RIA Sensitivity

When creating an EveryStep Web Recorder script you may—on occasion—be presented with a warning that states: “Selected image has several similar copies. Press ‘Reselect’ if you want to select another image or select ‘Raise’ if you want to raise the sensitivity threshold.” 

Sometimes, after an area of the page or an image has been selected, RIA Image Validation may prompt you with a warn about similar copies of the referenced area or image you have selected. 

As the matching mechanism relies on a coefficient of coincidence based on a pixel-by-pixel comparison, there are two possible ways to resolve this issue: 

Reselect the image: This will replace the initially selected image or area with another, more unique image or area. 

Raise the sensitivity threshold: Raising the threshold of the coefficient of coincidence will filter out similar objects by decreasing degree of acceptable divergence. Note that this may not help resolve the issue in instances in which the differences between two images or areas are minor. 

Change RIA Image Sensitivity 

To change the RIA Image Sensitivity, select PictureAssert from within the script that corresponds to the image or area for which you wish to adjust the RIA Image Sensitivity. 

This will open the PictureAssert working pane to the right of your script. 

Within the PictureAssert working pane you can adjust the Threshold. 

The Threshold is typically set by default between 0.95 and 0.98. This is the decimal equivalent of the percentage of accuracy or sensitivity of RIA Image Validation. In other words, 98% of the pixels in the area or image you have selected as part of the script would have to match that of what was found during monitoring/testing for the image to be validated. 

The reason an RIA Image is not, by default, validated at 100% pixel-to-pixel matching is to account for differences between the environment in which the script was created and the environment in which the script is run. This accounts for disparities in: monitors, video/graphics hardware, and resolution settings. 

After changing the  Threshold, you will be prompted to Save Changes. Simply select the Save Change button at the bottom of the PictureAssert working pane and the EveryStep Web Recorder will  allow you to continue working with your script.