Hi,
note for all users which already use Robotmk and the ImageHorizonLibrary to automate non-web UIs:
I have created a new pull request for this library which will make it possible to pre-process both the reference and screenshot image with “canny edge detection”. Before images are compared they are cleared up by any noise, artifacts, color deviations etc.
Added value: Solve the Reference image could not be found - problem which can be painful to solve. With edge detection, tests are getting more robust against adversities with 3rd party data, RDP/Citrix image compression etc.
I would be very happy if you could test this.
Btw, this is also the green light signal 
for the Robotmk Blog where I will write about the usage of Robot Framework for synthetic e2e monitoring with Checkmk and Robotmk. 
There you’ll find the first blog post “Edge detection for the ImageHorizonLibrary” which also explains how to install this beta feature.
(Nobody leaves without leaving a comment 
)
Best regards,
Simon
