Moving from a neutral point of view on data, photo selection should preserve this neutrality, observing the subject in its numerical quantity and not as a particular object. Avoiding personification and stage-setting, visuals are documenting the info.
Visuals and pattern
Continuing on the dot motive, a layer of the dot pattern is added to the photos.
Lighter photos have black pattern and darker photos have white dotted pattern.
BLACK PATTERN ON LIGHT IMAGE
WHITE PATTERN ON DARK IMAGE
Pattern with other components
Leave a safe area of 10px between element and pattern dots.