ImageProcessingTask::resizeImage() - Code Metrics - Inspection of "Dont auto create molder folders, and some fixes." - matiasdelellis/facerecognition - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — self-contained-model ( bde79d...83cd40 )

by Matias

created 2020-03-01 15:47 UTC

ImageProcessingTask::resizeImage() A

↳ Parent: ImageProcessingTask

Complexity

Conditions	5
Paths	4

Size

Total Lines	30
Code Lines	20

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	14
CRAP Score	5.9256

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	5
eloc	20
c	1
b	0
f	0
nc	4
nop	2
dl	0
loc	30
ccs	14
cts	21
cp	0.6667
crap	5.9256
rs	9.2888

<?php
/**
 * @copyright Copyright (c) 2017-2020 Matias De lellis <[email protected]>
 * @copyright Copyright (c) 2018, Branko Kokanovic <[email protected]>
 *
 * @author Branko Kokanovic <[email protected]>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
namespace OCA\FaceRecognition\BackgroundJob\Tasks;

use OCP\Image as OCP_Image;

use OCP\Files\File;
use OCP\Files\Folder;
use OCP\IUser;

use OCA\FaceRecognition\BackgroundJob\FaceRecognitionBackgroundTask;
use OCA\FaceRecognition\BackgroundJob\FaceRecognitionContext;

use OCA\FaceRecognition\Db\Face;
use OCA\FaceRecognition\Db\Image;
use OCA\FaceRecognition\Db\ImageMapper;

use OCA\FaceRecognition\Model\IModel;
use OCA\FaceRecognition\Model\ModelManager;

use OCA\FaceRecognition\Service\FileService;
use OCA\FaceRecognition\Service\SettingsService;

/**
 * Plain old PHP object holding all information
 * that are needed to process all faces from one image
 */
class ImageProcessingContext {
	/** @var string Path to the image being processed */
	private $imagePath;

	/** @var string Path to temporary, resized image */
	private $tempPath;

	/** @var float Ratio of resized image, when scaling it */
	private $ratio;

	/** @var array<Face> All found faces in image */
	private $faces;

	/**
	 * @var bool True if detection should be skipped, but image should be marked as processed.
	 * If this is set, $tempPath and $ratio will be invalid and $faces should be empty array.
	 */
	private $skipDetection;

	public function __construct(string $imagePath, string $tempPath, float $ratio, bool $skipDetection) {
		$this->imagePath = $imagePath;
		$this->tempPath = $tempPath;
		$this->ratio = $ratio;
		$this->faces = array();
		$this->skipDetection = $skipDetection;
	}

	public function getImagePath(): string {
		return $this->imagePath;
	}

	public function getTempPath(): string {
		return $this->tempPath;
	}

	public function getRatio(): float {
		return $this->ratio;
	}

	public function getSkipDetection(): bool {
		return $this->skipDetection;
	}

	/**
	 * Gets all faces
	 *
	 * @return Face[] Array of faces
	 */
	public function getFaces(): array {
		return $this->faces;
	}

	/**
	 * @param array<Face> $faces Array of faces to set
	 */
	public function setFaces($faces) {
		$this->faces = $faces;
	}
}

/**
 * Taks that get all images that are still not processed and processes them.
 * Processing image means that each image is prepared, faces extracted form it,
 * and for each found face - face descriptor is extracted.
 */
class ImageProcessingTask extends FaceRecognitionBackgroundTask {
	/** @var ImageMapper Image mapper*/
	protected $imageMapper;

	/** @var FileService */
	protected $fileService;

	/** @var SettingsService */
	protected $settingsService;

	/** @var ModelManager */
	protected $modelManager;

	/** @var IModel */
	private $model;

	/** @var int|null Maximum image area (cached, so it is not recalculated for each image) */
	private $maxImageAreaCached;

	/**
	 * @param ImageMapper $imageMapper Image mapper
	 * @param FileService $fileService
	 * @param SettingsService $settingsService
	 * @param ModelManager $modelManager Model manager
	 */
	public function __construct(ImageMapper     $imageMapper,
	                            FileService     $fileService,
	                            SettingsService $settingsService,
	                            ModelManager    $modelManager)
	{
		parent::__construct();

