feat: add remove bbox overlap

magic_pdf/pre_proc/remove_bbox_overlap.py

+from magic_pdf.libs.boxbase import _is_in_or_part_overlap, _is_in
+
+
+def _remove_overlap_between_bbox(spans):
+    res = []
+    for v in spans:
+        for i in range(len(res)):
+            if _is_in(res[i]["bbox"], v["bbox"]):
+                continue
+            if _is_in_or_part_overlap(res[i]["bbox"], v["bbox"]):
+                ix0, iy0, ix1, iy1 = res[i]["bbox"]
+                x0, y0, x1, y1 = v["bbox"]
+
+                diff_x = min(x1, ix1) - max(x0, ix0)
+                diff_y = min(y1, iy1) - max(y0, iy0)
+
+                if diff_x > diff_y:
+                    if x1 >= ix1:
+                        mid = (x0 + ix1) // 2
+                        ix1 = min(mid, ix1)
+                        x0 = max(mid + 1, x0)
+                    else:
+                        mid = (ix0 + x1) // 2
+                        ix0 = max(mid + 1, ix0)
+                        x1 = min(mid, x1)
+                else:
+                    if y1 >= iy1:
+                        mid = (y0 + iy1) // 2
+                        y0 = max(mid + 1, y0)
+                        iy1 = min(iy1, mid)
+                    else:
+                        mid = (iy0 + y1) // 2
+                        y1 = min(y1, mid)
+                        iy0 = max(mid + 1, iy0)
+                res[i]["bbox"] = [ix0, iy0, ix1, iy1]
+                v["bbox"] = [x0, y0, x1, y1]
+
+        res.append(v)
+    return res
+
+
+def remove_overlap_between_bbox(spans):
+    return _remove_overlap_between_bbox(spans)