private function motionBlur(array $params) {
        $this->checkRequiredParams($params, ['radius', 'sigma', 'angle']);

        $radius = (float) $params['radius'];
        $sigma = (float) $params['sigma'];
        $angle = (float) $params['angle'];

        try {
            $this->imagick->motionBlurImage($radius, $sigma, $angle);
        } catch (ImagickException $e) {
            throw new TransformationException($e->getMessage(), 400, $e);
        }

        $this->image->hasBeenTransformed(true);
    }