		$this->imageMapper        = $imageMapper;
		$this->fileService        = $fileService;
		$this->settingsService    = $settingsService;
		$this->modelManager       = $modelManager;

		$this->model              = null;
		$this->maxImageAreaCached = null;
	}

	/**
	 * @inheritdoc
	 */
	public function description() {
		return "Process all images to extract faces";
	}

	/**
	 * @inheritdoc
	 */
	public function execute(FaceRecognitionContext $context) {
		$this->setContext($context);

		$this->logInfo('NOTE: Starting face recognition. If you experience random crashes after this point, please look FAQ at https://github.com/matiasdelellis/facerecognition/wiki/FAQ');

		// Get current model.
		$modelVersion = $this->settingsService->getCurrentFaceModel();
		$this->model = $this->modelManager->getModel($modelVersion);

		// Open model.
		$this->model->open();

		$images = $context->propertyBag['images'];
		foreach($images as $image) {
			yield;

			$startMillis = round(microtime(true) * 1000);

			try {
				$imageProcessingContext = $this->findFaces($this->model, $image);

				if (($imageProcessingContext !== null) && ($imageProcessingContext->getSkipDetection() === false)) {
					$this->populateDescriptors($this->model, $imageProcessingContext);
				}

				if ($imageProcessingContext === null) {
					continue;
				}

				$endMillis = round(microtime(true) * 1000);
				$duration = max($endMillis - $startMillis, 0);
				$this->imageMapper->imageProcessed($image, $imageProcessingContext->getFaces(), $duration);
			} catch (\Exception $e) {
				if ($e->getMessage() === "std::bad_alloc") {
					throw new \RuntimeException("Not enough memory to run face recognition! Please look FAQ at https://github.com/matiasdelellis/facerecognition/wiki/FAQ");
				}
				$this->logInfo('Faces found: 0. Image will be skipped because of the following error: ' . $e->getMessage());
				$this->logDebug($e);
				$this->imageMapper->imageProcessed($image, array(), 0, $e);
			} finally {
				$this->fileService->clean();
			}
		}

		return true;
	}

	/**
	 * Given an image, it finds all faces on it.
	 * If image should be skipped, returns null.
	 * If there is any error, throws exception
	 *
	 * @param IModel $model Resnet model
	 * @param Image $image Image to find faces on
	 * @return ImageProcessingContext|null Generated context that hold all information needed later for this image
	 */
	private function findFaces(IModel $model, Image $image) {
		// todo: check if this hits I/O (database, disk...), consider having lazy caching to return user folder from user
		$file = $this->fileService->getFileById($image->getFile(), $image->getUser());

		if (empty($file)) {
			// If we cannot find a file probably it was deleted out of our control and we must clean our tables.
			$this->settingsService->setNeedRemoveStaleImages(true, $image->user);
			$this->logInfo('File with ID ' . $image->file . ' doesn\'t exist anymore, skipping it');
			return null;
		}

		$imagePath = $this->fileService->getLocalFile($file);

		$this->logInfo('Processing image ' . $imagePath);
		$imageProcessingContext = $this->prepareImage($imagePath);
		if ($imageProcessingContext->getSkipDetection() === true) {
			$this->logInfo('Faces found: 0 (image will be skipped because it is too small)');
			return $imageProcessingContext;
		}

		// Detect faces from model
		$facesFound = $model->detectFaces($imageProcessingContext->getTempPath());

		// Convert from dictionary of faces to our Face Db Entity
		$faces = array();
		foreach ($facesFound as $faceFound) {
			$face = Face::fromModel($image->getId(), $faceFound);
			$face->normalizeSize($imageProcessingContext->getRatio());
			$faces[] = $face;
		}

		$imageProcessingContext->setFaces($faces);
		$this->logInfo('Faces found: ' . count($faces));

		return $imageProcessingContext;
	}

	/**
	 * Given an image, it will rotate, scale and save image to temp location, ready to be consumed by pdlib.
	 *
	 * @param string $imagePath Path to image on disk
	 *
	 * @return ImageProcessingContext Generated context that hold all information needed later for this image.
	 */
	private function prepareImage(string $imagePath) {
		$image = new OCP_Image(null, $this->context->logger->getLogger(), $this->context->config);
		$image->loadFromFile($imagePath);
		$image->fixOrientation();

		if (!$image->valid()) {
			throw new \RuntimeException("Image is not valid, probably cannot be loaded");
		}

