接口1: 标注图人头最左/最右竖线改用耳朵分割外缘
- 最左/最右竖线由「头发轮廓」改为同一 BiSeNet 的耳朵类(7/8)外缘, 看不到耳朵(被头发/侧脸遮挡→掩膜空)则该侧不画线 - 外耳轮廓常被误标成头发: 从耳朵外缘沿紧邻前景(耳∪发)按脸宽自适应 外扩回收(上限 face_w*0.045, 遇背景间隙即停) - 先按人脸包围盒裁剪再分割: BiSeNet 在紧裁人脸上训练, 整张全身/街拍图 脸偏小会严重欠分割、丢耳朵; 裁剪后映射回原图, 耳朵稳定可分 - segment_hair_and_ears() 单次推理同出 hair_mask + ear_mask Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
@@ -362,17 +362,24 @@ async def _face_measure_impl(image_file, image_url, image_base64, variant="v1"):
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return None, err(1003, "角度问题,请上传正面照")
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head_pose = estimate_head_pose(landmarks, w, h)
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# 7. 头发分割(方案 B),失败传 None 由 measure 内部回退方案 A
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# 7. 头发/耳朵分割(方案 B,单次推理),失败传 None 由 measure 内部回退方案 A。
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# 传人脸包围盒 → 先按人脸裁剪再分割(全身/街拍等脸偏小的图也能稳出耳朵)。
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hair_mask = None
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ear_mask = None
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try:
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from face_analysis.hair_segmenter import get_segmenter
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hair_mask = get_segmenter().segment_hair(image)
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from face_analysis.calibration import normalized_to_pixel
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pxs = [normalized_to_pixel(p, w, h) for p in landmarks.landmark]
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face_box = (min(p[0] for p in pxs), min(p[1] for p in pxs),
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max(p[0] for p in pxs), max(p[1] for p in pxs))
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hair_mask, ear_mask = get_segmenter().segment_hair_and_ears(image, face_box=face_box)
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except Exception as seg_e: # noqa: BLE001
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logger.warning("头发分割失败,回退方案A:%s", seg_e)
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logger.warning("头发/耳朵分割失败,回退方案A:%s", seg_e)
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# 8. 测量 + 标注图
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# 8. 测量 + 标注图(hair_mask 定发际线/头顶;ear_mask 定人头最左/最右竖线)
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result = measure_face(landmarks, hair_mask, w, h, head_pose=head_pose)
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annotated = create_annotated_image(image, result, hair_mask=hair_mask, variant=variant)
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annotated = create_annotated_image(
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image, result, ear_mask=ear_mask, hair_mask=hair_mask, variant=variant)
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buf = BytesIO()
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annotated.save(buf, format="PNG")
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+63
-23
@@ -5,6 +5,7 @@
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- 四庭水平分界线:numpy 向量化渐变消失(中间亮、两侧渐隐)。
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- 纵向竖线 8 条:人头最左 + 左脸颊/左眼外/内角/右眼内/外角/右脸颊 + 人头最右,
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把头宽切 7 段(七眼),段宽数值上下交替(上 3 / 下 4),带虚线双箭头。
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人头最左/最右取自耳朵分割外缘,看不到耳朵则省略该侧(最少 6 点 5 段)。
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- 四庭:图片左侧,「名」上「数值」下两行换行(不带 cm),带竖向虚线双箭头。
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- 五条横线右侧标名:头顶/发际线/眉心/鼻翼下缘/下巴尖。
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- 单位 cm 统一标在底部「单位cm」。
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@@ -116,38 +117,77 @@ _LINE_NAMES = {
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}
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def _head_edges_from_mask(hair_mask, y0, y1, left_cheek_x, right_cheek_x, min_gap):
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"""从头发分割掩膜取人头最左/最右 x(仅在脸纵向范围 [y0,y1] 内统计)。
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def _grow_outward(start_col, fg_band, direction, limit):
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"""从 start_col 沿 direction(+1 右 / -1 左) 在前景带 fg_band 内逐列外扩。
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返回 (head_left_x, head_right_x);某侧无掩膜/向内噪声,或离脸颊线过近
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(间距 < min_gap)则该侧为 None —— 即与脸颊线太近时只保留脸颊线。
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用于回收被误标成「头发」的外耳轮廓:耳朵被头发遮挡时,外耳轮廓那一圈常被
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分割并入头发类,故耳朵掩膜外缘会偏内。这里把外缘沿紧邻的前景(耳∪发)向外
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延伸,最多 limit 列;一旦下一列无前景(背景间隙)立即停止,绝不窜到分离的
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那缕头发上。返回外扩后的列号。
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"""
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if hair_mask is None:
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w = fg_band.shape[1]
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c = int(start_col)
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for _ in range(int(limit)):
