323 lines
14 KiB
Python
323 lines
14 KiB
Python
"""标注图层生成（透明底 RGBA PNG，仅标注、不含人物）。
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规格（技术方案 §6 + img1.png 版本5）：线/字色 #FFFFFF、透明底。
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- 字号/线宽/虚线/箭头尺寸全部按图片尺寸自适应缩放（大图也清晰）。
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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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- 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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中文字体用打包的思源黑体绝对路径加载，缺字体直接抛错（不静默降级成方块）。
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"""
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import os
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import numpy as np
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from PIL import Image, ImageDraw, ImageFont
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FONT_PATH = os.path.join(os.path.dirname(__file__), "fonts", "NotoSansCJKsc-Regular.otf")
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LINE_COLOR = (255, 255, 255, 255) # #FFFFFF 100%
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def _load_font(size):
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if not os.path.isfile(FONT_PATH):
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raise FileNotFoundError(f"中文字体缺失：{FONT_PATH}（请按 OFFLINE_ASSETS.md 放置）")
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return ImageFont.truetype(FONT_PATH, size)
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def draw_gradient_horizontal_line(buf, cx, cy, color=LINE_COLOR, half_length=None, width=1):
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"""在 RGBA numpy 缓冲 buf 上，以 (cx,cy) 为中心画向两侧渐变消失的水平线。"""
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h, w = buf.shape[:2]
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cy = int(round(cy)); cx = int(round(cx))
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half = half_length or (w // 3)
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xs = np.arange(w)
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dist = np.abs(xs - cx)
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alpha = np.clip(1.0 - dist / half, 0.0, 1.0) * color[3]
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mask = alpha > 0
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for off in range(-(width // 2), width - width // 2):
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y = cy + off
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if not (0 <= y < h):
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continue
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row = buf[y]
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row[mask, 0] = color[0]
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row[mask, 1] = color[1]
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row[mask, 2] = color[2]
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row[mask, 3] = np.maximum(row[mask, 3], alpha[mask].astype(np.uint8))
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def draw_gradient_vertical_line(buf, cx, y0, y1, color=LINE_COLOR, fade=None, width=1):
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"""在 RGBA numpy 缓冲 buf 上画一条竖线，两端渐变消失（中间实、上下淡）。"""
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h, w = buf.shape[:2]
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cx = int(round(cx))
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y0, y1 = int(round(y0)), int(round(y1))
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y0, y1 = max(0, min(y0, y1)), min(h - 1, max(y0, y1))
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if y1 <= y0:
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return
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ys = np.arange(y0, y1 + 1)
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span = y1 - y0
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fade = fade or max(1, span // 5) # 仅两端 ~1/5 段渐隐
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d = np.minimum(ys - y0, y1 - ys) # 到最近端点的距离
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alpha = np.clip(d / fade, 0.0, 1.0) * color[3]
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m = alpha > 0
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for off in range(-(width // 2), width - width // 2):
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x = cx + off
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if not (0 <= x < w):
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continue
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col = buf[y0:y1 + 1, x]
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col[m, 0] = color[0]
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col[m, 1] = color[1]
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col[m, 2] = color[2]
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col[m, 3] = np.maximum(col[m, 3], alpha[m].astype(np.uint8))
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def draw_dashed_line_with_arrows(draw, x1, y1, x2, y2, color=LINE_COLOR,
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dash_len=6, gap_len=4, arrow_size=5, width=1):
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"""两点间画稀疏虚线主干，两端用实心三角箭头（尖端精确落在端点，便于对齐）。
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虚线只画到「端点向内 arrow_len」处，箭头三角填补剩余，避免虚线穿出箭头。
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"""
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total = ((x2 - x1) ** 2 + (y2 - y1) ** 2) ** 0.5
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if total == 0:
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return
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dx = (x2 - x1) / total
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dy = (y2 - y1) / total
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nx, ny = -dy, dx # 法向量
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arrow_len = arrow_size * 2.0 # 三角沿线方向长度
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arrow_half = arrow_size # 三角底边半宽
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# 主干虚线：两端各留出 arrow_len 给箭头
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pos = arrow_len
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main_end = max(arrow_len, total - arrow_len)
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while pos < main_end:
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seg_end = min(pos + dash_len, main_end)
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draw.line([(x1 + dx * pos, y1 + dy * pos),
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(x1 + dx * seg_end, y1 + dy * seg_end)], fill=color, width=width)
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pos += dash_len + gap_len
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# 两端实心三角箭头：尖端=端点，底边在向内 arrow_len 处展开 ±arrow_half
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for (tipx, tipy, ix, iy) in [(x1, y1, dx, dy), (x2, y2, -dx, -dy)]:
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bx, by = tipx + ix * arrow_len, tipy + iy * arrow_len