		// Ignore processing of images that are not large enough.
		$minImageSize = $this->settingsService->getMinimumImageSize();
		if ((imagesx($image->resource()) < $minImageSize) || (imagesy($image->resource()) < $minImageSize)) {
			return new ImageProcessingContext($imagePath, "", -1, true);
		}

		$maxImageArea = $this->getMaxImageArea($this->model);
		$ratio = $this->resizeImage($image, $maxImageArea);

		$tempfile = $this->fileService->getTemporaryFile(pathinfo($imagePath, PATHINFO_EXTENSION));
		$image->save($tempfile);

		return new ImageProcessingContext($imagePath, $tempfile, $ratio, false);
	}

	/**
	 * Resizes the image to reach max image area, but preserving ratio.
	 * Stolen and adopted from OC_Image->resize() (difference is that this returns ratio of resize.)
	 *
	 * @param Image $image Image to resize
	 * @param int $maxImageArea The maximum size of image we can handle (in pixels^2).
	 *
	 * @return float Ratio of resize. 1 if there was no resize
	 */
	public function resizeImage(OCP_Image $image, int $maxImageArea): float {
		if (!$image->valid()) {
			$message = "Image is not valid, probably cannot be loaded";
			$this->logInfo($message);
			throw new \RuntimeException($message);
		}

		$widthOrig = imagesx($image->resource());
		$heightOrig = imagesy($image->resource());
		if (($widthOrig <= 0) || ($heightOrig <= 0)) {
			$message = "Image is having non-positive width or height, cannot continue";
			$this->logInfo($message);
			throw new \RuntimeException($message);
		}

		$areaRatio = $maxImageArea / ($widthOrig * $heightOrig);
		$scaleFactor = sqrt($areaRatio);

		$newWidth = intval(round($widthOrig * $scaleFactor));
		$newHeight = intval(round($heightOrig * $scaleFactor));

		$success = $image->preciseResize($newWidth, $newHeight);
		if ($success === false) {
			throw new \RuntimeException("Error during image resize");
		}

		$this->logDebug(sprintf('Image scaled from %dx%d to %dx%d (since max image area is %d pixels^2)',
			$widthOrig, $heightOrig, $newWidth, $newHeight, $maxImageArea));

		return 1 / $scaleFactor;
	}

	/**
	 * Gets all face descriptors in a given image processing context. Populates "descriptor" in array of faces.
	 *
	 * @param IModel $model Resnet model
	 * @param ImageProcessingContext Image processing context
	 */
	private function populateDescriptors(IModel $model, ImageProcessingContext $imageProcessingContext) {
		$faces = $imageProcessingContext->getFaces();

		foreach($faces as &$face) {
			// For each face, we want to detect landmarks and compute descriptors.
			// We use already resized image (from temp, used to detect faces) for this.
			// (better would be to work with original image, but that will require
			// another orientation fix and another save to the temp)
			// But, since our face coordinates are already changed to align to original image,
			// we need to fix them up to align them to temp image here.
			$normalizedFace = clone $face;
			$normalizedFace->normalizeSize(1.0 / $imageProcessingContext->getRatio());

			// We are getting face landmarks from already prepared (temp) image (resized and with orienation fixed).
			$landmarks = $model->detectLandmarks($imageProcessingContext->getTempPath(), array(
				"left" => $normalizedFace->left, "top" => $normalizedFace->top,
				"bottom" => $normalizedFace->bottom, "right" => $normalizedFace->right));
			$face->landmarks = $landmarks['parts'];

			$descriptor = $model->computeDescriptor($imageProcessingContext->getTempPath(), $landmarks);
			$face->descriptor = $descriptor;
		}
	}

	/**
	 * Obtains max image area lazily (from cache, or calculates it and puts it to cache)
	 *
	 * @param IModel $model Resnet model
	 * @return int Max image area (in pixels^2)
	 */
	private function getMaxImageArea(IModel $model): int {
		if (!is_null($this->maxImageAreaCached)) {
			return $this->maxImageAreaCached;
		}

