extracting matching efficiency

dear experts, we are using Sikuli to do some graphical tests on both Linux/Windows OS and it works nicely. Thanks for this great application.
Now, I would like to perform the following study, that I am doing in parallel directly with OpenCV. And I would like to compare the derived results.
Basically what I want to achieve is the following:
- degrade the image resolution/quality
- scan through the matching probability until template matching returns OK.
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Did someone by chance perform such a study, and if yes I would be grateful to have some feedback.
thanks in advance.