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nc = c + direction
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if not (0 <= nc < w) or not fg_band[:, nc].any():
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break
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c = nc
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return c
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def _ear_edges_from_mask(ear_mask, hair_mask, y0, y1, left_cheek_x, right_cheek_x,
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face_center_x):
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"""从耳朵分割掩膜取人头最左/最右 x(仅在脸纵向范围 [y0,y1] 内统计)。
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左线 = 脸中线左侧耳朵像素的最左列;右线 = 右侧耳朵像素的最右列;再沿紧邻的
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前景(耳∪发)按脸宽自适应外扩,回收被误标成头发的外耳轮廓(见 _grow_outward)。
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某侧耳朵不可见(被头发/侧脸遮挡 → 掩膜为空),或外缘未越过对应脸颊线(非真实
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头宽边缘)时该侧返回 None —— 即「看不到耳朵就不画这条线」。
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"""
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if ear_mask is None:
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return None, None
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m = np.asarray(hair_mask)
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m = np.asarray(ear_mask)
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if m.ndim == 3:
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m = m[..., 0]
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m = m > 0
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h = m.shape[0]
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y0 = max(0, int(y0)); y1 = min(h - 1, int(y1))
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if y1 <= y0:
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return None, None
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band = m[y0:y1 + 1] > 0
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cols = np.where(band.any(axis=0))[0]
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ear_band = m[y0:y1 + 1]
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cols = np.where(ear_band.any(axis=0))[0]
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if cols.size == 0:
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return None, None
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hl, hr = float(cols.min()), float(cols.max())
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# 仅当确实在脸颊外侧、且与脸颊线间距足够大时才采用
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return (hl if (left_cheek_x - hl) >= min_gap else None,
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hr if (hr - right_cheek_x) >= min_gap else None)
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# 前景带 = 耳∪发(外耳轮廓常被误标为发),外扩上限按脸宽自适应
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fg_band = ear_band
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if hair_mask is not None:
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hm = np.asarray(hair_mask)
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if hm.ndim == 3:
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hm = hm[..., 0]
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fg_band = ear_band | (hm[y0:y1 + 1] > 0)
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grow = max(2, round(max(1.0, right_cheek_x - left_cheek_x) * 0.045))
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left_cols = cols[cols < face_center_x]
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right_cols = cols[cols > face_center_x]
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# 左/右耳外缘(外扩后),且必须在对应脸颊线外侧(否则视为残缺/噪声,只保留脸颊线)
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head_l = head_r = None
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if right_cols.size:
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edge = _grow_outward(right_cols.max(), fg_band, +1, grow)
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head_r = float(edge) if edge >= right_cheek_x else None
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if left_cols.size:
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edge = _grow_outward(left_cols.min(), fg_band, -1, grow)
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head_l = float(edge) if edge <= left_cheek_x else None
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return head_l, head_r
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def create_annotated_image(image_bgr, measure_result, hair_mask=None, variant="v1"):
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def create_annotated_image(image_bgr, measure_result, ear_mask=None, hair_mask=None,
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variant="v1"):
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"""生成标注图层 PNG(透明底 RGBA,尺寸同原图)。返回 PIL.Image。
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布局(对齐 img1.png 版本5):
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- 纵向竖线:人头最左 + 七眼 6 点 + 人头最右,切 7 段(七眼)。人头最左/最右
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取自头发分割掩膜的轮廓(方案 B);无掩膜(方案 A 兜底)时省略头部端线,
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只画 6 点 5 段。
