Segment Anything Model (SAM): a new AI model from Meta AI that can "cut out" any object, in any image, with a single click.
官方网站:Segment Anything | Meta AI
官网提供了一些demo,交互式地分割展示,可以试一下
官网demo提供了3种分割方式。
点击想要分割的内容,自动完成分割。左键正选,右键反选。
鼠标圈一个方框,自动分割。
GitHub网址:https://github.com/facebookresearch/segment-anything
readme很详细,可按照步骤来搞。
git clone https://github.com/facebookresearch/segment-anything
cd segment-anything; pip install -e .
特别注意-e后面一个点
模型文件放到项目的目录即可。
H,L,B分别表示huge,large,base,从大到小。根据硬件能力选择合适的模型。
如下,建立input,output文件夹
在input中存放待分割的图片,output用作存放输出的mask。
在pycharm终端中使用下面的命令:
使用base模型
python scripts/amg.py --checkpoint sam_vit_b_01ec64.pth --model-type vit_b --input C:\GithubFile\segment-anything\input --output C:\GithubFile\segment-anything\output
使用huge模型
python scripts/amg.py --checkpoint sam_vit_h_4b8939.pth --model-type vit_h --input C:\GithubFile\segment-anything\input --output C:\GithubFile\segment-anything\output
官方命令即执行amg.py文件,并传入了一些参数,当传入参数固定时可以直接写在amg.py文件中。
加入default=你的路径,并且将required改为False, 其他各项类似。help中会有一些辅助说明。
输入:
结果:
代码参考:segment-anything本地部署使用_yunteng521的博客-CSDN博客
import cv2
import os
import numpy as np
from segment_anything import sam_model_registry, SamPredictor
input_dir = 'input'
output_dir = 'output'
crop_mode = True # 是否裁剪到最小范围
# alpha_channel是否保留透明通道
print('最好是每加一个点就按w键predict一次')
os.makedirs(output_dir, exist_ok=True)
image_files = [f for f in os.listdir(input_dir) if
f.lower().endswith(('.png', '.jpg', '.jpeg', '.JPG', '.JPEG', '.PNG'))]
# sam = sam_model_registry["vit_b"](checkpoint="sam_vit_b_01ec64.pth")
sam = sam_model_registry["vit_h"](checkpoint="sam_vit_h_4b8939.pth")
# 添加使用的模型,用A就把B注释掉
_ = sam.to(device="cuda") # 注释掉这一行,会用cpu运行,速度会慢很多
predictor = SamPredictor(sam) # SAM预测图像
def mouse_click(event, x, y, flags, param): # 鼠标点击事件
global input_point, input_label, input_stop # 全局变量,输入点,
if not input_stop: # 判定标志是否停止输入响应了!
if event == cv2.EVENT_LBUTTONDOWN: # 鼠标左键
input_point.append([x, y])
input_label.append(1) # 1表示前景点
elif event == cv2.EVENT_RBUTTONDOWN: # 鼠标右键
input_point.append([x, y])
input_label.append(0) # 0表示背景点
else:
if event == cv2.EVENT_LBUTTONDOWN or event == cv2.EVENT_RBUTTONDOWN: # 提示添加不了
print('此时不能添加点,按w退出mask选择模式')
def apply_mask(image, mask, alpha_channel=True): # 应用并且响应mask
if alpha_channel:
alpha = np.zeros_like(image[..., 0]) # 制作掩体
alpha[mask == 1] = 255 # 兴趣地方标记为1,且为白色
image = cv2.merge((image[..., 0], image[..., 1], image[..., 2], alpha)) # 融合图像
else:
image = np.where(mask[..., None] == 1, image, 0)
return image
def apply_color_mask(image, mask, color, color_dark=0.5): # 对掩体进行赋予颜色
for c in range(3):
image[:, :, c] = np.where(mask == 1, image[:, :, c] * (1 - color_dark) + color_dark * color[c], image[:, :, c])
return image
def get_next_filename(base_path, filename): # 进行下一个图像
name, ext = os.path.splitext(filename)
for i in range(1, 3):
new_name = f"{name}_{i}{ext}"
if not os.path.exists(os.path.join(base_path, new_name)):
return new_name
return None
def save_masked_image(image, mask, output_dir, filename, crop_mode_): # 保存掩盖部分的图像(感兴趣的图像)
if crop_mode_:
y, x = np.where(mask)
y_min, y_max, x_min, x_max = y.min(), y.max(), x.min(), x.max()
cropped_mask = mask[y_min:y_max + 1, x_min:x_max + 1]
cropped_image = image[y_min:y_max + 1, x_min:x_max + 1]
masked_image = apply_mask(cropped_image, cropped_mask)
else:
masked_image = apply_mask(image, mask)
filename = filename[:filename.rfind('.')] + '.png'
new_filename = get_next_filename(output_dir, filename)
if new_filename:
if masked_image.shape[-1] == 4:
cv2.imwrite(os.path.join(output_dir, new_filename), masked_image, [cv2.IMWRITE_PNG_COMPRESSION, 9])
else:
cv2.imwrite(os.path.join(output_dir, new_filename), masked_image)
print(f"Saved as {new_filename}")
else:
print("Could not save the image. Too many variations exist.")
