250 lines
10 KiB
Python
250 lines
10 KiB
Python
#!/usr/bin/env python3
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"""
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This tool helps create selfie timelapses from your Immich instance.
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It uses the powerful machine learning features of Immich to gather all the photographs where a particular individual
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appears, retrieves the bounding box metadata, and automatically crops and aligns the photos.
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Some manual sorting is still required to achieve the best effect in the video.
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I personally found that a video frame rate of 15 fps looks pretty good.
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Script by Arnaud Cayrol
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"""
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import os
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import io
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import requests
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import concurrent.futures
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import argparse
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from datetime import datetime
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from PIL import Image, ImageOps
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import numpy as np
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import cv2
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import dlib
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from tqdm import tqdm
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def get_assets_with_person(api_key, base_url, person_id):
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headers = {
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'Content-Type': 'application/json',
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'Accept': 'application/json',
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'x-api-key': api_key,
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}
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url = f"{base_url}/search/metadata"
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all_assets = []
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payload = {
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"page": 1,
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"type": "IMAGE",
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"personIds": [person_id],
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"withArchived": False,
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"withDeleted": True,
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"withExif": True,
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"withPeople": True,
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"withStacked": True,
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}
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while payload["page"] is not None:
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response = requests.post(url, headers=headers, json=payload)
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if response.status_code != 200:
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print(f"Error fetching page {payload['page']}: {response.status_code} - {response.text}")
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break
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data = response.json()
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if not data:
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break
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all_assets.extend(data['assets']['items'])
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print(f"Fetched page {payload['page']} with {len(data['assets']['items'])} assets")
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payload["page"] = data['assets'].get('nextPage')
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return all_assets
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def download_asset(api_key, base_url, asset_id):
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headers = {'x-api-key': api_key}
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response = requests.get(f'{base_url}/assets/{asset_id}/original', headers=headers)
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response.raise_for_status()
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return response.content
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def format_timestamp(timestamp):
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dt = datetime.fromisoformat(timestamp.replace("Z", "+00:00"))
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return dt.strftime("%Y%m%d_%H%M%S")
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def crop_face_from_metadata(image, face_data, padding_percent):
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face_img_width = face_data.get("imageWidth")
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face_img_height = face_data.get("imageHeight")
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img_width, img_height = image.size
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scale_x = img_width / face_img_width
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scale_y = img_height / face_img_height
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x1 = int(face_data.get("boundingBoxX1", 0) * scale_x)
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x2 = int(face_data.get("boundingBoxX2", 0) * scale_x)
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y1 = int(face_data.get("boundingBoxY1", 0) * scale_y)
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y2 = int(face_data.get("boundingBoxY2", 0) * scale_y)
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w = x2 - x1
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h = y2 - y1
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padding = int(max(w, h) * padding_percent)
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new_x1 = max(x1 - padding, 0)
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new_y1 = max(y1 - padding, 0)
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new_x2 = min(x2 + padding, img_width)
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new_y2 = min(y2 + padding, img_height)
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return image.crop((new_x1, new_y1, new_x2, new_y2))
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def get_head_pose(shape, img_size):
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image_points = np.array([
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(shape.part(30).x, shape.part(30).y),
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(shape.part(8).x, shape.part(8).y),
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(shape.part(36).x, shape.part(36).y),
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(shape.part(45).x, shape.part(45).y),
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(shape.part(48).x, shape.part(48).y),
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(shape.part(54).x, shape.part(54).y)
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], dtype="double")
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model_points = np.array([
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(0.0, 0.0, 0.0),
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(0.0, -330.0, -65.0),
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(-225.0, 170.0, -135.0),
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(225.0, 170.0, -135.0),
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(-150.0, -150.0, -125.0),
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(150.0, -150.0, -125.0)
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])
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w, h = img_size
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focal_length = w
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center = (w / 2, h / 2)
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camera_matrix = np.array(
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[[focal_length, 0, center[0]],
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[0, focal_length, center[1]],
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[0, 0, 1]], dtype="double"
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)
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dist_coeffs = np.zeros((4, 1))
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success, rotation_vector, translation_vector = cv2.solvePnP(
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model_points, image_points, camera_matrix, dist_coeffs, flags=cv2.SOLVEPNP_ITERATIVE
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)
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rotation_mat, _ = cv2.Rodrigues(rotation_vector)
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proj_matrix = np.hstack((rotation_mat, translation_vector))
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_, _, _, _, _, _, eulerAngles = cv2.decomposeProjectionMatrix(proj_matrix)
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pitch, yaw, roll = [float(angle) for angle in eulerAngles]
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return pitch, yaw, roll
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def align_face(image, predictor, detector, desired_face_width, desired_face_height,
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desired_left_eye, pose_threshold):
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image_np = np.array(image)
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gray = cv2.cvtColor(image_np, cv2.COLOR_RGB2GRAY)
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rects = detector(gray, 2)
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if not rects:
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print("No face detected in the crop. Discarding.")
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return None
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rect = rects[0]
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shape = predictor(gray, rect)
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img_size = (image_np.shape[1], image_np.shape[0])
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pitch, yaw, roll = get_head_pose(shape, img_size)
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if abs(abs(pitch) - 180) > pose_threshold or abs(yaw) > pose_threshold:
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print(f"Face not frontal enough: pitch={pitch:.2f}, yaw={yaw:.2f}, roll={roll:.2f}. Discarding.")
