Datasets:

prasatee
/

pid_lines_dataset

license: mit
task_categories:
  - image-segmentation
  - object-detection
tags:
  - P&ID
  - lines
  - pipelines
  - engineering
  - diagrams
  - line-detection
size_categories:
  - 1K<n<10K

P&ID Line Detection Dataset

This dataset contains cropped images from P&ID (Piping and Instrumentation Diagrams) with line segment annotations for line detection and segmentation tasks.

Dataset Description

Total source images: 500
Total cropped samples: 10000
Total line segments: 44754
Crops per image: 20
Image sizes: Various sizes under 1000px (e.g., 300x500, 512x768, 900x900)

Dataset Structure

Each sample contains:

file_name: Image filename
source_image_idx: Index of the original P&ID image
crop_idx: Index of this crop from the source image
width: Crop width in pixels
height: Crop height in pixels
lines: Dictionary with:
- segments: List of line segments as [x1, y1, x2, y2] (start and end points)
- line_types: List of line types ("solid" or "dashed")
- pipelines: List of pipeline names for each line

Usage

from datasets import load_dataset

# Load the dataset
dataset = load_dataset("imagefolder", data_dir="path/to/lines_dataset")

# Access a sample
sample = dataset["train"][0]
image = sample["image"]
lines = sample["lines"]
segments = lines["segments"]      # [[x1, y1, x2, y2], ...]
line_types = lines["line_types"]  # ["solid", "dashed", ...]
pipelines = lines["pipelines"]    # ["5\"-EK-2648", ...]

# Draw lines on image
from PIL import ImageDraw
draw = ImageDraw.Draw(image)
for seg in segments:
    x1, y1, x2, y2 = seg
    draw.line([(x1, y1), (x2, y2)], fill="blue", width=3)
image.show()

Line Segment Format

Each line segment is represented as [x1, y1, x2, y2] where:

(x1, y1) is the start point
(x2, y2) is the end point
Coordinates are in pixels, relative to the cropped image
Only lines where both endpoints are fully inside the crop are included

Line Types

solid: Continuous pipeline lines
dashed: Dashed lines (often representing signal/instrument lines)

License

MIT License