		$this->maxImageAreaCached = $this->calculateMaxImageArea($model);
		return $this->maxImageAreaCached;
	}

	/**
	 * Calculates max image area. This is separate function, as there are several levels of user overrides.
	 *
	 * @param IModel $model Resnet model
	 * @return int Max image area (in pixels^2)
	 */
	private function calculateMaxImageArea(IModel $model): int {
		// First check if we are provided value from command line
		//
		if (
			(array_key_exists('max_image_area', $this->context->propertyBag)) &&
			(!is_null($this->context->propertyBag['max_image_area']))
		) {
				return $this->context->propertyBag['max_image_area'];
		}

		// Check if admin persisted this setting in config and it is valid value
		//
		$maxImageArea = $this->settingsService->getMaximumImageArea();
		if ($maxImageArea > 0) {
			return $maxImageArea;
		}

		// Calculate it from memory
		//
		$allowedMemory = $this->context->propertyBag['memory'];

		// Based on amount on memory PHP have, we will determine maximum amount of image size that we need to scale to.
		// This reasoning and calculations are all based on analysis given here:
		// https://github.com/matiasdelellis/facerecognition/wiki/Performance-analysis-of-DLib%E2%80%99s-CNN-face-detection
		$maxImageArea = intval(($allowedMemory) / $model->getMemoryAreaRelation()); // TODO: Maybe another helper.

