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momentry_core/scripts/search_blue_stamp.py
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2026-05-04 01:31:21 +08:00

101 lines
3.2 KiB
Python

#!/opt/homebrew/bin/python3.11
"""
Find Inverted Jenny Stamp (Blue Rectangle in Hands)
"""
import cv2
import numpy as np
import os
UUID = "384b0ff44aaaa1f1"
BASE_DIR = f"output/{UUID}/florence2_results"
# Frames to check
FRAMES = [
"scan_6756.jpg", # 112:36
"scan_6763.jpg", # 112:43
"scan_6790.jpg", # 113:10
"scan_6813.jpg", # 113:33
"scan_6832.jpg", # 113:52
]
print("🔍 Searching for SMALL BLUE RECTANGLES in hands (Inverted Jenny)...")
for frame_name in FRAMES:
img_path = os.path.join(BASE_DIR, frame_name)
if not os.path.exists(img_path):
continue
img = cv2.imread(img_path)
hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
# 1. Hand Detection (Skin Tone) - Broad range
skin_mask = cv2.inRange(hsv, np.array([0, 20, 40]), np.array([25, 150, 255]))
# Clean up mask
kernel = np.ones((5, 5), np.uint8)
skin_mask = cv2.morphologyEx(skin_mask, cv2.MORPH_CLOSE, kernel)
skin_mask = cv2.morphologyEx(skin_mask, cv2.MORPH_OPEN, kernel)
# 2. Blue Detection (Stamp Background)
# Inverted Jenny is Blue and Red. We look for the Blue part.
blue_mask = cv2.inRange(hsv, np.array([90, 40, 40]), np.array([130, 255, 255]))
# 3. Intersection: Blue INSIDE/NEAR Hands
# We dilate the skin mask to include things held IN the hand
skin_dilated = cv2.dilate(skin_mask, kernel, iterations=3)
# Find blue things touching hands
stamp_candidate_mask = cv2.bitwise_and(blue_mask, skin_dilated)
# 4. Find contours in the intersection
contours, _ = cv2.findContours(
stamp_candidate_mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE
)
print(f"\n🎞️ Scanning {frame_name}...")
found_count = 0
for cnt in contours:
x, y, w, h = cv2.boundingRect(cnt)
area = cv2.contourArea(cnt)
# Stamp size: Small rectangle (bigger than a dot, smaller than a face)
# Area: 200 - 5000 pixels
if 200 < area < 5000:
aspect_ratio = float(w) / h
# Check if it looks like a stamp (rectangular, aspect ratio 0.8 - 1.5 roughly)
if 0.6 < aspect_ratio < 1.8:
found_count += 1
print(f" ✅ Candidate: Area={int(area)}, Pos=({x},{y}), Size={w}x{h}")
# Crop with padding
pad = 5
crop = img[
max(0, y - pad) : min(img.shape[0], y + h + pad),
max(0, x - pad) : min(img.shape[1], x + w + pad),
]
crop_path = os.path.join(
BASE_DIR, f"blue_stamp_{frame_name}_{x}_{y}.jpg"
)
cv2.imwrite(crop_path, crop)
# Draw on main image
cv2.rectangle(img, (x, y), (x + w, y + h), (0, 255, 0), 3)
cv2.putText(
img,
"BLUE STAMP?",
(x, y - 10),
cv2.FONT_HERSHEY_SIMPLEX,
0.6,
(0, 255, 0),
2,
)
if found_count == 0:
print(" ❌ No blue stamp candidates found in hands.")
else:
res_path = os.path.join(BASE_DIR, f"result_blue_{frame_name}")
cv2.imwrite(res_path, img)