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视觉代码python/armor_detector.py
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223
视觉代码python/armor_detector.py
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import cv2
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import numpy as np
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from 新建文件夹.config import (
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HORIZONTAL_ANGLE_THRESHOLD, NEARBY_LIGHT_BAR_THRESHOLD,
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LIGHT_BAR_IOU_THRESHOLD, ARMOR_DISTANCE_RATIO_RANGE,
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ARMOR_LENGTH_DIFF_RATIO, ARMOR_ANGLE_DIFF_THRESHOLD
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)
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class ArmorDetector:
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"""装甲板检测类：灯条提取、配对"""
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def __init__(self):
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self.angle_threshold_rad = np.radians(HORIZONTAL_ANGLE_THRESHOLD)
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def _extract_initial_light_bars(self, mask):
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"""从掩码中提取初始灯条（轮廓+最小外接矩形）"""
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contours, _ = cv2.findContours(mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
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initial_light_bars = []
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for contour in contours:
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rect = cv2.minAreaRect(contour)
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box = cv2.boxPoints(rect) # 获取矩形四个顶点
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if len(box) == 0: # 确保顶点数有效
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continue
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box = np.int32(box) # 转为int32（OpenCV要求的类型）
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(x, y), (w, h), angle = rect
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contour_area = cv2.contourArea(contour)
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rect_area = w * h
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# 筛选：面积足够 + 填充度高
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if rect_area > 30 and (contour_area / rect_area if rect_area > 0 else 0) > 0.4:
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initial_light_bars.append({"rect": rect, "box": box, "area": rect_area})
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return initial_light_bars
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def _merge_nearby_light_bars(self, initial_light_bars):
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"""合并临近灯条（避免同一灯条被拆分）"""
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processed_boxes = []
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visited = [False] * len(initial_light_bars)
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for i in range(len(initial_light_bars)):
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if visited[i]:
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continue
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nearby_indices = [i]
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(x1, y1), _, _ = initial_light_bars[i]["rect"]
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for j in range(i + 1, len(initial_light_bars)):
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if visited[j]:
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continue
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(x2, y2), _, _ = initial_light_bars[j]["rect"]
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distance = np.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2)
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# 距离+IOU筛选
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if distance < NEARBY_LIGHT_BAR_THRESHOLD:
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box_i = initial_light_bars[i]["box"]
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box_j = initial_light_bars[j]["box"]
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if len(box_i) == 0 or len(box_j) == 0:
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continue
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b1 = cv2.boundingRect(box_i)
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b2 = cv2.boundingRect(box_j)
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inter_area = self._calculate_iou(b1, b2)
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if inter_area > LIGHT_BAR_IOU_THRESHOLD:
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nearby_indices.append(j)
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visited[j] = True
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# 合并临近灯条的顶点，生成新矩形
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all_valid_points = []
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for k in nearby_indices:
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box_k = initial_light_bars[k]["box"]
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if len(box_k) > 0:
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all_valid_points.append(box_k)
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if not all_valid_points:
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continue
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all_points = np.vstack(all_valid_points)
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merged_rect = cv2.minAreaRect(all_points)
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merged_box = np.int32(cv2.boxPoints(merged_rect)) # 转为int32
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processed_boxes.append(merged_box)
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visited[i] = True
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return processed_boxes
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def _calculate_iou(self, b1, b2):
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"""计算两个bounding box的IOU"""
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b1 = [b1[0], b1[1], b1[0] + b1[2], b1[1] + b1[3]]
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b2 = [b2[0], b2[1], b2[0] + b2[2], b2[1] + b2[3]]
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inter_x1 = max(b1[0], b2[0])
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inter_y1 = max(b1[1], b2[1])
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inter_x2 = min(b1[2], b2[2])
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inter_y2 = min(b1[3], b2[3])
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if inter_x1 >= inter_x2 or inter_y1 >= inter_y2:
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return 0.0
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inter_area = (inter_x2 - inter_x1) * (inter_y2 - inter_y1)
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b1_area = (b1[2] - b1[0]) * (b1[3] - b1[1])
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b2_area = (b2[2] - b2[0]) * (b2[3] - b2[1])
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union_area = b1_area + b2_area - inter_area
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return inter_area / union_area if union_area > 0 else 0.0
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def _filter_valid_light_bars(self, processed_boxes):
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"""筛选有效灯条（排除水平灯条）"""
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valid_light_bars = []
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for box in processed_boxes:
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if len(box) == 0:
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continue
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rect = cv2.minAreaRect(box)
