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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body bgcolor="#ffffff" text="#000099"> Hi Robert, thanks for the tip. Works like a charm! Might be interesting to add it to the manual. For info, the class that needs to be specified in resolvers.addImageComparison must match with the one used for registering the ItemResolver. Let's remain to implement this resolver ;-) Cheers, Denis. On 14/09/2010 5:23 PM, Robert Lahmer, QFS support wrote: <blockquote cite="mid:C062DF61565C8BCA4D51F51B@D674CC06F27B528C319A4859" type="cite"> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <meta name="Generator" content="MS Exchange Server version 08.02.0231.000"> <title>Re: [QF-Test] How to implement a custom ImageComparator</title>  Hello Denis, I remember having had an RMI problem with the ImageComparator too. I also found a workaround, but I'm not sure whether it applies to your situation where you try to use it inside a custom checker. However, instead of using the ImageComparator interface, it's probably easier to implement an ImageComparison resolver like so: def compareImages(expected, actual, width, height): # if comparison is not ok: # return "Bad image" return None # ok resolvers.addImageComparison("myImageComp", compareImages, "mypck.MyImageComponent") If you want to go back to the default image comparison for components of class "MyImageComponent", just remove the resolver in another 'SUT script': resolvers.removeResolver("myImageComp") Best regards, Robert --On Montag, September 13, 2010 18:31:41 +1000 "Gauthier, Denis" <a class="moz-txt-link-rfc2396E" href="mailto:Denis.Gauthier@thalesgroup.com.au"><Denis.Gauthier@thalesgroup.com.au></a> wrote: > Hi everyone, > > did anyone ever tried (and managed) to implement a custom ImageComparator? > > I am trying to follow the 'Image API Extensions' guide but without much > success. > > Basically in a custom Checker interface (in Python) I do the following: > > ...... > ...... > def getCheckData(self, canvas, item, checkType): > if checkType.getDataType() == CheckDataType.IMAGE > iw = ImageWrapper(None) > image = iw.grabScreenshot(x, y, w, h) # x,y,w,h are defined at > that point image.setComparator( MyImageComparator() ) > return ImageCheckData(checkType.getIdentifier(), image, > 0,0,0,0,w,h) return None > > class SymbolComparator(ImageComparator): > def equals(self, actual, expected): ># Actual implementation to be done > return True > > > (I skipped all the import statements). > > This code works well without the image.setComparator( ...) statement. > Setting this custom ImageComparator generates me an error when recording > an 'Image Check' through QFTest. I have a huge exception about the > SymbolComparator class that cannot be serialized. > > I tried to write the same code in Java and to stick the jar file in the > plugin/sut folder, same result. Making this class implementing the > java.io.Serializable does not help either as this time this is a RMI > exception that is thrown java.rmi.ServerException ==> > ClassNotFoundException > > Is there any further steps that are required? Does this class need to be > copied somewhere else? Can't we just do it in pure Python? > Is there any example available? > > Thanks for your help as I really need to get my own image comparison code > .... > > Denis. > > > > DISCLAIMER:-------------------------------------------------------------- > ------------- This e-mail transmission and any documents, files and > previous e-mail messages attached to it are private and confidential. > They may contain proprietary or copyright material or information that is > subject to legal professional privilege. They are for the use of the > intended recipient only. Any unauthorised viewing, use, disclosure, > copying, alteration, storage or distribution of, or reliance on, this > message is strictly prohibited. No part may be reproduced, adapted or > transmitted without the written permission of the owner. If you have > received this transmission in error, or are not an authorised recipient, > please immediately notify the sender by return email, delete this message > and all copies from your e-mail system, and destroy any printed copies. > Receipt by anyone other than the intended recipient should not be deemed a > waiver of any privilege or protection. Thales Australia does not warrant > or represent that this e-mail or any documents, files and previous e-mail > messages attached are error or virus free. > ------------------------------------------------------------------------- > ------------- > -- QFS Support - Robert Lahmer Quality First Software GmbH <a moz-do-not-send="true" href="http://www.qfs.de">http://www.qfs.de</a> Tulpenstr. 41 Tel: +49 8171 38648-20 DE-82538 Geretsried Fax: +49 8171 38648-16 GF: Gregor Schmid, Karlheinz Kellerer HRB München 140833 </blockquote> DISCLAIMER:--------------------------------------------------------------------------- This e-mail transmission and any documents, files and previous e-mail messages attached to it are private and confidential. They may contain proprietary or copyright material or information that is subject to legal professional privilege. They are for the use of the intended recipient only. Any unauthorised viewing, use, disclosure, copying, alteration, storage or distribution of, or reliance on, this message is strictly prohibited. No part may be reproduced, adapted or transmitted without the written permission of the owner. If you have received this transmission in error, or are not an authorised recipient, please immediately notify the sender by return email, delete this message and all copies from your e-mail system, and destroy any printed copies. Receipt by anyone other than the intended recipient should not be deemed a waiver of any privilege or protection. Thales Australia does not warrant or represent that this e-mail or any documents, files and previous e-mail messages attached are error or virus free. -------------------------------------------------------------------------------------- </body> </html>