按照官方操作手册转换yolo11模型出现问题

報告されたログを出発点として、ultralytics 8.4.52 と Pulsar2 6.0 または 7.0 を使用した YOLO11 の公式変換を再現する。yolo11n.npu.json、特に dst_perm と transpose_postprocess の失敗を調査し、その後、生成された出力形状を MaixPy の YOLO11 ローダーの想定と比較する。モデルが手動で JSON を編集せずに変換でき、MaixPy に正常にロードできれば完了とする。

环境：
python环境：
ultralytics 8.4.52

docker环境 两个版本同样错误
pulsar2 6.0
pulsar2 7.0

报错日志：
`2026-07-31 11:22:21.482 | INFO | yamain.command.precision_analysis:quant_precision_analysis:403 - save precision analysis table to [tmp/quant/debug/precision_analysis_table.txt]
2026-07-31 11:22:21.489 | INFO | yamain.command.precision_analysis:quant_precision_analysis:411 - save precision analysis graph to [tmp/quant/debug/precision_analysis.mmd]
Building native ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 0:00:00
2026-07-31 11:22:22.667 | INFO | yamain.command.build:compile_ptq_model:1169 - group 0 compiler transformation
2026-07-31 11:22:22.676 | WARNING | yamain.command.load_model:pre_process:622 - preprocess tensor [images]
2026-07-31 11:22:22.676 | INFO | yamain.command.load_model:pre_process:624 - tensor: images, (1, 640, 640, 3), U8
2026-07-31 11:22:22.676 | INFO | yamain.command.load_model:pre_process:625 - op: op:pre_dequant_1, AxDequantizeLinear, {'const_inputs': {'x_zeropoint': array(0, dtype=int32), 'x_scale': array(1., dtype=float32)}, 'output_dtype': <class 'numpy.float32'>, 'quant_method': 0}
2026-07-31 11:22:22.676 | INFO | yamain.command.load_model:pre_process:624 - tensor: tensor:pre_norm_1, (1, 640, 640, 3), FP32
2026-07-31 11:22:22.676 | INFO | yamain.command.load_model:pre_process:625 - op: op:pre_norm_1, AxNormalize, {'dim': 3, 'mean': [0.0, 0.0, 0.0], 'std': [255.0, 255.0, 255.0], 'output_dtype': FP32}
2026-07-31 11:22:22.676 | INFO | yamain.command.load_model:pre_process:624 - tensor: tensor:pre_transpose_1, (1, 640, 640, 3), FP32
2026-07-31 11:22:22.676 | INFO | yamain.command.load_model:pre_process:625 - op: op:pre_transpose_1, AxTranspose, {'perm': [0, 3, 1, 2]}
2026-07-31 11:22:22.677 | WARNING | yamain.command.load_model:post_process:633 - postprocess tensor [/model.23/Concat_output_0]
Traceback (most recent call last):
File "", line 59, in guard_context
File "", line 1174, in compile_ptq_model
File "", line 782, in ir_compiler_transformation
File "", line 647, in post_process
File "", line 347, in transpose_postprocess
IndexError: list assignment index out of range

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "", line 4, in
File "", line 281, in
File "", line 277, in pulsar2
File "", line 158, in wrapper
File "", line 21, in wrapper
File "", line 115, in build_error
File "", line 13, in wrapper
File "", line 625, in build
File "", line 1138, in compile_ptq_model
File "/usr/local/lib/python3.12/contextlib.py", line 158, in exit
self.gen.throw(value)
File "", line 61, in guard_context
File "", line 73, in error_func
yamain.common.error.CodeException: (<ErrorCode.FrontendError: 6>, IndexError('list assignment index out of range'))`

目前解决方案：
可以通过修改yolo11n.npu.json的方式来规避报错：
"dst_perm": [0, 1, 3, 2]“ 改为 "dst_perm": [0, 1, 2]"

生成的模型可以在板端推理，使用下面命令：
ax_run_model -m xxx.axmodel -r 100

但无法使用Maixpy 推理

报错:
`start running...

-- [I] [Maix Comm Protocol] auto set pinmap A21 to UART4_TX for uart4
-- [I] [Maix Comm Protocol] auto set pinmap A22 to UART4_RX for uart4
-- [I] [Maix Comm Protocol] listening on uart port: uart4(/dev/ttyS4)
-- [I] npu_ai_isp_on from config: 0 (off)
-- [I] init middleware SYSTEM
-- [I] maix multi-media driver used count: 1
-- [I] init middleware NPU ENGINE
-- [I] maix npu driver used count: 1
-- [I] load model from: /root/my_models/yolo11n_npu.axmodel
-- [I] input_cache : 1, flush input cache to ddr before run model: 0
-- [I] output_cache: 1, invalidate output cache after run model: 1
-- [I] model info:
type: yolo11
input type: rgb
mean:0.000000 0.000000 0.000000
scale:0.003922 0.003922 0.003922
labels num: 1
input size: 96x96

-- [E] output node shape error, please check 2
-- [I] Outputs:
LayerInfo(name='/model.23/Concat_output_0', dtype=float32, shape=[1, 64, 189])
LayerInfo(name='/model.23/Concat_1_output_0', dtype=float32, shape=[1, 1, 189])
LayerInfo(name='/model.23/Concat_2_output_0', dtype=float32, shape=[1, 4, 189])
Traceback (most recent call last):
File "/tmp/maixpy_run/main.py", line 4, in
detector = nn.YOLO11(model="/root/my_models/yolo11n.mud", dual_buff=True)
RuntimeError: Invalid arguments: load model failed`