Fountain：semantic mask → boundary-refined mask

clean route; no transient mask

clean route; no transient mask

SAM 已覆盖右缘可见人物与手提袋，5px 可安全包住裁切边界。

人物、四肢和手提袋边界完整，5px 已有充分余量。

右缘人物及黑色随身物均被正确分割，5px 足够。

近景人物与大背包轮廓完整，5px 能覆盖衣物和包缘。

左缘近景人物、背包与手提袋轮廓完整，5px 足够。

SAM 明显外溢到雕塑和喷泉静态区域，17px 只会扩大错误，需语义修复。

SAM 主要落在树干/背景碎片而非人物，17px 仍无法覆盖完整人物与随身物。

裁切人物和手提袋语义完整，5px 已覆盖边缘。

近景人物、背包与下缘肢体均完整，5px 足够。

人物、背包、手提物和鞋部均被覆盖，5px 是最小安全半径。

SAM 仅覆盖躯干，头部等明显组件缺失，17px 仍不能可靠补全。

SAM 只抓到背包和手提物碎片，人物头身缺失，膨胀至 17px 仍不足。

主行人与后方小行人均被正确分割，5px 可覆盖所有可见边缘。

主行人、黑色随身物及左缘次要人物均完整，5px 足够。

主行人与远景小行人的语义轮廓均正确，5px 已安全覆盖。

人物、背包、手提物和左缘小组件均已覆盖，5px 足够。

clean route; no transient mask

clean route; no transient mask

人物、大背包及手中黑色物件完整，5px 是最小安全选择。

被喷泉部分遮挡的可见人物与背包均完整，5px 足够。

遮挡使背包、衣物和腿部分离，13px 才能以最小安全余量连贯覆盖全部可见组件。

喷泉后方人物的全部可见区域均被正确分割，5px 足够。

主行人正确，但右侧次要目标被错分成花坛/背景块，17px 不能修复语义目标。

主行人正确，但棚下次要目标对应的 SAM 落在背景花坛，需重新做语义分割。

人物、双腿与手提袋边界完整，5px 足够。

人物和黑色手提袋分割完整，5px 已覆盖衣物边缘。

行人、背包、手提袋和跨步肢体均完整，5px 足够。

两名人物及主人物随身物均正确覆盖，5px 已安全。

两名被部分遮挡的人物均有完整可见轮廓，5px 足够。

SAM 大面积误分喷泉、地面和背景，仅部分命中人物，17px 无法挽救。

喷泉后方可见头身与背包均被覆盖，5px 足够。

雕塑后方人物、背包及分离的小手部组件均已覆盖，5px 足够。

车辆旁远景小行人轮廓紧致完整，5px 已提供必要安全边界。

主行人、手提袋及其后方人物均正确分割，5px 足够。

左右两名行人与随身物边缘完整，5px 是最小安全选择。

道路旁行人及背包轮廓完整，5px 足够。

雕塑遮挡后的可见人物、背包及手部均被覆盖，5px 足够。

左缘人物及道路旁两名人物均正确覆盖，5px 足够。

左右两名行人与主人物背包均完整，5px 足够。

两名行人、背包与手提物均完整，5px 已安全覆盖。

右缘裁切人物的可见轮廓完整，5px 足够。

上缘近景人物与远景人物均分割正确，5px 足够。

两名上缘裁切人物及可见随身物均已覆盖，5px 足够。

人物和黑色手提袋轮廓完整，5px 足够。

人物、背包及被喷泉遮挡的下缘均正确覆盖，5px 足够。

人物与左手黑色手提袋均落在候选范围内，5px 已安全。

人物与黑色手提袋均正确分割，5px 已覆盖边缘。

上缘裁切人物和置于喷泉边的手提物均完整，5px 足够。

clean route; no transient mask

远景行人的头身和四肢轮廓完整，5px 足够。

clean route; no transient mask

右缘仅可见的人物及随身物均正确覆盖，5px 足够。

SAM already covers the complete visible person silhouette; 5 px is the smallest safe crop margin.

Body, clothing, and carried items are covered at 5 px without unnecessary expansion.

The clipped person boundary is complete and 5 px safely covers the visible edge.

clean route; no transient mask

Person, backpack, and small side item are safely enclosed by the 5 px candidate.

The full visible person and belongings are cleanly covered at 5 px.

The person and carried bag are already safely covered by the 5 px expansion.

SAM omits most of the carried black bag, and even 17 px cannot recover the full bag interior.

The person and thin held-item/hand boundary remain safely inside the 5 px crop.

Person and bag are fully represented; 5 px is sufficient.

A large semantic hole remains over the bundled black bag even after 17 px dilation.

Smaller radii leave a visible hole in the bag; 17 px is the first candidate that closes it.

All visible person and accessory boundaries are safely covered at 5 px.

Both people and the foreground backpack are safely covered by the 5 px candidate.

SAM 将人物头部与后方白色车辆连成一体，属于静态背景误并，需重做语义分割。

clean route; no transient mask

clean route; no transient mask

The small clipped person fragment and bag are fully enclosed at 5 px.

clean route; no transient mask

The carried bag retains holes at 5, 9, and 13 px; 17 px is the smallest safe candidate.

The clipped person and backpack are complete with a safe 5 px margin.

Person, backpack, and carried bag are covered at 5 px.

The 5 px candidate closes minor backpack texture gaps and preserves the full silhouette.

The tiny left-edge person/backpack fragment is safely covered at 5 px.

The clipped left-edge person is complete at the smallest radius.

Person, backpack, bag, and feet are safely covered by 5 px.

SAM misses a substantial central portion of the large carried bag; 17 px still leaves it uncovered.

clean route; no transient mask

clean route; no transient mask

clean route; no transient mask

clean route; no transient mask

clean route; no transient mask

The severely top-clipped visible person fragment is safely enclosed at 5 px.