		return $maxImageArea;
	}

}

1		<?php
2		/**
3		* @copyright Copyright (c) 2017-2020 Matias De lellis <[email protected]>
4		* @copyright Copyright (c) 2018, Branko Kokanovic <[email protected]>
5		*
6		* @author Branko Kokanovic <[email protected]>
7		*
8		* @license GNU AGPL version 3 or any later version
9		*
10		* This program is free software: you can redistribute it and/or modify
11		* it under the terms of the GNU Affero General Public License as
12		* published by the Free Software Foundation, either version 3 of the
13		* License, or (at your option) any later version.
14		*
15		* This program is distributed in the hope that it will be useful,
16		* but WITHOUT ANY WARRANTY; without even the implied warranty of
17		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18		* GNU Affero General Public License for more details.
19		*
20		* You should have received a copy of the GNU Affero General Public License
21		* along with this program. If not, see <http://www.gnu.org/licenses/>.
22		*
23		*/
24		namespace OCA\FaceRecognition\BackgroundJob\Tasks;
25
26		use OCP\Image as OCP_Image;
27
28		use OCP\Files\File;
29		use OCP\Files\Folder;
30		use OCP\IUser;
31
32		use OCA\FaceRecognition\BackgroundJob\FaceRecognitionBackgroundTask;
33		use OCA\FaceRecognition\BackgroundJob\FaceRecognitionContext;
34
35		use OCA\FaceRecognition\Db\Face;
36		use OCA\FaceRecognition\Db\Image;
37		use OCA\FaceRecognition\Db\ImageMapper;
38
39		use OCA\FaceRecognition\Model\IModel;
40		use OCA\FaceRecognition\Model\ModelManager;
41
42		use OCA\FaceRecognition\Service\FileService;
43		use OCA\FaceRecognition\Service\SettingsService;
44
45		/**
46		* Plain old PHP object holding all information
47		* that are needed to process all faces from one image
48		*/
49		class ImageProcessingContext {
50		/** @var string Path to the image being processed */
51		private $imagePath;
52
53		/** @var string Path to temporary, resized image */
54		private $tempPath;
55
56		/** @var float Ratio of resized image, when scaling it */
57		private $ratio;
58
59		/** @var array<Face> All found faces in image */
60		private $faces;
61
62		/**
63		* @var bool True if detection should be skipped, but image should be marked as processed.
64		* If this is set, $tempPath and $ratio will be invalid and $faces should be empty array.
65		*/
66		private $skipDetection;
67
68		public function __construct(string $imagePath, string $tempPath, float $ratio, bool $skipDetection) {
69		$this->imagePath = $imagePath;
70		$this->tempPath = $tempPath;
71		$this->ratio = $ratio;
72		$this->faces = array();
73		$this->skipDetection = $skipDetection;
74		}
75
76		public function getImagePath(): string {
77		return $this->imagePath;
78		}
79
80		public function getTempPath(): string {
81		return $this->tempPath;
82		}
83
84		public function getRatio(): float {
85		return $this->ratio;
86		}
87
88		public function getSkipDetection(): bool {
89		return $this->skipDetection;
90		}
91
92		/**
93		* Gets all faces
94		*
95		* @return Face[] Array of faces
96		*/
97		public function getFaces(): array {
98		return $this->faces;
99		}
100
101		/**
102		* @param array<Face> $faces Array of faces to set
103		*/
104		public function setFaces($faces) {
105		$this->faces = $faces;
106		}
107		}
108
109		/**
110		* Taks that get all images that are still not processed and processes them.
111		* Processing image means that each image is prepared, faces extracted form it,
112		* and for each found face - face descriptor is extracted.
113		*/
114		class ImageProcessingTask extends FaceRecognitionBackgroundTask {
115		/** @var ImageMapper Image mapper*/
116		protected $imageMapper;
117
118		/** @var FileService */
119		protected $fileService;
120
121		/** @var SettingsService */
122		protected $settingsService;
123
124		/** @var ModelManager */
125		protected $modelManager;
126
127		/** @var IModel */
128		private $model;
129
130		/** @var int\|null Maximum image area (cached, so it is not recalculated for each image) */
131		private $maxImageAreaCached;
132
133		/**
134		* @param ImageMapper $imageMapper Image mapper
135		* @param FileService $fileService
136		* @param SettingsService $settingsService
137		* @param ModelManager $modelManager Model manager
138		*/
139	1	public function __construct(ImageMapper $imageMapper,
140		FileService $fileService,
141		SettingsService $settingsService,
142		ModelManager $modelManager)
143		{
144	1	parent::__construct();
145
146	1	$this->imageMapper = $imageMapper;
147	1	$this->fileService = $fileService;
148	1	$this->settingsService = $settingsService;
149	1	$this->modelManager = $modelManager;
150
151	1	$this->model = null;
152	1	$this->maxImageAreaCached = null;
153	1	}
154
155		/**
156		* @inheritdoc
157		*/
158		public function description() {
159		return "Process all images to extract faces";
160		}
161
162		/**
163		* @inheritdoc
164		*/
165		public function execute(FaceRecognitionContext $context) {
166		$this->setContext($context);
167
