WATCH THE LINE-SPACING TEST

Coloring Page Maker: Do Narrow Gaps Stay White?

Watch four controlled source gaps and twelve actual tracing outputs. No tested gap closed completely; source gap width and output white width are different measurements.

Watch on YouTube · Download MP4 · Read the complete method and download the evidence

Transcript

Do narrow gaps stay white in a coloring page maker? In our controlled line spacing test, all four gaps kept some white space. But the source gap width and the white width in the traced output were not always equal. These results apply to our test fixtures, not to every photo.

We drew two vertical black bars, each five pixels wide, on a white six hundred by four hundred pixel canvas. We changed only the white interval between them: one, two, four, or twelve pixels. We ran the unchanged production tracing function with Clean Outline, Detailed, and Simplified, producing twelve outputs.

At the middle row, we counted pixels with gray values at least two hundred fifty inside the original gap. Source gaps of one, two, four, and twelve pixels retained one, two, two, and ten nearly white columns. All three presets agreed. No tested gap closed completely, so this experiment does not show merging.

A one pixel gap surviving does not establish a universal safe minimum. We did not test diagonal edges, resizing, photos, paper placement, or printers. Compare the exact important space in your own original and trace. Keep line spacing separate from missing contour segments and from the two edges of one thick stroke. Download the inputs and outputs to inspect the evidence.