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Three Circled Points With a Scale Bar

Annotated daytime photo of a crowded outdoor event under a canopy reading PROVE ME WRONG, with three yellow circles and arrows and a black and white ruler overlay at the bottom

What This Image Shows

A bright daylight photograph of the outdoor event, taken from the crowd. The white canopy valance reads PROVE ME WRONG twice with a lightning bolt between, white 47 caps sit on the merchandise table, a PA speaker stands at the left, and the crowd fills the foreground behind metal barricades. Three yellow circles with matching arrows have been added, and a black-and-white measurement bar numbered 0 to 10 is superimposed at the lower right.

The scale bar is what distinguishes this from the other circled-detail images in the cluster. Adding a ruler is an attempt to move from pointing at something to measuring it — the three circled points can be given a spacing, and a spacing plus an assumed frame rate gives a speed. That is the same calculation the three-specks post in this cluster performs in prose.

Whether the measurement means anything depends entirely on whether the ruler is correctly scaled to the depth plane the circled points sit in, which a flat overlay on a perspective photograph cannot guarantee. The related posts are the three-specks question and the frame-order argument. The event set-up itself is documented at Tent and AV Team Mic Setup.

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