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取自耳朵分割掩膜的外缘(方案 B,BiSeNet 类 7/8);耳朵不可见(被头发/侧脸
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遮挡 → 掩膜空)或无掩膜时省略该侧端线,只画对应脸颊线。
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- 横向 5 条分界线:头顶/发际线/眉心/鼻翼下缘/下巴尖,右侧标名。
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- 四庭(顶/上/中/下庭)在左侧:名 + 数值两行换行(无 cm),竖向虚线双箭头。
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- 七眼段宽数值上下交替(上 3 / 下 4,无 cm),横向虚线双箭头。
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@@ -186,12 +226,11 @@ def create_annotated_image(image_bgr, measure_result, hair_mask=None, variant="v
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if variant == "v6":
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xs = sorted(base_xs) # 接口6:仅七眼 6 点,不画人头最左/最右端线
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else:
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# 人头最左/最右:取自头发分割掩膜(方案B),脸纵向范围内统计;无掩膜则省略。
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# 与脸颊线间距 < 脸宽×8% 视为太近,只保留脸颊线(不画头部端线)。
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face_w = pts["right_cheek"][0] - pts["left_cheek"][0]
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min_gap = max(1.0, face_w * 0.08)
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head_l, head_r = _head_edges_from_mask(
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hair_mask, ys[0], ys[-1], pts["left_cheek"][0], pts["right_cheek"][0], min_gap)
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# 人头最左/最右:取自耳朵分割掩膜外缘(方案B,类7/8),脸纵向范围内统计。
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# 看不到耳朵(被头发/侧脸遮挡 → 掩膜空)或外缘未越过脸颊线则省略该侧端线。
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lcx, rcx = pts["left_cheek"][0], pts["right_cheek"][0]
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head_l, head_r = _ear_edges_from_mask(
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ear_mask, hair_mask, ys[0], ys[-1], lcx, rcx, (lcx + rcx) / 2)
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head_xs = [x for x in (head_l, head_r) if x is not None]
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xs = sorted(base_xs + head_xs) # 自左向右(6 或 7/8 点)
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@@ -304,15 +343,16 @@ if __name__ == "__main__":
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print("未检出人脸")
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sys.exit(1)
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mask = None
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ears = None
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try:
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from face_analysis.hair_segmenter import get_segmenter
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mask = get_segmenter().segment_hair(img)
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mask, ears = get_segmenter().segment_hair_and_ears(img)
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except Exception as e: # noqa: BLE001
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print(f"[warn] 分割不可用,回退方案 A:{e}")
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result = measure_face(lms, mask, w, h)
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t0 = time.time()
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canvas = create_annotated_image(img, result, hair_mask=mask)
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canvas = create_annotated_image(img, result, ear_mask=ears, hair_mask=mask)
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dt = time.time() - t0
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os.makedirs(os.path.dirname(out), exist_ok=True)
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canvas.save(out)
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@@ -1,7 +1,8 @@
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"""方案 B:BiSeNet 头发分割 + 发际线/头顶定位。
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"""方案 B:BiSeNet 头发/耳朵分割 + 发际线/头顶定位。
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加载 face-parsing BiSeNet(19 类,hair=17),对整图做像素级语义分割得到头发
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mask,再沿面部中轴线扫描得到真实发际线与头顶。GPU 可用时走 CUDA,否则 CPU。
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加载 face-parsing BiSeNet(CelebAMask-HQ 19 类,hair=17、l_ear=7、r_ear=8),对整图
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做像素级语义分割:得到头发 mask 用于沿面部中轴线扫描真实发际线与头顶,并得到耳朵
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mask 供标注图取人头最左/最右竖线(耳朵外缘)。GPU 可用时走 CUDA,否则 CPU。
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单例加载权重,避免每请求重载。详见技术方案 §1.4 / §4.0。
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"""
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import os
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@@ -15,6 +16,7 @@ import numpy as np
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_WEIGHTS = os.path.join(os.path.dirname(__file__), "weights", "79999_iter.pth")
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HAIR_CLASS = 17 # CelebAMask-HQ 19 类中 hair 的索引
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EAR_CLASSES = (7, 8) # 7=l_ear / 8=r_ear(类名以人为参照,图像左右另行判定,不依赖类名)
