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6c65498 ecbaf10 6c65498 ecbaf10 6c65498 1f3bac1 6c65498 ecbaf10 6c65498 ecbaf10 6c65498 1f3bac1 6c65498 ecbaf10 1f3bac1 ecbaf10 6c65498 1f3bac1 6c65498 1f3bac1 6c65498 1f3bac1 6c65498 1f3bac1 6c65498 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 | """
Digit template library for storing and managing play clock digit templates.
This module provides the DigitTemplateLibrary class for saving, loading, and
managing digit templates used for play clock reading.
"""
import json
import logging
from pathlib import Path
from typing import Any, Dict, List, Optional, Tuple
import cv2
from .coverage import ONES_DIGITS, calculate_coverage_status, categorize_template_keys
from .models import DigitTemplate
logger = logging.getLogger(__name__)
class DigitTemplateLibrary:
"""
Stores and manages digit templates for play clock reading.
Uses color normalization to handle both red and white digits with a single
template set. Now supports position-aware templates to handle both single-digit
(centered) and double-digit (left/right split) layouts:
- Ones digits (center): 0-9 from single-digit displays (10 templates)
- Ones digits (right): 0-9 from double-digit displays (10 templates)
- Tens digits (left): 1, 2, 3, 4 from double-digit displays (4 templates)
- Blank (left): Empty tens position from single-digit displays (1 template)
Total: 25 templates needed for full coverage
"""
# Template coverage requirements
ONES_DIGITS = list(range(10)) # 0-9
TENS_DIGITS = [-1, 1, 2, 3, 4] # -1 = blank, 1-4 for 10-40
POSITIONS = ["left", "center", "right"]
def __init__(self) -> None:
"""Initialize empty template library."""
# Templates: {(is_tens, digit_value, position): DigitTemplate}
self.templates: Dict[Tuple[bool, int, str], DigitTemplate] = {}
logger.info("DigitTemplateLibrary initialized (empty)")
def add_template(self, template: DigitTemplate) -> None:
"""
Add a template to the library.
Args:
template: DigitTemplate to add
"""
key = (template.is_tens_digit, template.digit_value, template.position)
self.templates[key] = template
digit_display = "blank" if template.digit_value == -1 else str(template.digit_value)
logger.debug(
"Added template: tens=%s, digit=%s, position=%s",
template.is_tens_digit,
digit_display,
template.position,
)
def get_template(self, is_tens: bool, digit_value: int, position: str) -> Optional[DigitTemplate]:
"""
Get a template from the library.
Args:
is_tens: Whether this is a tens digit
digit_value: The digit value (-1 for blank, 0-9 for digits)
position: Template position ("left", "center", or "right")
Returns:
DigitTemplate if found, None otherwise
"""
key = (is_tens, digit_value, position)
return self.templates.get(key)
def get_all_templates(self, is_tens: bool, position: Optional[str] = None) -> List[DigitTemplate]:
"""
Get all templates for a specific digit position.
Args:
is_tens: Whether to get tens digit templates
position: Optional position filter ("left", "center", or "right")
Returns:
List of matching DigitTemplate objects
"""
templates = []
for (tens, _, pos), template in self.templates.items():
if tens == is_tens:
if position is None or pos == position:
templates.append(template)
return templates
def get_coverage_status(self) -> Dict[str, Any]:
"""
Get the current template coverage status.
Returns:
Dictionary with coverage information
"""
# Use shared utility to categorize template keys
ones_center_have, ones_right_have, tens_have, has_blank = categorize_template_keys(self.templates.keys())
# Get base coverage status from shared utility
status = calculate_coverage_status(ones_center_have, ones_right_have, tens_have, has_blank, total_items=len(self.templates))
# Convert -1 to "blank" for display
def format_tens(digits: set[int]) -> list[str | int]:
return sorted(["blank" if d == -1 else d for d in digits], key=lambda x: (isinstance(x, str), x))
# Add legacy fields for backward compatibility
status["ones_have"] = sorted(ones_center_have | ones_right_have)
status["ones_missing"] = sorted((ONES_DIGITS - ones_center_have) & (ONES_DIGITS - ones_right_have))
status["tens_have_formatted"] = format_tens(tens_have | ({-1} if has_blank else set()))
status["tens_missing_formatted"] = format_tens(set(status["tens_missing"]) | (set() if has_blank else {-1}))
return status
def is_complete(self) -> bool:
"""Check if all required templates are present."""
return bool(self.get_coverage_status()["is_complete"])
def save(self, output_path: str) -> None:
"""
Save templates to disk.
Args:
output_path: Path to save directory
"""
output_dir = Path(output_path)
output_dir.mkdir(parents=True, exist_ok=True)
templates_list: list[dict[str, object]] = []
for (is_tens, digit, position), template in self.templates.items():
# Use "blank" instead of -1 for the empty tens digit in filenames
digit_str = "blank" if digit == -1 else str(digit)
position_suffix = f"_{position}" if position != "left" or not is_tens else ""
filename = f"{'tens' if is_tens else 'ones'}_{digit_str}{position_suffix}.png"
cv2.imwrite(str(output_dir / filename), template.template)
templates_list.append(
{
"filename": filename,
"digit_value": digit_str, # Use "blank" for display
"is_tens_digit": template.is_tens_digit,
"position": position,
"sample_count": template.sample_count,
"avg_confidence": template.avg_confidence,
}
)
metadata = {"templates": templates_list, "version": 2} # Version 2 includes position
with open(output_dir / "templates_metadata.json", "w", encoding="utf-8") as f:
json.dump(metadata, f, indent=2)
logger.info("Saved %d templates to %s", len(self.templates), output_path)
def load(self, input_path: str) -> bool:
"""
Load templates from disk.
Args:
input_path: Path to templates directory
Returns:
True if loaded successfully, False otherwise
"""
input_dir = Path(input_path)
metadata_path = input_dir / "templates_metadata.json"
if not metadata_path.exists():
logger.warning("No templates metadata found at %s", metadata_path)
return False
with open(metadata_path, "r", encoding="utf-8") as f:
metadata = json.load(f)
version = metadata.get("version", 1)
for entry in metadata.get("templates", []):
img_path = input_dir / entry["filename"]
if img_path.exists():
template_img = cv2.imread(str(img_path), cv2.IMREAD_GRAYSCALE)
if template_img is not None:
# Convert "blank" back to -1 for internal use
digit_value = entry["digit_value"]
if digit_value == "blank":
digit_value = -1
elif isinstance(digit_value, str):
digit_value = int(digit_value)
# Handle position (v2) or infer from old format (v1)
is_tens = entry["is_tens_digit"]
if version >= 2:
position = entry.get("position", "left" if is_tens else "right")
else:
# V1 format: tens → left, ones → right (old behavior)
position = "left" if is_tens else "right"
template = DigitTemplate(
digit_value=digit_value,
is_tens_digit=is_tens,
position=position,
template=template_img,
sample_count=entry.get("sample_count", 1),
avg_confidence=entry.get("avg_confidence", 1.0),
)
self.add_template(template)
logger.info("Loaded %d templates from %s (v%d format)", len(self.templates), input_path, version)
return True
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