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README.md
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README.md
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# 木条检测与分类 Python 接口示例
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本项目提供完整的 Python 示例,用于图像中木条数量检测、存在性判定以及 NG 木条异常分类。
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它支持:
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- 基于 RKNNLite 的木条检测
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- NG/OK 木条判定
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- NG 木条异常类型分类
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- 简单接口调用,支持本地图片推理
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---
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## 目录结构
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wood_detection/
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├── wood_detect/
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│ ├── wood_detect.py # 木条数量检测接口
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│ └── wood_detect.rknn # RKNN模型文件
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├── wood_exist/
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│ ├── wood_exist.py # 木条存在性判定接口
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│ └── wood_exist_cls.rknn # RKNN模型文件
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├── wood_ng/
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│ ├── wood_ng.py # NG木条异常分类接口
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│ └── wood_ng_cls.rknn # RKNN模型文件
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└── README.md # 说明文档
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---
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## 配置
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### 安装依赖
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```bash
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pip install opencv-python numpy rknnlite
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```
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## 接口说明
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### 1. 木条数量检测
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函数:detect_wood(img: np.ndarray) -> int
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参数:
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img:BGR格式图像 (np.ndarray)
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返回值:
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检测到的木条数量 (int)
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示例:
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#### 函数调用
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```python
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import cv2
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from wood_detect.wood_detect import detect_wood
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img = cv2.imread("1.jpg")
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result = detect_wood(img)
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print(f"检测到木条数量: {result}")
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```
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### 2. 木条存在性判定
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函数:classify_wood_exist(img: np.ndarray) -> int
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参数:
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img:BGR格式图像 (np.ndarray)
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返回值:
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整数结果,对应木条状态(int: 存在结果(0 / 1))
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示例:
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```python
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import cv2
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from wood_exist.wood_exist import classify_wood_exist, CLASS_NAMES
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img = cv2.imread("1.png")
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result = classify_wood_exist(img)
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print(f"木条存在性判定: {result}")
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```
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### 3. NG 木条异常分类
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函数:classify_wood_ng(img: np.ndarray) -> int
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参数:
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img:BGR格式图像 (np.ndarray)
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返回值:
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整数结果,对应 NG木条(int: NG结果(0 / 1))
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示例:
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```python
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import cv2
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from wood_ng.wood_ng import classify_wood_ng, CLASS_NAMES
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img = cv2.imread("1.png")
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result = classify_wood_ng(img)
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print(f"NG 木条: {result}")
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```
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BIN
wood_detect/1.jpg
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wood_detect/1.jpg
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wood_detect/wood_detect.py
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wood_detect/wood_detect.py
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# -*- coding: utf-8 -*-
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"""
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木条检测模块(基于RKNNLite + ROI + 单类别NMS)
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功能:
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- 检测ROI区域内木条数量
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- 输出实际木条数量
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"""
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import os
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from typing import Optional
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import cv2
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import numpy as np
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from rknnlite.api import RKNNLite
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# =====================================================
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# 常量配置
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# =====================================================
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RKNN_MODEL_PATH: str = "wood_detect.rknn"
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ROI: tuple[int, int, int, int] = (1, 1, 1000, 1000) # ROI 坐标(x1, y1, x2, y2)
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IMG_SIZE: tuple[int, int] = (640, 640) # 模型输入大小
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OBJ_THRESH: float = 0.25 # 置信度阈值
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NMS_THRESH: float = 0.45 # NMS阈值
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CLASS_NAME: list[str] = ["bag"] # 单类别名称,后续改成wood
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# =====================================================
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# 私有工具函数
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# =====================================================
