[Flow] TYPO3.Imagine in TYPO3 Flow

[Patric Eckhart]

Okay thank you.
I have installed TYPO3.Media and add the viewhelper and following line:
{namespace media=TYPO3\Media\ViewHelpers}
<media:image asset="{f:uri.resource(resource: article.image)}" alt="Test" maximumWidth="200" maximumHeight="300" />

but i got this error:
Catchable Fatal Error: Argument 1 passed to TYPO3\Media\ViewHelpers\ImageViewHelper_Original::render() must be an instance of TYPO3\Media\Domain\Model\AssetInterface, string given in .....