title: Solr 6 fail to index images
body: <p>I'm trying to index images on SOLR, but I get the following error:</p>
  
  <p></p>
  
  <pre><code>ERROR: [doc=5b36cb2b78072e41] Error adding field 'media_black_point'='(0.012054443, 0.012496948, 0.010314941)' msg=For input string: "(0.012054443"
  </code></pre>
  
  <p></p>
  
  <p>It looks like it's a problem of field types, but these fields are extracted automatically. I'm forgetting some additional configuration?</p>
  
  <p>I appreciate all the help!</p>