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def _softmax(x: np.ndarray, axis: int = -1) -> np.ndarray:
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"""计算softmax概率"""
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x = x - np.max(x, axis=axis, keepdims=True)
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exp_x = np.exp(x)
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return exp_x / np.sum(exp_x, axis=axis, keepdims=True)
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def _letterbox_resize(image: np.ndarray,
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size: tuple[int, int],
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bg_color: int = 114) -> tuple[np.ndarray, float, int, int]:
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"""保持长宽比缩放并填充到目标尺寸"""
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target_w, target_h = size
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h, w = image.shape[:2]
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scale = min(target_w / w, target_h / h)
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new_w, new_h = int(w * scale), int(h * scale)
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resized = cv2.resize(image, (new_w, new_h))
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canvas = np.full((target_h, target_w, 3), bg_color, dtype=np.uint8)
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dx = (target_w - new_w) // 2
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dy = (target_h - new_h) // 2
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canvas[dy:dy + new_h, dx:dx + new_w] = resized
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return canvas, scale, dx, dy
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def _nms(boxes: np.ndarray, scores: np.ndarray, thresh: float) -> list[int]:
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"""非极大值抑制"""
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x1, y1, x2, y2 = boxes.T
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areas = (x2 - x1) * (y2 - y1)
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order = scores.argsort()[::-1]
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keep: list[int] = []
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while order.size > 0:
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i = order[0]
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keep.append(i)
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xx1 = np.maximum(x1[i], x1[order[1:]])
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yy1 = np.maximum(y1[i], y1[order[1:]])
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xx2 = np.minimum(x2[i], x2[order[1:]])
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yy2 = np.minimum(y2[i], y2[order[1:]])
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inter = np.maximum(0, xx2 - xx1) * np.maximum(0, yy2 - yy1)
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iou = inter / (areas[i] + areas[order[1:]] - inter)
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order = order[1:][iou <= thresh]
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return keep
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def _post_process(outputs: list[np.ndarray],
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scale: float,
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dx: int,
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dy: int) -> Optional[np.ndarray]:
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"""RKNN模型输出后处理:解码坐标 + NMS,返回有效boxes"""
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boxes_list, scores_list = [], []
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strides = [8, 16, 32]
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for i, stride in enumerate(strides):
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reg = outputs[i * 3 + 0][0]
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cls = outputs[i * 3 + 1][0]
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obj = outputs[i * 3 + 2][0]
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num_classes, H, W = cls.shape
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reg_max = reg.shape[0] // 4
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grid_y, grid_x = np.meshgrid(np.arange(H), np.arange(W), indexing="ij")
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grid_x = grid_x.astype(np.float32).ravel()
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grid_y = grid_y.astype(np.float32).ravel()
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cls_flat = cls.reshape(num_classes, -1).T
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obj_flat = obj.ravel()
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max_cls_score = np.max(cls_flat, axis=1)
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scores = max_cls_score * obj_flat
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valid_mask = scores >= OBJ_THRESH
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if not np.any(valid_mask):
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continue
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valid_idx = np.where(valid_mask)[0]
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scores_v = scores[valid_idx]
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gx = grid_x[valid_idx]
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gy = grid_y[valid_idx]
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reg_valid = reg.reshape(4, reg_max, -1)[:, :, valid_idx]
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reg_softmax = _softmax(reg_valid, axis=1)
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acc = np.arange(reg_max, dtype=np.float32).reshape(1, -1, 1)
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distance = np.sum(reg_softmax * acc, axis=1)
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cx = (gx + 0.5) * stride
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cy = (gy + 0.5) * stride
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l, t, r, b = distance[0], distance[1], distance[2], distance[3]
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x1 = cx - l * stride
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y1 = cy - t * stride
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x2 = cx + r * stride
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y2 = cy + b * stride
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boxes = np.stack([x1, y1, x2, y2], axis=1)
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boxes[:, [0, 2]] = (boxes[:, [0, 2]] - dx) / scale
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boxes[:, [1, 3]] = (boxes[:, [1, 3]] - dy) / scale
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boxes_list.append(boxes)
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scores_list.append(scores_v)
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if not boxes_list:
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return None
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boxes_all = np.concatenate(boxes_list, axis=0)
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scores_all = np.concatenate(scores_list, axis=0)
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keep_idx = _nms(boxes_all, scores_all, NMS_THRESH)
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return boxes_all[keep_idx]
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# =====================================================
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# RKNN模型全局初始化
