现有第一个文件内所有图片的目标物的多边形坐标(在第二个文件夹内)和目标物的二进制掩码图像(在mask文件夹中)如何才能得到文件夹内图片中目标物的xml形式的实例分割标签并保存到第三个文件夹中(完整代码)
时间: 2024-05-13 17:13:47 浏览: 103
这个问题涉及到一些计算机视觉和数据处理方面的知识,需要使用一些库和工具来完成。以下是一个可能的解决方案,需要使用OpenCV、numpy、lxml等库。
```python
import os
import cv2
import numpy as np
from lxml import etree
# 定义数据路径
img_dir = "/path/to/images"
poly_dir = "/path/to/polygons"
mask_dir = "/path/to/masks"
out_dir = "/path/to/output"
# 获取所有图片的文件名
img_files = sorted(os.listdir(img_dir))
# 遍历每张图片
for img_file in img_files:
# 读取图片
img_path = os.path.join(img_dir, img_file)
img = cv2.imread(img_path)
# 获取多边形坐标
poly_path = os.path.join(poly_dir, img_file[:-4] + ".txt")
with open(poly_path, "r") as f:
lines = f.readlines()
polygons = []
for line in lines:
pts = []
coords = line.strip().split(",")
for i in range(0, len(coords), 2):
pts.append((int(coords[i]), int(coords[i+1])))
polygons.append(pts)
# 获取二进制掩码图像
mask_path = os.path.join(mask_dir, img_file[:-4] + ".png")
mask = cv2.imread(mask_path, cv2.IMREAD_GRAYSCALE)
# 将多边形坐标和掩码图像转换为xml形式
root = etree.Element("annotation")
filename = etree.SubElement(root, "filename")
filename.text = img_file
size = etree.SubElement(root, "size")
width = etree.SubElement(size, "width")
width.text = str(img.shape[1])
height = etree.SubElement(size, "height")
height.text = str(img.shape[0])
depth = etree.SubElement(size, "depth")
depth.text = str(img.shape[2])
for i, polygon in enumerate(polygons):
object = etree.SubElement(root, "object")
name = etree.SubElement(object, "name")
name.text = "object{}".format(i+1)
mask_poly = np.zeros_like(mask)
cv2.fillPoly(mask_poly, [np.array(polygon)], 255)
mask_poly = mask_poly & mask
mask_data = etree.SubElement(object, "mask_data")
mask_data.text = np.array2string(mask_poly, separator="", formatter={"int": lambda x: str(x)})
for pt in polygon:
point = etree.SubElement(object, "point")
x = etree.SubElement(point, "x")
x.text = str(pt[0])
y = etree.SubElement(point, "y")
y.text = str(pt[1])
# 保存xml文件
out_path = os.path.join(out_dir, img_file[:-4] + ".xml")
with open(out_path, "wb") as f:
f.write(etree.tostring(root, pretty_print=True))
```
这个代码会遍历所有图片,读取多边形坐标和掩码图像,将它们转换为xml形式的实例分割标签,并保存到输出文件夹中。其中,多边形坐标存储在以图片文件名为名的txt文件中,每行表示一个多边形,每个多边形的顶点坐标以逗号分隔;掩码图像存储在以图片文件名为名的png文件中,每个像素值为0或255,表示是否属于目标物。
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