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return None
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shape_np = np.array([(shape.part(i).x, shape.part(i).y) for i in range(68)], dtype="int")
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left_eye_center = shape_np[36:42].mean(axis=0).astype("int")
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right_eye_center = shape_np[42:48].mean(axis=0).astype("int")
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dY = right_eye_center[1] - left_eye_center[1]
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dX = right_eye_center[0] - left_eye_center[0]
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angle = np.degrees(np.arctan2(dY, dX))
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eye_distance = np.linalg.norm(right_eye_center - left_eye_center)
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desired_right_eye_x = 1.0 - desired_left_eye[0]
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desired_eye_distance = (desired_right_eye_x - desired_left_eye[0]) * desired_face_width
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scale = desired_eye_distance / eye_distance
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eyes_center = ((left_eye_center[0] + right_eye_center[0]) / 2.0,
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(left_eye_center[1] + right_eye_center[1]) / 2.0)
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adjusted_scale = scale * 0.8
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M = cv2.getRotationMatrix2D(eyes_center, angle, adjusted_scale)
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extra_offset_x = 10
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tX = desired_face_width * 0.5 + extra_offset_x
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tY = desired_face_height * desired_left_eye[1]
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M[0, 2] += (tX - eyes_center[0])
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M[1, 2] += (tY - eyes_center[1])
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aligned_face_np = cv2.warpAffine(
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image_np,
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M,
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(desired_face_width, desired_face_height),
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flags=cv2.INTER_CUBIC,
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borderMode=cv2.BORDER_REPLICATE
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)
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return Image.fromarray(aligned_face_np)
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def process_asset_worker(asset, api_key, base_url, person_id, output_folder,
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padding_percent, min_face_width, min_face_height,
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resize_width, resize_height, pose_threshold, desired_left_eye):
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local_detector = dlib.get_frontal_face_detector()
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predictor_path = "shape_predictor_68_face_landmarks.dat"
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local_predictor = dlib.shape_predictor(predictor_path)
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try:
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asset_id = asset['id']
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timestamp = format_timestamp(asset['fileCreatedAt'])
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image_bytes = download_asset(api_key, base_url, asset_id)
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image = Image.open(io.BytesIO(image_bytes))
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image = ImageOps.exif_transpose(image)
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image = image.convert("RGB")
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except Exception as e:
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print(f"Error processing asset {asset.get('id')}: {e}")
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return None
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matching_person = next((p for p in asset.get('people', []) if p.get('id') == person_id), None)
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if not matching_person:
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print("Subject not in image.")
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return None
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faces = matching_person.get('faces', [])
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if not faces:
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print("No face data available.")
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return None
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face_data = faces[0]
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cropped_face = crop_face_from_metadata(image, face_data, padding_percent)
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face_width, face_height = cropped_face.size
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if face_width < min_face_width or face_height < min_face_height:
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print(f"Face resolution too low ({face_width}x{face_height}).")
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return None
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aligned_face = align_face(cropped_face, local_predictor, local_detector,
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desired_face_width=resize_width,
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desired_face_height=resize_height,
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desired_left_eye=desired_left_eye,
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pose_threshold=pose_threshold)
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if aligned_face is None:
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return None
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filename = os.path.join(output_folder, f"{timestamp}.jpg")
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aligned_face.save(filename)
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return filename
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def main():
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parser = argparse.ArgumentParser(description="Process and align faces from assets.")
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parser.add_argument("--api-key", required=True, help="API key for authentication")
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parser.add_argument("--base-url", required=True, help="Base URL for the API")
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parser.add_argument("--person-id", required=True, help="ID of the person to search for")
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parser.add_argument("--output-folder", default="output", help="Folder to save output images")
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parser.add_argument("--padding-percent", type=float, default=0.3, help="Padding percentage for face crop")
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parser.add_argument("--resize-width", type=int, default=512, help="Output image width")
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parser.add_argument("--resize-height", type=int, default=512, help="Output image height")
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parser.add_argument("--min-face-width", type=int, default=128, help="Minimum face width")
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parser.add_argument("--min-face-height", type=int, default=128, help="Minimum face height")
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parser.add_argument("--pose-threshold", type=float, default=25, help="Threshold for acceptable head orientation towards camera")
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parser.add_argument("--desired-left-eye", type=float, nargs=2, default=[0.35, 0.45],
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help="Desired left eye position as fraction (x y) in the output image")
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parser.add_argument("--max-workers", type=int, default=4, help="Maximum number of parallel workers")
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args = parser.parse_args()
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os.makedirs(args.output_folder, exist_ok=True)
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assets = get_assets_with_person(args.api_key, args.base_url, args.person_id)
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print(f"Found {len(assets)} assets containing the person.")
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process_args = (
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args.api_key, args.base_url, args.person_id, args.output_folder,
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args.padding_percent, args.min_face_width, args.min_face_height,
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args.resize_width, args.resize_height, args.pose_threshold, tuple(args.desired_left_eye)
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)
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with concurrent.futures.ProcessPoolExecutor(max_workers=args.max_workers) as executor:
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results = list(tqdm(
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executor.map(lambda asset: process_asset_worker(asset, *process_args), assets),
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total=len(assets)
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))
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processed_files = [r for r in results if r is not None]
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print(f"Finished processing. {len(processed_files)} images saved.")
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if __name__ == "__main__":
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main()
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