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# =====================================================
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_global_rknn = RKNNLite()
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_global_rknn.load_rknn(RKNN_MODEL_PATH)
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_global_rknn.init_runtime()
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# =====================================================
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# 木条检测类
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# =====================================================
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class WoodDetectorRKNN:
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"""基于RKNN的木条检测器"""
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def __init__(self):
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"""初始化木条检测器"""
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self.rknn = _global_rknn
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def detect(self, img_np: np.ndarray) -> int:
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"""
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检测木条数量
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Args:
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img_np (np.ndarray): 原始BGR图像
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Returns:
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int: 检测到的木条数量
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"""
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# ROI裁剪
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h, w = img_np.shape[:2]
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x1, y1, x2, y2 = ROI
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x1 = max(0, min(x1, w - 1))
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x2 = max(0, min(x2, w))
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y1 = max(0, min(y1, h - 1))
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y2 = max(0, min(y2, h))
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roi_img = img_np[y1:y2, x1:x2]
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# letterbox resize
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resized_img, scale, dx, dy = _letterbox_resize(roi_img, IMG_SIZE)
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# 推理
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input_tensor = np.expand_dims(resized_img.astype(np.float32), axis=0)
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outputs = self.rknn.inference([input_tensor])
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boxes = _post_process(outputs, scale, dx, dy)
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if boxes is None:
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return 0
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return len(boxes)
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# =====================================================
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# 对外统一接口
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# =====================================================
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_detector = WoodDetectorRKNN()
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def detect_wood(img_np: np.ndarray) -> int:
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"""
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对外木条检测接口(返回木条数量)
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Args:
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img_np (np.ndarray): 原始BGR图像
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Returns:
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int: 检测到的木条数量
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"""
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return _detector.detect(img_np)
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# =====================================================
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# 主程序入口
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# =====================================================
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if __name__ == "__main__":
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img_path = "1.jpg"
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if not os.path.exists(img_path):
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raise FileNotFoundError(f"图片不存在: {img_path}")
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img = cv2.imread(img_path)
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if img is None:
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raise ValueError("图像加载失败")
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total_count = detect_wood(img)
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print(f"检测到木条数量: {total_count}")
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BIN
wood_detect/wood_detect.rknn
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wood_detect/wood_detect.rknn
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wood_exist/1.png
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wood_exist/1.png
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wood_exist/wood_exist.py
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wood_exist/wood_exist.py
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# -*- coding: utf-8 -*-
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"""
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ROI RKNN 图像分类模块
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基于 RKNNLite 对输入图像的指定 ROI 区域进行分类,
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输出类别 ID(0: 异常,1: 正常)。
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支持:
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- RKNN 模型单例加载
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- ROI 裁剪与缩放
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- BGR → RGB 预处理
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- 主程序测试入口
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"""
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import os
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from typing import Dict
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import cv2
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import numpy as np
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from rknnlite.api import RKNNLite
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# =====================================================
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# 全局配置(常量)
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# =====================================================
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RKNN_MODEL_PATH: str = "wood_exist_cls.rknn"
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# ROI 坐标:x1, y1, x2, y2(像素坐标)
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ROI: tuple[int, int, int, int] = (3, 0, 694, 182)
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CLASS_NAMES: Dict[int, str] = {
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0: "异常",
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1: "正常",
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}
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# =====================================================
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# 全局 RKNN 实例(单例)