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draw.polygon([(tipx, tipy),
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(bx + nx * arrow_half, by + ny * arrow_half),
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(bx - nx * arrow_half, by - ny * arrow_half)], fill=color)
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def _text_size(draw, text, font):
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bbox = draw.textbbox((0, 0), text, font=font)
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return bbox[2] - bbox[0], bbox[3] - bbox[1]
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_LINE_NAMES = {
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"hair_top": "头顶",
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"hairline": "发际线",
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"brow_center": "眉心",
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"nose_bottom": "鼻翼下缘",
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"chin_tip": "下巴尖",
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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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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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"""
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if hair_mask is None:
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return None, None
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m = np.asarray(hair_mask)
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if m.ndim == 3:
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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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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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def create_annotated_image(image_bgr, measure_result, hair_mask=None, 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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- 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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- 底部统一标「单位cm」。
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variant="v6"（接口6）：去掉头顶横线与顶庭（只画发际线/眉心/鼻翼下缘/下巴尖 4 条
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横线 + 上/中/下庭），竖线纵向范围改为发际线→下巴尖，且不画人头最左/最右端线
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（仅七眼 6 点 5 段，不取头部端）。
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"""
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h, w = image_bgr.shape[:2]
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v = measure_result.vertical
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pc = measure_result.px_per_cm
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# --- 自适应尺寸：字号/线宽/虚线/箭头按短边缩放 ---
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s = min(w, h)
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font_size = max(11, round(s * 0.026)) # 字体更小
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line_w = max(1, round(s * 0.0022))
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dash_len = max(4, round(s * 0.008))
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gap_len = max(2, round(dash_len * 0.7)) # 虚线更稠密（间隙<划线）
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arrow_size = max(2, round(s * 0.0045)) # 箭头更小
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pad = max(4, round(s * 0.012)) # 文字与线的间距
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line_h = font_size + max(2, round(font_size * 0.18))
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buf = np.zeros((h, w, 4), dtype=np.uint8)
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if variant == "v6":
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order = ["hairline", "brow_center", "nose_bottom", "chin_tip"]
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else:
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order = ["hair_top", "hairline", "brow_center", "nose_bottom", "chin_tip"]
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ys = [v[name][1] for name in order]
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pts = measure_result.eyes["points"]
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seven_keys = ["left_cheek", "left_outer", "left_inner",
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"right_inner", "right_outer", "right_cheek"]
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base_xs = [pts[k][0] for k in seven_keys]
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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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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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# 人脸/人头包围盒
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fx0, fx1 = xs[0], xs[-1]
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fy0, fy1 = ys[0], ys[-1]
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face_cx = (fx0 + fx1) / 2
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over = max(6, round(s * 0.030)) # 线超出包围盒的长度（参考图风格）
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face_half = (fx1 - fx0) / 2 + over # 横线超出最外侧竖线一点
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# v6 竖线纵向范围 = 发际线→下巴尖（不超出）；v1 = 头顶→下巴尖并两端超出一点
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v_top = fy0 if variant == "v6" else fy0 - over
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v_bot = fy1 if variant == "v6" else fy1 + over
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# --- 1. 横向分界线（渐变，覆盖头宽并超出一点） ---
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for cy in ys:
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draw_gradient_horizontal_line(buf, face_cx, cy, half_length=face_half, width=line_w)
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# --- 2. 纵向竖线（渐变，覆盖 v_top→v_bot） ---
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for vx in xs:
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draw_gradient_vertical_line(buf, vx, v_top, v_bot, width=line_w)
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canvas = Image.fromarray(buf, mode="RGBA")
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draw = ImageDraw.Draw(canvas)
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font = _load_font(font_size)
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# --- 3a. 横线右侧：线名（头顶/发际线/眉心/鼻翼下缘/下巴尖），文字在线上方 ---
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name_x = fx1 + pad
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name_gap = max(2, round(pad * 1.6)) # 文字底部到线的间距（再上移）
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for i, name in enumerate(order):
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text = _LINE_NAMES[name]
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tw, th = _text_size(draw, text, font)
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x = min(name_x, w - 2 - tw) # 右侧越界时回收
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draw.text((x, max(2, ys[i] - th - name_gap)), text, fill=LINE_COLOR, font=font)
