Identifying rectangular ducts and their inside information using Python

Question

Click to see floor plan image:

I'm a mechanical engineer and new to programming.

I want to identify the different color rectangular ducts and information enclosed in them.

Any help would be greatly appreciated.

I've tried extracting the text using tesseract.

Answer 1

Here is first simple script that extracts vector graphics having a non-black border and any text inside them.

import fitz  # PyMuPDF
doc = fitz.open("input.pdf")
page = doc[0]  # first page (0-based numbering scheme)
paths = page.get_drawings()  # extract all vector graphics (list of dictionaries)
for path in paths:
    if path["color"] is None or path["color"] == (0,0,0)
        # ignore borderless graphics and black border
        continue
    print(f"border color {p['color']}")
    text = page.get_text(clip=path["rect"])  # extract any text inside
    print(f"text inside {p['rect']: {text}")

Note: I am a maintainer and the original creator of PyMuPDF.