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# =====================================================
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_global_rknn: RKNNLite | None = None
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def _init_rknn_model(model_path: str) -> RKNNLite:
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"""
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初始化并返回 RKNN 模型(单例模式)。
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Args:
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model_path (str): RKNN 模型路径
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Returns:
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RKNNLite: 已初始化的 RKNNLite 实例
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Raises:
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FileNotFoundError: 模型文件不存在
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RuntimeError: RKNN 加载或运行时初始化失败
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"""
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global _global_rknn
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if _global_rknn is not None:
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return _global_rknn
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if not os.path.exists(model_path):
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raise FileNotFoundError(f"RKNN 模型不存在: {model_path}")
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rknn = RKNNLite(verbose=False)
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ret = rknn.load_rknn(model_path)
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if ret != 0:
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raise RuntimeError(f"Load RKNN failed: {ret}")
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ret = rknn.init_runtime(core_mask=RKNNLite.NPU_CORE_0)
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if ret != 0:
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raise RuntimeError(f"Init runtime failed: {ret}")
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_global_rknn = rknn
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print(f"[INFO] RKNN 模型加载成功: {model_path}")
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return rknn
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# =====================================================
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# 预处理函数
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# =====================================================
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def _preprocess_input(img: np.ndarray) -> np.ndarray:
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"""
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对 ROI 图像进行模型输入预处理。
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Args:
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img (np.ndarray): BGR 格式图像,shape=(640, 640, 3)
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Returns:
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np.ndarray: NHWC 格式 float32 输入张量,shape=(1, 640, 640, 3)
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Raises:
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ValueError: 输入图像尺寸不符合要求
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"""
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if img.shape[:2] != (640, 640):
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raise ValueError("输入图像必须是 640x640")
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img_rgb = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
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input_tensor = np.expand_dims(img_rgb.astype(np.float32), axis=0)
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return np.ascontiguousarray(input_tensor)
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# =====================================================
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# ROI + RKNN 分类器
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# =====================================================
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class ROIClassifierRKNN:
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"""
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基于 RKNN 的 ROI 区域分类器。
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功能:
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- 加载 RKNN 分类模型
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- 从原始图像中裁剪 ROI
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- 执行分类推理并返回类别 ID
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"""
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def __init__(self, model_path: str) -> None:
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"""
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初始化分类器。
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||||
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||||
Args:
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model_path (str): RKNN 模型路径
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"""
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self.rknn = _init_rknn_model(model_path)
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def classify(self, img_np: np.ndarray) -> int:
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"""
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对输入图像进行 ROI 分类。
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Args:
|
||||
img_np (np.ndarray): 原始 BGR 图像
|
||||
|
||||
Returns:
|
||||
int: 分类结果(0: 异常,1: 正常)
|
||||
|
||||
Raises:
|
||||
ValueError: ROI 坐标非法
|
||||
"""
|
||||
height, width = img_np.shape[:2]
|
||||
x1, y1, x2, y2 = ROI
|
||||
|
||||
# -------- ROI 边界保护 --------
|
||||
x1 = max(0, min(x1, width - 1))
|
||||
x2 = max(0, min(x2, width))
|
||||
y1 = max(0, min(y1, height - 1))
|
||||
y2 = max(0, min(y2, height))
|
||||
|
||||
if x2 <= x1 or y2 <= y1:
|
||||
raise ValueError(f"ROI 坐标无效: {(x1, y1, x2, y2)}")
|
||||
|
||||
# -------- 1. 裁剪 ROI --------
|
||||
roi_img = img_np[y1:y2, x1:x2]
|
||||
|
||||
# -------- 2. resize 到 640×640 --------
|
||||
roi_img = cv2.resize(roi_img, (640, 640))
|
||||
|
||||
# -------- 3. 预处理 --------
|
||||
input_tensor = _preprocess_input(roi_img)
|
||||
|
||||
# -------- 4. RKNN 推理 --------
|
||||
outputs = self.rknn.inference([input_tensor])
|
||||
logits = outputs[0].reshape(-1).astype(float)
|
||||
|
||||
return int(np.argmax(logits))
|
||||
|
||||
|
||||
# =====================================================
|
||||
# 对外接口
|
||||
# =====================================================
|
||||
|
||||
_classifier = ROIClassifierRKNN(RKNN_MODEL_PATH)
|
||||
|
||||
def classify_wood_exist(img_np: np.ndarray) -> int:
|
||||
"""
|
||||
线条是否存在图像分类接口函数。
|
||||
|
||||
Args:
|
||||
img_np (np.ndarray): 原始 BGR 图像
|
||||
|
||||
Returns:
|
||||
int: 分类结果(0 / 1)
|
||||
"""
|
||||
return _classifier.classify(img_np)
|
||||
|
||||
# =====================================================
|
||||
# 测试入口
|
||||
# =====================================================
|
||||
|
||||
if __name__ == "__main__":
|
||||
img_path = "1.png"
|
||||
|
||||
if not os.path.exists(img_path):
|
||||
raise FileNotFoundError(f"图片不存在: {img_path}")
|
||||
|
||||
img = cv2.imread(img_path)
|
||||
if img is None:
|
||||
raise ValueError("图像加载失败")
|
||||
|
||||
result = classify_wood_exist(img)
|
||||
print(
|
||||
f"NG料结果:{result} "
|
||||
f"({CLASS_NAMES[result]})"
|
||||
)
|
||||
BIN
wood_exist/wood_exist_cls.rknn
Normal file
BIN
wood_exist/wood_exist_cls.rknn
Normal file
Binary file not shown.
