Question / Problem:
The PDF has some color fields that are very hard to read once converted. Can any changes be made so it can be read?
Answer / Solution:
To use OCR you must convert the image to black and white only. When you convert colour or grey scale image to binary image, based on threshold, documents where colours are darker than 50% grey equivalent will be black and the lighter shades will be white.
There is no adjustments setting for this. Also there is no way to optimize this.