100 lines
3.2 KiB
Python
100 lines
3.2 KiB
Python
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import cv2
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import numpy as np
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import platform
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from rknnlite.api import RKNNLite
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# ------------------- 全局变量 -------------------
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_global_rknn_instance = None
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labels = {0: '无线条', 1: '有线条'}
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# ROI: x, y, w, h
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ROI = (3,0,694,182)
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DEVICE_COMPATIBLE_NODE = '/proc/device-tree/compatible'
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# ------------------- 主机信息 -------------------
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def get_host():
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system = platform.system()
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machine = platform.machine()
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os_machine = system + '-' + machine
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if os_machine == 'Linux-aarch64':
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try:
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with open(DEVICE_COMPATIBLE_NODE) as f:
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device_compatible_str = f.read()
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if 'rk3562' in device_compatible_str:
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host = 'RK3562'
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elif 'rk3576' in device_compatible_str:
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host = 'RK3576'
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elif 'rk3588' in device_compatible_str:
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host = 'RK3588'
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else:
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host = 'RK3566_RK3568'
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except IOError:
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print('Read device node {} failed.'.format(DEVICE_COMPATIBLE_NODE))
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exit(-1)
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else:
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host = os_machine
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return host
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# ------------------- RKNN 模型初始化（只加载一次） -------------------
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def init_rknn_model(model_path):
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global _global_rknn_instance
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if _global_rknn_instance is None:
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rknn_lite = RKNNLite(verbose=False)
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ret = rknn_lite.load_rknn(model_path)
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if ret != 0:
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raise RuntimeError(f'Load model failed: {ret}')
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ret = rknn_lite.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_instance = rknn_lite
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print(f'[INFO] RKNN model loaded: {model_path}')
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return _global_rknn_instance
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# ------------------- 图像预处理 + ROI 裁剪 -------------------
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def preprocess(raw_image, target_size=(640, 640)):
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"""
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ROI 裁剪 + resize + batch 维度
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"""
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global ROI
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x, y, w, h = ROI
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roi_img = raw_image[y:y+h, x:x+w]
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img_resized = cv2.resize(roi_img, target_size)
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img_batch = np.expand_dims(img_resized, 0) # 添加 batch 维度
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return img_batch
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# ------------------- 推理函数 -------------------
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def xiantiao_cls_inference_once(rknn, raw_image, target_size=(640, 640)):
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"""
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使用已加载的 rknn 实例进行推理
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返回: (class_id, boolean)
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"""
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img = preprocess(raw_image, target_size)
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outputs = rknn.inference([img])
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output = outputs[0].reshape(-1)
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class_id = int(np.argmax(output))
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bool_value = class_id == 1
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return class_id, bool_value
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# ------------------- 测试 -------------------
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if __name__ == '__main__':
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image_path = "./test_image/class1/2.jpg"
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model_path = "xiantiao_rk3588.rknn"
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bgr_image = cv2.imread(image_path)
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if bgr_image is None:
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raise RuntimeError(f"Failed to read image: {image_path}")
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rgb_image = cv2.cvtColor(bgr_image, cv2.COLOR_BGR2RGB)
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# 只初始化一次模型
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rknn_model = init_rknn_model(model_path)
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# 多次调用都用同一个 rknn_model
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class_id, bool_value = xiantiao_cls_inference_once(rknn_model, rgb_image)
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print(f"类别ID: {class_id}, 布尔值: {bool_value}")
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