How to extract text with colored background

If you can't extract text with colored background, please add the Grayscale filter to the profiles param.

{
  'OCRImagePreprocessingFilters.AddGrayscale()': []
}

Applies to:

• pdf/convert/to/csv
• pdf/convert/to/json2
• pdf/convert/to/text
• pdf/convert/to/xls(x)
• pdf/convert/to/xml