sikuli-driver team mailing list archive

[RaiMan <rmhdevelop@xxxxxx>]

** Summary changed:

- Sikuli X 1.0rc1 - Inconsistency in text recognition and matching, especially with integers-as-text!
+ X 1.0rc1 - Inconsistency in text recognition and matching, especially with integers-as-text!

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https://bugs.launchpad.net/bugs/695616

Title:
  X 1.0rc1 - Inconsistency in text recognition and matching, especially
  with integers-as-text!

Status in Sikuli:
  New

Bug description:
  I have noticed inconsistency in the Sikuli X text recognition and
  matching, especially when text on the screen/region are integers.
  Below are the steps to reproduce the problem scenario:

  Step1: In your web browser open 'TextOnTheScreen.png' from the
  following web-link (http://qoydkw.bay.livefilestore.com
  /y1pSr0oDju9ndvMzJJfo_qWD2qEvMdDDwoKquMNWWkUYAxgrsVcXmETY8yW_LqIieOKXgwlTt8yxe8eQDY-
  SCySCFljo59mSSIC/TextOnTheScreen.png?psid=1)

  Step2: To the below sikuli script, provide region coordinates of the 'TextOnTheScreen.png' image which is on your web browser. Note! region coordinates must be significantly bigger because you will zoom-in & zoom-out of the visible content on your browser in-order to carry-out multiple text recognition tests.
  --------------------------------------------------------
  r = Region(“TextOnTheScreen”)
  t1 = "534438"
  t2 = "534177"
  t3 = "4438"
  t = t2
  m = r.exists(t,0)
  if m:
  if m.text() == t:
   popup("Exact match")
  else:
   popup(m.nearby().text())
  else:
  popup("Nothing found at all!")
  --------------------------------------------------------

  Step3(TestCase1): Now, run the above sikuli script with t = t2. You might notice one or more of the following:
  - Integers such as 7 & 8 are incorrectly recognised
  - All the integers-as-text are recognised correctly
  - Only few integers are recognised correctly

  Questions: 
  - Does the text recognition depend on how much OCR gets trained? 
  - Does the font-type & font-size matter? 
  - Should there be a mechanism for validating an exact-match for text recognition?

  Step4(TestCase2): Now, back to your browser where the
  'TextOnTheScreen.png' image is visible. Try to zoom-out (ctrl&-) the
  image and run the above sikuli script with t = t2. You should now
  notice variation in the text recognition results.

  Step5(TestCase3): Repeat 'TestCase2' with different zoom-levels in
  your browser, you might get varied text recognisation results.

  Step6(TestCase4): Now, run the above sikuli script with t = t3. You
  might notice that integers-as-text are not recognised at all or with
  luck it might recognise some integers-as-text?

  Hope this provide some test-cases for troubleshooting inconsistency in
  text/integer recognition.

  Questions:
  - Should text and integer recognition be independent operations? Should there be a choice for the application developer if she/he wants to combine and/or isolate such operations where-seen-fit? Would such separation lead to reduced-OCR-complexity/accuracy/better-control over the OCR?
  - How would one reliably obtain an exact string match for e.g. with click("String") operation?