BIN
wood_ng/1.png
Normal file
BIN
wood_ng/1.png
Normal file
Binary file not shown.
|
After Width: | Height: | Size: 394 KiB |
207
wood_ng/wood_ng.py
Normal file
207
wood_ng/wood_ng.py
Normal file
@ -0,0 +1,207 @@
|
||||
# -*- coding: utf-8 -*-
|
||||
"""
|
||||
ROI RKNN 图像分类模块
|
||||
|
||||
基于 RKNNLite 对输入图像的指定 ROI 区域进行分类,
|
||||
输出类别 ID(0: 异常,1: 正常)。
|
||||
|
||||
支持:
|
||||
- RKNN 模型单例加载
|
||||
- ROI 裁剪与缩放
|
||||
- BGR → RGB 预处理
|
||||
- 主程序测试入口
|
||||
"""
|
||||
|
||||
import os
|
||||
from typing import Dict
|
||||
|
||||
import cv2
|
||||
import numpy as np
|
||||
from rknnlite.api import RKNNLite
|
||||
|
||||
# =====================================================
|
||||
# 全局配置(常量)
|
||||
# =====================================================
|
||||
|
||||
RKNN_MODEL_PATH: str = "wood_ng_cls.rknn"
|
||||
|
||||
# ROI 坐标:x1, y1, x2, y2(像素坐标)
|
||||
ROI: tuple[int, int, int, int] = (3, 0, 694, 182)
|
||||
|
||||
CLASS_NAMES: Dict[int, str] = {
|
||||
0: "异常",
|
||||
1: "正常",
|
||||
}
|
||||
|
||||
# =====================================================
|
||||
# 全局 RKNN 实例(单例)
|
||||
# =====================================================
|
||||
|
||||
_global_rknn: RKNNLite | None = None
|
||||
|
||||
|
||||
def _init_rknn_model(model_path: str) -> RKNNLite:
|
||||
"""
|
||||
初始化并返回 RKNN 模型(单例模式)。
|
||||
|
||||
Args:
|
||||
model_path (str): RKNN 模型路径
|
||||
|
||||
Returns:
|
||||
RKNNLite: 已初始化的 RKNNLite 实例
|
||||
|
||||
Raises:
|
||||
FileNotFoundError: 模型文件不存在
|
||||
RuntimeError: RKNN 加载或运行时初始化失败
|
||||
"""
|
||||
global _global_rknn
|
||||
|
||||
if _global_rknn is not None:
|
||||
return _global_rknn
|
||||
|
||||
if not os.path.exists(model_path):
|
||||
raise FileNotFoundError(f"RKNN 模型不存在: {model_path}")
|
||||
|
||||
rknn = RKNNLite(verbose=False)
|
||||
|
||||
ret = rknn.load_rknn(model_path)
|
||||
if ret != 0:
|
||||
raise RuntimeError(f"Load RKNN failed: {ret}")
|
||||
|
||||
ret = rknn.init_runtime(core_mask=RKNNLite.NPU_CORE_0)
|
||||
if ret != 0:
|
||||
raise RuntimeError(f"Init runtime failed: {ret}")
|
||||
|
||||
_global_rknn = rknn
|
||||
print(f"[INFO] RKNN 模型加载成功: {model_path}")
|
||||
|
||||
return rknn
|
||||
|
||||
|
||||
# =====================================================
|
||||
# 预处理函数
|
||||
# =====================================================
|
||||
|
||||
def _preprocess_input(img: np.ndarray) -> np.ndarray:
|
||||
"""
|
||||
对 ROI 图像进行模型输入预处理。
|
||||
|
||||
Args:
|
||||
img (np.ndarray): BGR 格式图像,shape=(640, 640, 3)
|
||||
|
||||
Returns:
|
||||
np.ndarray: NHWC 格式 float32 输入张量,shape=(1, 640, 640, 3)
|
||||
|
||||
Raises:
|
||||
ValueError: 输入图像尺寸不符合要求
|
||||
"""
|
||||
if img.shape[:2] != (640, 640):
|
||||
raise ValueError("输入图像必须是 640x640")
|
||||
|
||||
img_rgb = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
|
||||
input_tensor = np.expand_dims(img_rgb.astype(np.float32), axis=0)