168		$this->logInfo('NOTE: Starting face recognition. If you experience random crashes after this point, please look FAQ at https://github.com/matiasdelellis/facerecognition/wiki/FAQ');
169
170		// Get current model.
171		$modelVersion = $this->settingsService->getCurrentFaceModel();
172		$this->model = $this->modelManager->getModel($modelVersion);
173
174		// Open model.
175		$this->model->open();
176
177		$images = $context->propertyBag['images'];
178		foreach($images as $image) {
179		yield;
180
181		$startMillis = round(microtime(true) * 1000);
182
183		try {
184		$imageProcessingContext = $this->findFaces($this->model, $image);
185
186		if (($imageProcessingContext !== null) && ($imageProcessingContext->getSkipDetection() === false)) {
187		$this->populateDescriptors($this->model, $imageProcessingContext);
188		}
189
190		if ($imageProcessingContext === null) {
191		continue;
192		}
193
194		$endMillis = round(microtime(true) * 1000);
195		$duration = max($endMillis - $startMillis, 0);
196		$this->imageMapper->imageProcessed($image, $imageProcessingContext->getFaces(), $duration);
197		} catch (\Exception $e) {
198		if ($e->getMessage() === "std::bad_alloc") {
199		throw new \RuntimeException("Not enough memory to run face recognition! Please look FAQ at https://github.com/matiasdelellis/facerecognition/wiki/FAQ");
200		}
201		$this->logInfo('Faces found: 0. Image will be skipped because of the following error: ' . $e->getMessage());
202		$this->logDebug($e);
203		$this->imageMapper->imageProcessed($image, array(), 0, $e);
204		} finally {
205		$this->fileService->clean();
206		}
207		}
208
209		return true;
210		}
211
212		/**
213		* Given an image, it finds all faces on it.
214		* If image should be skipped, returns null.
215		* If there is any error, throws exception
216		*
217		* @param IModel $model Resnet model
218		* @param Image $image Image to find faces on
219		* @return ImageProcessingContext\|null Generated context that hold all information needed later for this image
220		*/
221		private function findFaces(IModel $model, Image $image) {
222		// todo: check if this hits I/O (database, disk...), consider having lazy caching to return user folder from user
223		$file = $this->fileService->getFileById($image->getFile(), $image->getUser());
224
225		if (empty($file)) {
226		// If we cannot find a file probably it was deleted out of our control and we must clean our tables.
227		$this->settingsService->setNeedRemoveStaleImages(true, $image->user);
228		$this->logInfo('File with ID ' . $image->file . ' doesn\'t exist anymore, skipping it');
229		return null;
230		}
231
232		$imagePath = $this->fileService->getLocalFile($file);
233
234		$this->logInfo('Processing image ' . $imagePath);
235		$imageProcessingContext = $this->prepareImage($imagePath);
236		if ($imageProcessingContext->getSkipDetection() === true) {
237		$this->logInfo('Faces found: 0 (image will be skipped because it is too small)');
238		return $imageProcessingContext;
239		}
240
241		// Detect faces from model
242		$facesFound = $model->detectFaces($imageProcessingContext->getTempPath());
243
244		// Convert from dictionary of faces to our Face Db Entity
245		$faces = array();
246		foreach ($facesFound as $faceFound) {
247		$face = Face::fromModel($image->getId(), $faceFound);
248		$face->normalizeSize($imageProcessingContext->getRatio());
249		$faces[] = $face;
250		}
251
252		$imageProcessingContext->setFaces($faces);
253		$this->logInfo('Faces found: ' . count($faces));
254
255		return $imageProcessingContext;
256		}
257
258		/**
259		* Given an image, it will rotate, scale and save image to temp location, ready to be consumed by pdlib.
260		*
261		* @param string $imagePath Path to image on disk
262		*
263		* @return ImageProcessingContext Generated context that hold all information needed later for this image.
264		*/
265		private function prepareImage(string $imagePath) {
266		$image = new OCP_Image(null, $this->context->logger->getLogger(), $this->context->config);
267		$image->loadFromFile($imagePath);
268		$image->fixOrientation();
269
270		if (!$image->valid()) {
271		throw new \RuntimeException("Image is not valid, probably cannot be loaded");
272		}
273
274		// Ignore processing of images that are not large enough.
275		$minImageSize = $this->settingsService->getMinimumImageSize();
276		if ((imagesx($image->resource()) < $minImageSize) \|\| (imagesy($image->resource()) < $minImageSize)) {
277		return new ImageProcessingContext($imagePath, "", -1, true);
278		}
279
280		$maxImageArea = $this->getMaxImageArea($this->model);
281		$ratio = $this->resizeImage($image, $maxImageArea);
282
283		$tempfile = $this->fileService->getTemporaryFile(pathinfo($imagePath, PATHINFO_EXTENSION));
284		$image->save($tempfile);
285
286		return new ImageProcessingContext($imagePath, $tempfile, $ratio, false);
287		}
288
289		/**
290		* Resizes the image to reach max image area, but preserving ratio.
291		* Stolen and adopted from OC_Image->resize() (difference is that this returns ratio of resize.)
