Mailingliste - Einträge 2006

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Re: [qftestJUI] gamma values in PNG images

  • Subject: Re: [qftestJUI] gamma values in PNG images
  • From: Gregor Schmid <Gregor.Schmid@?.de>
  • Date: 15 Jun 2006 20:48:28 +0200

Hello Krishna,

qftestJUI's image checks compare the RGB values pixel by pixel without
any tolerance. This works well for things like icons, but is indeed
fragile in other cases. 

What kinds of images are you checking?

If you have good arguments and know a free, simple, efficient!
algorithm for tolerant comparison we could probably add it to some
future release.

Best regards,

"Krishna Chaitanya" <krishna.chaitanya@?.com> writes:

>    Hi,
>    We're seeing image comparison failures for the same image when the
>    source image is from a different OS platform. Does the image capture
>    in qftestJUI involve gamma correction for controlling cross-platform
>    image brightness? Does qftestJUI have any other mechanism to nullify
>    cross-platform differences in images? Alternatively, is there a way I
>    can specify the image match percentage that's acceptable to me to
>    declare a Pass?
>    Thanks,
>    Krishna

Gregor Schmid                                Gregor.Schmid@?.de
Quality First Software GmbH           
Tulpenstr. 41                                Tel: +49 8171 919870
DE-82538 Geretsried                          Fax: +49 8171 919876