WATCH THE CONTOUR-GAP TEST

Coloring Page Maker: Open Outline Test

See why a missing connection can remain open after tracing. The blue panel is an independent diagnostic, not a coloring function in the tool.

Read the method and measurements · Download MP4

Transcript

Why are coloring page outlines open? Check the source boundary before changing styles. In our controlled test, gaps of eight and twenty four pixels stayed open in all three presets. The tracer did not invent the missing connection. This is a test of our own current function, not a claim about every image.

We drew the same black rectangular border on three white six hundred by four hundred pixel inputs. The border width is five pixels. One input is closed; the other two have a small segment erased from the top. We ran Clean Outline, Detailed and Simplified, producing nine exact outputs.

We then ran an independent connectivity check. Pixels darker than gray one hundred twenty eight are barriers. Starting at the center, we mark connected white pixels blue. The closed trace kept the center separate from the corner. Both gapped traces allowed the blue region to reach the outside corner in every preset.

The blue panel is a diagnostic illustration, not a coloring feature inside the website. These results do not predict every bucket tool, its tolerance or its gap closing settings. Compare the original and trace, repair a missing connection in an editor if needed, and inspect the result before printing. All inputs, outputs and methods are linked in the article.