Classes/Utility/ImageUtility.php
protected static function getVirtualFileObject($fileName, array $metadata)
    {
        /** @var \TYPO3\CMS\Core\Resource\ResourceFactory $resourceFactory */
        $resourceFactory = GeneralUtility::makeInstance(\TYPO3\CMS\Core\Resource\ResourceFactory::class);

        $recordData = [
            'uid' => 0,
            'pid' => 0,
            'name' => 'Temporary Upload Storage',
            'description' => 'Internal storage, mounting the temporary PHP upload directory.',
            'driver' => 'Local',
            'processingfolder' => '',
            // legacy code
            'configuration' => '',
            'is_online' => true,
            'is_browsable' => false,
            'is_public' => false,
            'is_writable' => false,
            'is_default' => false,
        ];
        $storageConfiguration = [
            'basePath' => PathUtility::dirname($fileName),
            'pathType' => 'absolute'
        ];

        $virtualStorage = $resourceFactory->createStorageObject($recordData, $storageConfiguration);
        $name = PathUtility::basename($fileName);
        $extension = strtolower(substr($name, strrpos($name, '.') + 1));

        /** @var \TYPO3\CMS\Core\Resource\File $virtualFileObject */
        $virtualFileObject = GeneralUtility::makeInstance(
            \TYPO3\CMS\Core\Resource\File::class,
            [
                'identifier' => '/' . $name,
                'name' => $name,
                'extension' => $extension,
            ],
            $virtualStorage,
            $metadata
        );

        return $virtualFileObject;
    }
protected static function getVirtualFileObject($fileName, array $metadata)
    {
        /** @var \TYPO3\CMS\Core\Resource\ResourceFactory $resourceFactory */
        $resourceFactory = GeneralUtility::makeInstance(\TYPO3\CMS\Core\Resource\ResourceFactory::class);

        $recordData = [
            'uid' => 0,
            'pid' => 0,
            'name' => 'Temporary Upload Storage',
            'description' => 'Internal storage, mounting the temporary PHP upload directory.',
            'driver' => 'Local',
            'processingfolder' => '',
            // legacy code
            'configuration' => '',
            'is_online' => true,
            'is_browsable' => false,
            'is_public' => false,
            'is_writable' => false,
            'is_default' => false,
        ];
        $storageConfiguration = [
            'basePath' => PathUtility::dirname($fileName),
            'pathType' => 'absolute'
        ];

        $virtualStorage = $resourceFactory->createStorageObject($recordData, $storageConfiguration);
        $name = PathUtility::basename($fileName);
        $extension = strtolower(substr($name, strrpos($name, '.') + 1));

        /** @var \TYPO3\CMS\Core\Resource\File $virtualFileObject */
        $virtualFileObject = GeneralUtility::makeInstance(
            \TYPO3\CMS\Core\Resource\File::class,
            [
                'identifier' => '/' . $name,
                'name' => $name,
                'extension' => $extension,
            ],
            $virtualStorage,
            $metadata
        );

        return $virtualFileObject;
    }
Creates a virtual File object to be used transparently by external
metadata extraction services as if it would come from standard FAL.

@param string $fileName
@param array $metadata
@return \TYPO3\CMS\Core\Resource\File