Module geometry 

Functions

approx_poly_dp

Approximate polygon — exact port of CV.approxPolyDP from js-aruco2. This version handles CLOSED contours correctly using the circular indexing approach from the JS implementation.

clockwise_corners

Ensure candidate corners are in clockwise order. Port of AR.Detector.prototype.clockwiseCorners from JS.

count_non_zero

Count non-zero pixels in a rectangular region of a grayscale image. Port of CV.countNonZero from JS.

get_extreme_corner

Select the corner of a polygon that is most “extreme” in the given directions. Port of ArUcoScanner.prototype._getExtreme from JS. mode_x: true for max, false for min mode_y: true for max, false for min

is_contour_convex

min_edge_length

not_too_near

Filter out candidates that are too close to each other. Port of AR.Detector.prototype.notTooNear from JS.

perimeter

polygon_area

refine_corner

Refine a corner position using image gradients (sub-pixel precision). Port of ArUcoScanner.prototype._refineCorner from original JS engine.