Use Onenote to OCR from an image that contains text

 Some tools can convert a pdf document to editable text. But if the pdf document was made from an image (e.g. a picture taken of a book page with a mobile phone), the conversion may not work. 

In this regard, Google Keep is doing a marvellous job. 

But for desktop work, so far, Onenote's OCR capability is still the best; and it's totally free. 

Just copy or insert an image (containing text) into a page inside Onenote. Then right-click, and choose "Copy text from picture". There you are!