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# --- 3b. 左侧四庭：名 + 数值两行（无 cm）+ 竖向虚线双箭头 ---
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if variant == "v6":
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court_cm = [measure_result.upper_cm, measure_result.middle_cm, measure_result.lower_cm]
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court_name = ["上庭", "中庭", "下庭"]
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n_court = 3
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else:
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court_cm = [measure_result.top_cm, measure_result.upper_cm,
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measure_result.middle_cm, measure_result.lower_cm]
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court_name = ["顶庭", "上庭", "中庭", "下庭"]
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n_court = 4
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arrow_x = max(arrow_size + 1, fx0 - pad) # 竖箭头所在 x（脸左侧，贴近最左竖线）
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for i in range(n_court):
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y_a, y_b = ys[i], ys[i + 1]
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# 竖向虚线双箭头，覆盖该庭高度（略收一点避免压到横线）
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inset = min(arrow_size, (y_b - y_a) * 0.12)
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draw_dashed_line_with_arrows(
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draw, arrow_x, y_a + inset, arrow_x, y_b - inset,
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dash_len=dash_len, gap_len=gap_len, arrow_size=arrow_size, width=line_w)
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# 名 + 数值两行，右对齐到箭头左侧
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name = court_name[i]
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val = f"{court_cm[i]:.2f}"
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nw, _ = _text_size(draw, name, font)
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vw, _ = _text_size(draw, val, font)
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label_right = arrow_x - pad
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y_mid = (y_a + y_b) / 2
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y_top = y_mid - line_h
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draw.text((max(2, label_right - nw), y_top), name, fill=LINE_COLOR, font=font)
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draw.text((max(2, label_right - vw), y_top + line_h), val, fill=LINE_COLOR, font=font)
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# --- 4. 七眼每段宽度：上下交替（上 3 / 下 4），横向虚线双箭头 + 数值（无 cm） ---
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# 文字与箭头间留更大间距，避免文字压住箭头
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txt_off = arrow_size + pad * 2
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y_arrow_top = max(txt_off + font_size + 2, fy0 - pad - arrow_size)
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y_arrow_bot = min(h - txt_off - font_size - 2, fy1 + pad + arrow_size)
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for i in range(len(xs) - 1):
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x_a, x_b = xs[i], xs[i + 1]
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if x_b - x_a < 1:
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continue
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seg_cm = (x_b - x_a) / pc
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cx_seg = (x_a + x_b) / 2
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text = f"{seg_cm:.2f}"
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tw, th = _text_size(draw, text, font)
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inset = min(arrow_size, (x_b - x_a) * 0.12)
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on_top = (i % 2 == 1) # 奇数段在上 → 上 3 / 下 4
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y_arrow = y_arrow_top if on_top else y_arrow_bot
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draw_dashed_line_with_arrows(
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draw, x_a + inset, y_arrow, x_b - inset, y_arrow,
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dash_len=dash_len, gap_len=gap_len, arrow_size=arrow_size, width=line_w)
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ty = (y_arrow - th - txt_off) if on_top else (y_arrow + txt_off)
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draw.text((cx_seg - tw / 2, ty), text, fill=LINE_COLOR, font=font)
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# --- 5. 底部统一单位 ---
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unit = "单位cm"
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uw, uh = _text_size(draw, unit, font)
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draw.text(((w - uw) / 2, h - uh - max(2, pad)), unit, fill=LINE_COLOR, font=font)
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return canvas
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if __name__ == "__main__":
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import sys
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import time
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import cv2
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from face_analysis.detector import detector
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from face_analysis.measure import measure_face
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path = sys.argv[1] if len(sys.argv) > 1 else "tests/fixtures/frontal.jpg"
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out = sys.argv[2] if len(sys.argv) > 2 else "tests/output/annotated.png"
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img = cv2.imread(path)
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if img is None:
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print(f"无法读取图片: {path}")
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sys.exit(1)
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h, w = img.shape[:2]
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lms = detector.detect(img)
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if lms is None:
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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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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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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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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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arr = np.asarray(canvas)
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print(f"saved {out} mode={canvas.mode} size={canvas.size} "
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f"transparent={bool((arr[:,:,3]==0).any())} opaque={bool((arr[:,:,3]>0).any())} "
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f"elapsed={dt*1000:.1f}ms")
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