292		*
293		* @param Image $image Image to resize
294		* @param int $maxImageArea The maximum size of image we can handle (in pixels^2).
295		*
296		* @return float Ratio of resize. 1 if there was no resize
297		*/
298	1	public function resizeImage(OCP_Image $image, int $maxImageArea): float {
299	1	if (!$image->valid()) {
300		$message = "Image is not valid, probably cannot be loaded";
301		$this->logInfo($message);
302		throw new \RuntimeException($message);
303		}
304
305	1	$widthOrig = imagesx($image->resource());
306	1	$heightOrig = imagesy($image->resource());
307	1	if (($widthOrig <= 0) \|\| ($heightOrig <= 0)) {
308		$message = "Image is having non-positive width or height, cannot continue";
309		$this->logInfo($message);
310		throw new \RuntimeException($message);
311		}
312
313	1	$areaRatio = $maxImageArea / ($widthOrig * $heightOrig);
314	1	$scaleFactor = sqrt($areaRatio);
315
316	1	$newWidth = intval(round($widthOrig * $scaleFactor));
317	1	$newHeight = intval(round($heightOrig * $scaleFactor));
318
319	1	$success = $image->preciseResize($newWidth, $newHeight);
320	1	if ($success === false) {
321		throw new \RuntimeException("Error during image resize");
322		}
323
324	1	$this->logDebug(sprintf('Image scaled from %dx%d to %dx%d (since max image area is %d pixels^2)',
325	1	$widthOrig, $heightOrig, $newWidth, $newHeight, $maxImageArea));
326
327	1	return 1 / $scaleFactor;
328		}
329
330		/**
331		* Gets all face descriptors in a given image processing context. Populates "descriptor" in array of faces.
332		*
333		* @param IModel $model Resnet model
334		* @param ImageProcessingContext Image processing context
335		*/
336		private function populateDescriptors(IModel $model, ImageProcessingContext $imageProcessingContext) {
337		$faces = $imageProcessingContext->getFaces();
338
339		foreach($faces as &$face) {
340		// For each face, we want to detect landmarks and compute descriptors.
341		// We use already resized image (from temp, used to detect faces) for this.
342		// (better would be to work with original image, but that will require
343		// another orientation fix and another save to the temp)
344		// But, since our face coordinates are already changed to align to original image,
345		// we need to fix them up to align them to temp image here.
346		$normalizedFace = clone $face;
347		$normalizedFace->normalizeSize(1.0 / $imageProcessingContext->getRatio());
348
349		// We are getting face landmarks from already prepared (temp) image (resized and with orienation fixed).
350		$landmarks = $model->detectLandmarks($imageProcessingContext->getTempPath(), array(
351		"left" => $normalizedFace->left, "top" => $normalizedFace->top,
352		"bottom" => $normalizedFace->bottom, "right" => $normalizedFace->right));
353		$face->landmarks = $landmarks['parts'];
354
355		$descriptor = $model->computeDescriptor($imageProcessingContext->getTempPath(), $landmarks);
356		$face->descriptor = $descriptor;
357		}
358		}
359
360		/**
361		* Obtains max image area lazily (from cache, or calculates it and puts it to cache)
362		*
363		* @param IModel $model Resnet model
364		* @return int Max image area (in pixels^2)
365		*/
366		private function getMaxImageArea(IModel $model): int {
367		if (!is_null($this->maxImageAreaCached)) {
368		return $this->maxImageAreaCached;
369		}
370
371		$this->maxImageAreaCached = $this->calculateMaxImageArea($model);
372		return $this->maxImageAreaCached;
373		}
374
375		/**
376		* Calculates max image area. This is separate function, as there are several levels of user overrides.
377		*
378		* @param IModel $model Resnet model
379		* @return int Max image area (in pixels^2)
380		*/
381		private function calculateMaxImageArea(IModel $model): int {
382		// First check if we are provided value from command line
383		//
384		if (
385		(array_key_exists('max_image_area', $this->context->propertyBag)) &&
386		(!is_null($this->context->propertyBag['max_image_area']))
387		) {
388		return $this->context->propertyBag['max_image_area'];
389		}
390
391		// Check if admin persisted this setting in config and it is valid value
392		//
393		$maxImageArea = $this->settingsService->getMaximumImageArea();
394		if ($maxImageArea > 0) {
395		return $maxImageArea;
396		}
397
398		// Calculate it from memory
399		//
400		$allowedMemory = $this->context->propertyBag['memory'];
401
402		// Based on amount on memory PHP have, we will determine maximum amount of image size that we need to scale to.
403		// This reasoning and calculations are all based on analysis given here:
404		// https://github.com/matiasdelellis/facerecognition/wiki/Performance-analysis-of-DLib%E2%80%99s-CNN-face-detection
405		$maxImageArea = intval(($allowedMemory) / $model->getMemoryAreaRelation()); // TODO: Maybe another helper.
406
407		return $maxImageArea;
408		}
409
410		}

matiasdelellis / facerecognition

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ImageProcessingTask::resizeImage() A

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