|
||||
|
||||
return np.ascontiguousarray(input_tensor)
|
||||
|
||||
|
||||
# =====================================================
|
||||
# ROI + RKNN 分类器
|
||||
# =====================================================
|
||||
|
||||
class ROIClassifierRKNN:
|
||||
"""
|
||||
基于 RKNN 的 ROI 区域分类器。
|
||||
|
||||
功能:
|
||||
- 加载 RKNN 分类模型
|
||||
- 从原始图像中裁剪 ROI
|
||||
- 执行分类推理并返回类别 ID
|
||||
"""
|
||||
|
||||
def __init__(self, model_path: str) -> None:
|
||||
"""
|
||||
初始化分类器。
|
||||
|
||||
Args:
|
||||
model_path (str): RKNN 模型路径
|
||||
"""
|
||||
self.rknn = _init_rknn_model(model_path)
|
||||
|
||||
def classify(self, img_np: np.ndarray) -> int:
|
||||
"""
|
||||
对输入图像进行 ROI 分类。
|
||||
|
||||
Args:
|
||||
img_np (np.ndarray): 原始 BGR 图像
|
||||
|
||||
Returns:
|
||||
int: 分类结果(0: 异常,1: 正常)
|
||||
|
||||
Raises:
|
||||
ValueError: ROI 坐标非法
|
||||
"""
|
||||
height, width = img_np.shape[:2]
|
||||
x1, y1, x2, y2 = ROI
|
||||
|
||||
# -------- ROI 边界保护 --------
|
||||
x1 = max(0, min(x1, width - 1))
|
||||
x2 = max(0, min(x2, width))
|
||||
y1 = max(0, min(y1, height - 1))
|
||||
y2 = max(0, min(y2, height))
|
||||
|
||||
if x2 <= x1 or y2 <= y1:
|
||||
raise ValueError(f"ROI 坐标无效: {(x1, y1, x2, y2)}")
|
||||
|
||||
# -------- 1. 裁剪 ROI --------
|
||||
roi_img = img_np[y1:y2, x1:x2]
|
||||
|
||||
# -------- 2. resize 到 640×640 --------
|
||||
roi_img = cv2.resize(roi_img, (640, 640))
|
||||
|
||||
# -------- 3. 预处理 --------
|
||||
input_tensor = _preprocess_input(roi_img)
|
||||
|
||||
# -------- 4. RKNN 推理 --------
|
||||
outputs = self.rknn.inference([input_tensor])
|
||||
logits = outputs[0].reshape(-1).astype(float)
|
||||
|
||||
return int(np.argmax(logits))
|
||||
|
||||
|
||||
# =====================================================
|
||||
# 对外接口
|
||||
# =====================================================
|
||||
|
||||
_classifier = ROIClassifierRKNN(RKNN_MODEL_PATH)
|
||||
|
||||
def classify_wood_ng(img_np: np.ndarray) -> int:
|
||||
"""
|
||||
线条是否为ng料图像分类接口函数。
|
||||
|
||||
Args:
|
||||
img_np (np.ndarray): 原始 BGR 图像
|
||||
|
||||
Returns:
|
||||
int: 分类结果(0 / 1)
|
||||
"""
|
||||
return _classifier.classify(img_np)
|
||||
|
||||
# =====================================================
|
||||
# 测试入口
|
||||
# =====================================================
|
||||
|
||||
if __name__ == "__main__":
|
||||
img_path = "1.png"
|
||||
|
||||
if not os.path.exists(img_path):
|
||||
raise FileNotFoundError(f"图片不存在: {img_path}")
|
||||
|
||||
img = cv2.imread(img_path)
|
||||
if img is None:
|
||||
raise ValueError("图像加载失败")
|
||||
|
||||
result = classify_wood_ng(img)
|
||||
print(
|
||||
f"NG料结果:{result} "
|
||||
f"({CLASS_NAMES[result]})"
|
||||
)
|
||||
BIN
wood_ng/wood_ng_cls.rknn
Normal file
BIN
wood_ng/wood_ng_cls.rknn
Normal file
Binary file not shown.
Reference in New Issue
Block a user