Laravel Intervention Image Class - Class 'Image' not found

I'm trying to install intervention/image from composer, but after installation I get this error:

Class 'Image' not found

1: install via composer:

composer require intervention/image 

2: add to providers array:

'Intervention\Image\ImageServiceProvider' 

3: add to aliases array:

'Image' => 'Intervention\Image\Facades\Image'

4: update composer:

composer update

5: publish:

php artisan vendor:publish --provider="Intervention\Image\ImageServiceProviderLaravel5" 

public result:

Nothing to publish for tag [].

6: autoload:

composer dump-autoload

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