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(x, y), (w, h), angle = rect
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length = w if w > h else h
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width = h if w > h else w
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main_angle = angle if w > h else angle + 90
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main_angle = main_angle % 180
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if main_angle > 90:
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main_angle -= 180
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main_angle_rad = np.radians(main_angle)
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center = (x, y)
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end1 = (
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center[0] + (length / 2) * np.cos(main_angle_rad),
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center[1] + (length / 2) * np.sin(main_angle_rad)
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)
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end2 = (
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center[0] - (length / 2) * np.cos(main_angle_rad),
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center[1] - (length / 2) * np.sin(main_angle_rad)
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)
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rect_area = length * width
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contour_area = cv2.contourArea(box)
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area_ratio = contour_area / rect_area if rect_area > 0 else 0
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# 筛选：面积足够 + 填充度高 + 非水平
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if (rect_area > 40 and area_ratio > 0.4 and
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abs(main_angle_rad) > self.angle_threshold_rad):
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valid_light_bars.append({
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"center": center,
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"size": (length, width),
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"angle": main_angle,
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"angle_rad": main_angle_rad,
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"area": rect_area,
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"center_line": [end1, end2],
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"center_line_length": length,
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"box": box
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})
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return valid_light_bars
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def _pair_light_bars_to_armor(self, light_bars, target_color):
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"""灯条配对为装甲板（按置信度排序）"""
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armor_plates = []
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used_indices = set()
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for i in range(len(light_bars)):
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if i in used_indices:
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continue
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lb1 = light_bars[i]
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for j in range(i + 1, len(light_bars)):
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if j in used_indices:
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continue
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lb2 = light_bars[j]
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# 角度差异筛选
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angle_diff = abs(lb1["angle_rad"] - lb2["angle_rad"])
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angle_diff = min(angle_diff, 2 * np.pi - angle_diff)
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if angle_diff > ARMOR_ANGLE_DIFF_THRESHOLD:
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continue
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# 距离比例筛选
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dx = lb2["center"][0] - lb1["center"][0]
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dy = lb2["center"][1] - lb1["center"][1]
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distance = np.sqrt(dx ** 2 + dy ** 2)
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avg_length = (lb1["center_line_length"] + lb2["center_line_length"]) / 2
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distance_ratio = distance / avg_length
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if not (ARMOR_DISTANCE_RATIO_RANGE[0] < distance_ratio < ARMOR_DISTANCE_RATIO_RANGE[1]):
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continue
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# 长度差异筛选
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length_diff_ratio = abs(lb1["center_line_length"] - lb2["center_line_length"]) / avg_length
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if length_diff_ratio > ARMOR_LENGTH_DIFF_RATIO:
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continue
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armor_center = (
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(lb1["center"][0] + lb2["center"][0]) / 2,
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(lb1["center"][1] + lb2["center"][1]) / 2
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)
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confidence = (lb1["area"] + lb2["area"]) / (distance + 1)
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armor_plates.append({
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"color": target_color,
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"center": armor_center,
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"confidence": confidence,
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"pair": (lb1, lb2),
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"corners_2d": None
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})
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used_indices.add(i)
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used_indices.add(j)
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break
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return sorted(armor_plates, key=lambda x: x["confidence"], reverse=True)
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def detect(self, mask, target_color):
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"""完整检测流程：灯条提取→合并→筛选→配对→3D估计"""
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initial_light_bars = self._extract_initial_light_bars(mask)
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if not initial_light_bars:
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return [], []
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processed_boxes = self._merge_nearby_light_bars(initial_light_bars)
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if not processed_boxes:
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return [], []
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valid_light_bars = self._filter_valid_light_bars(processed_boxes)
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if len(valid_light_bars) < 2:
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return valid_light_bars, []
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armor_plates = self._pair_light_bars_to_armor(valid_light_bars, target_color)
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if not armor_plates:
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return valid_light_bars, []
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return valid_light_bars, armor_plates
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