mirror of
https://github.com/PR0M3TH3AN/unredact.git
synced 2026-10-27 08:40:29 +00:00
91 lines
3.0 KiB
Python
91 lines
3.0 KiB
Python
"""Test that full search with pixel scoring finds the correct font."""
|
|
import numpy as np
|
|
from PIL import Image, ImageDraw, ImageFont
|
|
|
|
from unredact.pipeline.font_detect import _find_font_path, _full_search, _score_font_line_pixel
|
|
from unredact.pipeline.ocr import OcrChar, OcrLine
|
|
|
|
|
|
def _make_line_and_crop(font_name: str, font_size: int, text: str):
|
|
"""Render text with a known font and return (OcrLine, grayscale_crop)."""
|
|
font_path = _find_font_path(font_name)
|
|
assert font_path is not None, f"Font {font_name} not found"
|
|
font = ImageFont.truetype(str(font_path), font_size)
|
|
|
|
bbox = font.getbbox(text)
|
|
text_w = bbox[2] - bbox[0]
|
|
text_h = bbox[3] - bbox[1]
|
|
|
|
pad = 10
|
|
img = Image.new("L", (text_w + pad * 2, text_h + pad * 2), 255)
|
|
draw = ImageDraw.Draw(img)
|
|
draw.text((pad - bbox[0], pad - bbox[1]), text, font=font, fill=0)
|
|
|
|
words = text.split()
|
|
chars = []
|
|
cursor_x = pad
|
|
for wi, word in enumerate(words):
|
|
word_bbox = font.getbbox(word)
|
|
word_w = word_bbox[2] - word_bbox[0]
|
|
char_w = word_w / len(word)
|
|
for ci, ch in enumerate(word):
|
|
chars.append(OcrChar(
|
|
text=ch,
|
|
x=int(cursor_x + ci * char_w),
|
|
y=pad,
|
|
w=max(1, int(char_w)),
|
|
h=text_h,
|
|
conf=95.0,
|
|
))
|
|
cursor_x += word_w
|
|
if wi < len(words) - 1:
|
|
space_w = font.getlength(" ")
|
|
chars.append(OcrChar(
|
|
text=" ", x=int(cursor_x), y=pad,
|
|
w=max(1, int(space_w)), h=text_h, conf=95.0,
|
|
))
|
|
cursor_x += space_w
|
|
|
|
line = OcrLine(
|
|
chars=chars,
|
|
x=pad, y=pad,
|
|
w=int(cursor_x - pad), h=text_h,
|
|
)
|
|
|
|
crop = np.array(img)
|
|
return line, crop
|
|
|
|
|
|
def test_full_search_finds_correct_serif():
|
|
"""Full search should identify Times New Roman text as TNR."""
|
|
text = "Got it. Sent an email."
|
|
line, crop = _make_line_and_crop("Times New Roman", 50, text)
|
|
|
|
scorer = lambda font: _score_font_line_pixel(font, line, crop)
|
|
results = _full_search(line.h, scorer)
|
|
assert results
|
|
best = results[0]
|
|
assert "Times" in best.font_name or "Liberation Serif" in best.font_name, (
|
|
f"Expected serif font, got {best.font_name}"
|
|
)
|
|
assert 47 <= best.font_size <= 53, (
|
|
f"Expected size ~50, got {best.font_size}"
|
|
)
|
|
|
|
|
|
def test_full_search_finds_correct_sans():
|
|
"""Full search should identify Arial text as Arial or Liberation Sans."""
|
|
text = "The quick brown fox jumps."
|
|
line, crop = _make_line_and_crop("Arial", 44, text)
|
|
|
|
scorer = lambda font: _score_font_line_pixel(font, line, crop)
|
|
results = _full_search(line.h, scorer)
|
|
assert results
|
|
best = results[0]
|
|
assert "Arial" in best.font_name or "Liberation Sans" in best.font_name, (
|
|
f"Expected sans-serif font, got {best.font_name}"
|
|
)
|
|
assert 41 <= best.font_size <= 47, (
|
|
f"Expected size ~44, got {best.font_size}"
|
|
)
|