fix: YOLO TensorRT 输出解析修复

- TensorRT 输出 shape: (1, 84, 4725)  (84, 4725)
- 正确解析 YOLO 输出格式: boxes[0:4], obj_conf[4], cls_scores[5:]
- 移除错误的 detection 遍历逻辑
- 工业级向量化操作代替 Python 循环

debug_output_shape.py

@@ -0,0 +1,69 @@
+"""调试 TensorRT 输出 shape"""
+import sys
+import os
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+import numpy as np
+
+try:
+    import tensorrt as trt
+    import pycuda.driver as cuda
+    import pycuda.autoinit
+    
+    engine_path = "./models/yolo11n.engine"
+    
+    with open(engine_path, "rb") as f:
+        runtime = trt.Runtime(trt.Logger(trt.Logger.WARNING))
+        engine = runtime.deserialize_cuda_engine(f.read())
+    
+    context = engine.create_execution_context()
+    
+    input_shape = (1, 3, 480, 480)
+    input_data = np.random.randn(*input_shape).astype(np.float32)
+    
+    input_binding_idx = 0
+    output_binding_idx = 1
+    
+    output_shape = engine.get_binding_shape(output_binding_idx)
+    print(f"Engine 定义 output shape: {output_shape}")
+    
+    context.set_input_shape(engine.get_binding_name(0), input_shape)
+    
+    output_size = int(np.prod([max(1, s) for s in output_shape]))
+    
+    h_input = cuda.pagelocked_empty(input_data.size, np.float32)
+    h_output = cuda.pagelocked_empty(output_size, np.float32)
+    
+    np.copyto(h_input, input_data.ravel())
+    
+    d_input = cuda.mem_alloc(h_input.nbytes)
+    d_output = cuda.mem_alloc(h_output.nbytes)
+    
+    bindings = [int(d_input), int(d_output)]
+    
+    cuda.memcpy_htod(d_input, h_input)
+    context.execute_v2(bindings=bindings)
+    cuda.memcpy_dtoh(h_output, d_output)
+    
+    output_array = h_output.reshape(output_shape)
+    
+    print(f"\n实际输出:")
+    print(f"  dtype: {output_array.dtype}")
+    print(f"  shape: {output_array.shape}")
+    print(f"  ndim: {output_array.ndim}")
+    
+    if output_array.ndim == 1:
+        print(f"  total elements: {output_array.shape[0]}")
+        print(f"  expected (84*4725): {84 * 4725}")
+    elif output_array.ndim == 2:
+        print(f"  shape[0]: {output_array.shape[0]} (detections)")
+        print(f"  shape[1]: {output_array.shape[1]} (features)")
+    elif output_array.ndim == 3:
+        print(f"  shape[0]: {output_array.shape[0]} (batch)")
+        print(f"  shape[1]: {output_array.shape[1]} (classes+coords)")
+        print(f"  shape[2]: {output_array.shape[2]} (num_boxes)")
+    
+except Exception as e:
+    print(f"Error: {e}")
+    import traceback
+    traceback.print_exc()