The background person, backpack, and bag are complete at 5 px.

The detached black handbag is semantically omitted and remains substantially uncovered at 17 px.

The handbag is incomplete at 5 and 9 px; 13 px is the first candidate that safely covers it.

The person and low carried bag are fully covered at 5 px.

The person, backpack, and bag are safely represented at the smallest radius.

左上缘仅可见的双腿被正确分割，5px 足够覆盖裁切边界。

clean route; no transient mask

The foreground black bag remains a semantic hole even at 17 px; the background people are otherwise covered.

The foreground carried bag is missing from SAM and remains uncovered after 17 px expansion.

Foreground and all three background pedestrians are safely covered at 5 px.

上缘露出的行人与深色随身物均被紧致覆盖，5px 足够。

All visible pedestrians and the foreground carried item are safely enclosed at 5 px.

The foreground black bag is absent from the semantic mask and cannot be recovered by 17 px dilation.

All visible pedestrian groups are covered at 5 px despite overlap.

The three pedestrians, including the backpack, are safely covered at 5 px.

The three overlapping pedestrians are fully represented by the 5 px candidate.

两处远景人物的可见碎片均被正确定位，5px 已是安全且不过宽的选择。

两名被雕塑遮挡的行人可见部分均正确覆盖，5px 足够。

clean route; no transient mask

The foreground black bag remains omitted even at 17 px; both cyclists are otherwise covered.

The person, carried bag, and cyclist are all safely covered at 5 px.

clean route; no transient mask

The small top-clipped person fragment behind the sculpture is complete at 5 px.

The right-edge bag/arm fragment is safely enclosed by the 5 px candidate.

The black bag has residual gaps at smaller radii; 13 px is the first safe compact choice.

人物、背包、手提物及跨步双腿均完整，5px 足够。

喷泉后人物、背包及下缘随身物组件均被覆盖，5px 是最小安全半径。

上缘裁切的人物下身与手提袋完整，5px 足够。

人物、背包与左手黑色随身物轮廓完整，5px 足够。

喷泉后方人物与手提物完整，5px 已安全覆盖。

人物及背包语义边界正确，5px 足够。

人物与黑色手提物均完整，5px 是最小安全选择。

clean route; no transient mask

clean route; no transient mask

人物、背包及被喷泉遮挡的下缘均正确覆盖，5px 足够。

人物和左手黑色随身物轮廓完整，5px 足够。

水管遮挡两侧的人物与手提物组件均正确覆盖，5px 足够。

人物、手提物及步态肢体边缘完整，5px 足够。

右侧人物、背包和水管旁手提物均在候选外轮廓内，5px 已足够。

上缘可见双腿轮廓完整，5px 足够。

树前人物的头身、背包和喷泉上沿以上可见区域完整，5px 足够。

树旁被喷泉遮挡人物及背包均完整，5px 足够。

人物、背包与分离的黑色随身物小组件均被覆盖，5px 足够。

人物、大背包、胸前黑色物件和双腿均完整，5px 足够。

人物、背包及黑色随身物碎片均被正确定位，5px 已覆盖。

水管后方人物、背包与肩部随身物边界完整，5px 足够。

clean route; no transient mask

上缘裁切人物的全部可见区域均完整，5px 足够。

clean route; no transient mask

喷泉后人物及头顶黑色随身物轮廓完整，5px 足够。

背向人物、背包与头顶黑色随身物均完整，5px 足够。

clean route; no transient mask

上缘裁切人物及背包的全部可见部分均被覆盖，5px 足够。

人物与头顶黑色随身物在水管两侧的分离组件均被覆盖，5px 足够。

The SAM mask covers the full visible person, including shoes and carried items; 5 px provides a sufficient boundary margin.

上缘人物与背包语义完整，5px 已有安全边界。

Both visible person fragments around the statue are semantically captured, and 5 px safely covers their exposed boundaries.

Only the head and small upper-body fragment are visible, and the 5 px candidate fully covers them.

The clipped person and visible carried-item fragment at the left border are covered with adequate margin at 5 px.

The person and dark garment or bag are complete in the SAM mask; 5 px is the smallest safe dilation.

The dark carried garment contains residual interior gaps at 5 and 9 px; 13 px is the first candidate that safely closes them.

The backpack lies mostly just outside the raw person contour; 17 px is required to absorb its visible outer edge.

The large black bag is omitted and part of the static fountain pipe is included; even 17 px cannot correct these semantic errors.

The visible upper body and carried item are fully enclosed, so the 5 px boundary is sufficient.

The person, raised arm, and visible backpack edge are all captured with a safe 5 px margin.

The partially cropped person at the top edge is fully covered by the 5 px candidate.

clean route; no transient mask

The foreground person and raised handheld item are represented as complete visible components at 5 px.

Multiple people are detected, but the foreground dark bag or garment retains substantial uncovered holes even after 17 px dilation.

The small distant person is semantically complete and safely covered by the 5 px candidate.

喷泉后方人物的可见上身及随身物均正确分割，5px 足够。

The upper body and the object held to the right are fully enclosed with the 5 px margin.

clean route; no transient mask

The small visible person and dark camera or garment around the face are captured sufficiently at 5 px.

The person and raised dark item form a complete mask, with 5 px providing adequate edge coverage.

The exposed upper body, bent arm, and clothing boundaries are all safely covered at 5 px.

clean route; no transient mask

The full standing person, shoes, and carried garment are complete in the mask; 5 px is sufficient.

clean route; no transient mask

The cropped foreground person and large dark garment are already fully represented, requiring only a 5 px margin.

The visible upper body is cleanly segmented and fully covered by the 5 px candidate.