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Text fragments after word exclusion are indistinguishable from arrows and icons via contour metrics. Since the goal is detecting graphics, images, boxes and colors (not arrows/icons), simplify to only: - circle/balloon (circularity > 0.55 — very reliable) - illustration (area > 3000 — clearly non-text) Boxes and colors are handled by cv_box_detect and cv_color_detect. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>