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N_CLASSES = 19
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_INPUT_SIZE = 512 # BiSeNet 推理输入边长
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@@ -59,8 +61,8 @@ class HairSegmenter:
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transforms.Normalize((0.485, 0.456, 0.406), (0.229, 0.224, 0.225)),
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])
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def segment_hair(self, image_bgr):
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"""返回 hair_mask(H×W bool,True=头发),尺寸同输入原图。"""
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def _parse(self, image_bgr):
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"""整图语义分割,返回原图尺寸的类别图(H×W int,值为 0–18 类别号)。"""
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torch = self._torch
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h, w = image_bgr.shape[:2]
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rgb = cv2.cvtColor(image_bgr, cv2.COLOR_BGR2RGB)
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@@ -70,10 +72,49 @@ class HairSegmenter:
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with torch.no_grad():
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out = self.net(inp)[0] # 主输出 (1, C, 512, 512)
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parsing = out.squeeze(0).argmax(0).cpu().numpy() # (512, 512) 类别图
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hair_small = (parsing == HAIR_CLASS).astype(np.uint8)
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# 还原到原图尺寸(最近邻保持类别边界)
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hair_mask = cv2.resize(hair_small, (w, h), interpolation=cv2.INTER_NEAREST)
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return hair_mask.astype(bool)
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return cv2.resize(parsing.astype(np.int32), (w, h),
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interpolation=cv2.INTER_NEAREST)
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def segment_hair(self, image_bgr):
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"""返回 hair_mask(H×W bool,True=头发),尺寸同输入原图。"""
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return self._parse(image_bgr) == HAIR_CLASS
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def _parse_face_cropped(self, image_bgr, face_box):
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"""按人脸框裁剪后再分割,结果映射回原图尺寸(裁剪外填背景 0)。
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BiSeNet 在 CelebAMask-HQ「紧裁对齐人脸」上训练,整张大场景图(全身/街拍,
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脸只占一小块、背景复杂)会严重欠分割、丢耳朵。先按人脸放大裁剪,让脸接近
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训练分布,耳朵/头发分割明显更稳。裁剪含足够上/侧边距以纳入发顶与双耳。
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"""
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h, w = image_bgr.shape[:2]
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x0, y0, x1, y1 = face_box
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fw, fh = max(1.0, x1 - x0), max(1.0, y1 - y0)
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cx0 = int(max(0, x0 - fw * 0.8)); cx1 = int(min(w, x1 + fw * 0.8))
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cy0 = int(max(0, y0 - fh * 1.0)); cy1 = int(min(h, y1 + fh * 0.5))
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if cx1 - cx0 < 2 or cy1 - cy0 < 2:
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return self._parse(image_bgr)
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full = np.zeros((h, w), dtype=np.int32)
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full[cy0:cy1, cx0:cx1] = self._parse(image_bgr[cy0:cy1, cx0:cx1])
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return full
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def segment_hair_and_ears(self, image_bgr, face_box=None):
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"""单次推理返回 (hair_mask, ear_mask),均为 H×W bool,尺寸同原图。
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ear_mask = 左耳(7) ∪ 右耳(8);耳朵被头发/侧脸遮挡时对应区域天然为空,
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正好用于「看不到耳朵就不画线」的判定。两类合并、左右按图像位置另判,
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不依赖以人为参照的类名(详见 EAR_CLASSES 注释)。
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face_box=(x0,y0,x1,y1)(人脸关键点包围盒像素坐标)给定时先按人脸裁剪再
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分割(见 _parse_face_cropped),整张大场景图也能稳定分出耳朵;不给则整图分割。
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"""
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if face_box is None:
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parsing = self._parse(image_bgr)
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else:
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parsing = self._parse_face_cropped(image_bgr, face_box)
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hair_mask = parsing == HAIR_CLASS
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ear_mask = np.isin(parsing, EAR_CLASSES)
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return hair_mask, ear_mask
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_segmenter = None
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