[ADD] accounting: doc about OCR (#585)

accounting/payables/supplier_bills.rst

@@ -9,3 +9,4 @@ Vendor Bills
    supplier_bills/bills_or_receipts
    supplier_bills/deferred_expenses
    supplier_bills/assets
+   supplier_bills/ocr

accounting/payables/supplier_bills/ocr.rst

@@ -0,0 +1,38 @@
+==============================================================
+Digitize Vendor Bills with Optical Character Recognition (OCR)
+==============================================================
+
+Encoding bills manually can be a time-consuming task. Having a solution that allows you to digitize
+them and automatically import the data to your database reduces errors and saves you time.
+
+Set up the feature
+==================
+
+Go to :menuselection:`Accounting --> Settings --> Bill Digitalization`, and choose whether the bills
+should be processed automatically or manually.
+
+.. image:: media/setup_ocr.png
+   :align: center
+   :alt: Activate the feature going to the settings application in Odoo Accounting
+
+Start digitizing your bills
+---------------------------
+
+Scan your bills and then go to :menuselection:`Accounting --> Vendors --> Bills` and upload your
+document. Based on your configuration, it either processes the documents automatically, or you
+need to click on *Send for Digitalization* to do it manually.
+
+.. tip::
+   You can also create a vendor bill through the *Documents* app or by using an email alias on your
+   journals.
+
+Once the data is extracted from the PDF, you can correct it if necessary by clicking on the
+respective tag (available in *Edit* mode), and selecting the right information instead.
+
+.. image:: media/example_ocr.png
+   :align: center
+   :height: 580
+   :alt: Example of a scanned bill in Odoo Accounting
+
+.. note::
+   The more bills you scan, the better the system gets at identifying the correct data.