Difference

How two images of the same size differ (test-system-revamp §TSR-S-7, audit §TSR-Q-4.2).

In the namespace test::image. Declared in src/libs/libtest/test/ImageCompare.hpp.

Detailed description

A pixel differs when one of its compared channels moved by more than the tolerance of the comparison. Red, green and blue are compared, and alpha too when the comparison says Channels::Rgba.