, axis=(1, 2))
sorted_indices = np.argsort(areas)[::1]
annotation = annotation[sorted_indices]
index = (annotation != 0).argmax(axis=0)
if random_color == True:
color = np.random.random((mask_sum, 1, 1, 3))
else:
color = np.ones((mask_sum, 1, 1, 3)) * np.array(
[30 / 255, 144 / 255, 255 / 255]
)
transparency = np.ones((mask_sum, 1, 1, 1)) * 0.6
visual = np.concatenate([color, transparency], axis=-1)
mask_image = np.expand_dims(annotation, -1) * visual
mask = np.zeros((height, weight, 4))
h_indices, w_indices = np.meshgrid(
np.arange(height), np.arange(weight), indexing="ij"
)
indices = (index[h_indices, w_indices], h_indices, w_indices, slice(None))
mask[h_indices, w_indices, :] = mask_image[indices]
if bbox is not None:
x1, y1, x2, y2 = bbox
ax.add_patch(
plt.Rectangle(
(x1, y1), x2 - x1, y2 - y1, fill=False, edgecolor="b", linewidth=1
)
)
if retinamask == False:
mask = cv2.resize(
mask, (target_width, target_height), interpolation=cv2.INTER_NEAREST
)
return mask
def fast_show_mask_gpu(
annotation,
ax,
random_color=False,
bbox=None,
retinamask=True,
target_height=960,
target_width=960,
):
device = annotation.device
mask_sum = annotation.shape[0]
height = annotation.shape[1]
weight = annotation.shape[2]
areas = torch.sum(annotation, dim=(1, 2))
sorted_indices = torch.argsort(areas, descending=False)
annotation = annotation[sorted_indices]
# find the first non-zero subscript for each position
index = (annotation != 0).to(torch.long).argmax(dim=0)
if random_color == True:
color = torch.rand((mask_sum, 1, 1, 3)).to(device)
else:
color = torch.ones((mask_sum, 1, 1, 3)).to(device) * torch.tensor(
[30 / 255, 144 / 255, 255 / 255]
).to(device)
transparency = torch.ones((mask_sum, 1, 1, 1)).to(device) * 0.6
visual = torch.cat([color, transparency], dim=-1)
mask_image = torch.unsqueeze(annotation, -1) * visual
# index
mask = torch.zeros((height, weight, 4)).to(device)
h_indices, w_indices = torch.meshgrid(torch.arange(height), torch.arange(weight))
indices = (index[h_indices, w_indices], h_indices, w_indices, slice(None))
# make updates based on indices
mask[h_indices, w_indices, :] = mask_image[indices]
mask_cpu = mask.cpu().numpy()
if bbox is not None:
x1, y1, x2, y2 = bbox
ax.add_patch(
plt.Rectangle(
(x1, y1), x2 - x1, y2 - y1, fill=False, edgecolor="b", linewidth=1
)
)
if retinamask == False:
mask_cpu = cv2.resize(
mask_cpu, (target_width, target_height), interpolation=cv2.INTER_NEAREST
)
return mask_cpu
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