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Paul Kocialkowski authored
This introduces a new frame comparison method that was designed for patterns that follow a checkerboard style. These patterns are made of consecutive rectangular shapes with alternating solid colors. They are currently used for some Chamelium-based tests. The method is particularly adapted for cases where the edges of the shapes might be blurred (e.g. due to scaling), which makes it impossible to use pixel-perfect or CRC-based comparisons to decide whether the captured frame matches the reference. Overall, this test will first detect the edges of the pattern and later exclude them from comparison. Colors are compared between the reference and capture with a low threshold for error. A percentage of the faulty pixels is calculated and the captured frame is considered invalid if more than one percent of the pixels are erroneous. Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
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