current_index = 0
cv2.namedWindow("image")
cv2.setMouseCallback("image", mouse_click)
input_point = []
input_label = []
input_stop = False
while True:
filename = image_files[current_index]
image_orign = cv2.imread(os.path.join(input_dir, filename))
image_crop = image_orign.copy() # 原图裁剪
image = cv2.cvtColor(image_orign.copy(), cv2.COLOR_BGR2RGB) # 原图色彩转变
selected_mask = None
logit_input = None
while True:
# print(input_point)
input_stop = False
image_display = image_orign.copy()
display_info = f'{filename} | Press s to save | Press w to predict | Press d to next image | Press a to previous image | Press space to clear | Press q to remove last point '
cv2.putText(image_display, display_info, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 255, 255), 2, cv2.LINE_AA)
for point, label in zip(input_point, input_label): # 输入点和输入类型
color = (0, 255, 0) if label == 1 else (0, 0, 255)
cv2.circle(image_display, tuple(point), 5, color, -1)
if selected_mask is not None:
color = tuple(np.random.randint(0, 256, 3).tolist())
selected_image = apply_color_mask(image_display, selected_mask, color)
cv2.imshow("image", image_display)
key = cv2.waitKey(1)
if key == ord(" "):
input_point = []
input_label = []
selected_mask = None
logit_input = None
elif key == ord("w"):
input_stop = True
if len(input_point) > 0 and len(input_label) > 0:
# todo 预测图像
predictor.set_image(image) # 设置输入图像
input_point_np = np.array(input_point) # 输入暗示点,需要转变array类型才可以输入
input_label_np = np.array(input_label) # 输入暗示点的类型
# todo 输入暗示信息,将返回masks
masks, scores, logits = predictor.predict(
point_coords=input_point_np,
point_labels=input_label_np,
mask_input=logit_input[None, :, :] if logit_input is not None else None,
multimask_output=True,
)
mask_idx = 0
num_masks = len(masks) # masks的数量
while (1):
color = tuple(np.random.randint(0, 256, 3).tolist()) # 随机列表颜色,就是
image_select = image_orign.copy()
selected_mask = masks[mask_idx] # 选择msks也就是,a,d切换
selected_image = apply_color_mask(image_select, selected_mask, color)
mask_info = f'Total: {num_masks} | Current: {mask_idx} | Score: {scores[mask_idx]:.2f} | Press w to confirm | Press d to next mask | Press a to previous mask | Press q to remove last point | Press s to save'
cv2.putText(selected_image, mask_info, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 255, 255), 2,
cv2.LINE_AA)
# todo 显示在当前的图片,
cv2.imshow("image", selected_image)
key = cv2.waitKey(10)
if key == ord('q') and len(input_point) > 0:
input_point.pop(-1)
input_label.pop(-1)
elif key == ord('s'):
save_masked_image(image_crop, selected_mask, output_dir, filename, crop_mode_=crop_mode)
elif key == ord('a'):
if mask_idx > 0:
mask_idx -= 1
else:
mask_idx = num_masks - 1
elif key == ord('d'):
if mask_idx < num_masks - 1:
mask_idx += 1
else:
mask_idx = 0
elif key == ord('w'):
break
elif key == ord(" "):
input_point = []
input_label = []
selected_mask = None
logit_input = None
break
logit_input = logits[mask_idx, :, :]
print('max score:', np.argmax(scores), ' select:', mask_idx)
elif key == ord('a'):
current_index = max(0, current_index - 1)
input_point = []
input_label = []
break
elif key == ord('d'):
current_index = min(len(image_files) - 1, current_index + 1)
input_point = []
input_label = []
break
elif key == 27:
break
elif key == ord('q') and len(input_point) > 0:
input_point.pop(-1)
input_label.pop(-1)
elif key == ord('s') and selected_mask is not None:
save_masked_image(image_crop, selected_mask, output_dir, filename, crop_mode_=crop_mode)
if key == 27:
break
使用样例:
先点击w标注,
后点击w预测,
然后点击s保存,
点击d下一张。
每张图片标记不只一个mask
个人感觉,这个脚本不太好用。