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The Invoice Number field is to the right of its name, on the same horizontal level. On some images the number is poorly recognized, so do not restrict the alphabet. Instead, restrict the search area and restrict the string length to 3-20 characters.

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Create the InvoiceNumber element

1

Create the Character String element

In the InvoiceHeader element, create a Character String element and name it InvoiceNumber.
The element and the block that corresponds to the InvoiceNumber field need not have identical names, but matching names are handy when working with the FlexiLayout.
2

Remove the alphabet restriction

Click the Character String tab. Set Percentage of non-alphabet characters to 100%, which removes any restriction on characters.
3

Set the character count

In the Character count field, specify this fuzzy interval: {-1, 3, 20, INF}. This restricts the string length; assume 3 to 20 characters. Any hypothesis outside this range is penalized.
4

Set the search constraints

Click the Relations tab. InvoiceNumber occurs only to the right of the kwInvoiceNumber name keywords, no farther than 550 dots from their right boundary, and always on the same level. Set these constraints:
  • Right of the kwInvoiceNumber element, Offset = 0
  • Left of the kwInvoiceNumber element, Offset = -550, Reference boundary = Right
  • Above the kwInvoiceNumber element, Offset = -10, Reference boundary = Bottom
  • Below the kwInvoiceNumber element, Offset = -10, Reference boundary = Top
Offset values are selected by trial and error.
5

Verify the match

Match the FlexiLayout with the test images and confirm that FlexiLayout Studio detects the element on all the images where applicable.
6

Set the block source element

To describe the location of the InvoiceNumber block, open its Properties, select Source element, click Browse button, and select the InvoiceNumber element as the source element.