參考

https://www.toradex.cn/blog/nxp-imx8ji-yueiq-kuang-jia-ce-shi-machine-learning

IMX-MACHINE-LEARNING-UG.pdf

CPU和NPU圖像分類

cd /usr/bin/tensoRFlow-lite-2.4.0/examples

CPU運行

./label_image -m mobilenet_v1_1.0_224_quant.tflite -i grace_hopper.bmp -l labels.txt

INFO: Loaded model mobilenet_v1_1.0_224_quant.tflite

INFO: resolved reporter

INFO: invoked

INFO: averagetime:50.66ms

INFO: 0.780392: 653 military unIForm

INFO: 0.105882: 907 Windsor tie

INFO: 0.0156863: 458 bow tie

INFO: 0.0117647: 466 bulletproof vest

INFO: 0.00784314: 835 suit

GPU/NPU加速運行

./label_image -m mobilenet_v1_1.0_224_quant.tflite -i grace_hopper.bmp -l labels.txt-a 1

INFO: Loaded model mobilenet_v1_1.0_224_quant.tflite

INFO: resolved reporter

INFO: Created TensorFlow Lite delegate for NNAPI.

INFO: Applied NNAPI delegate.

INFO: invoked

INFO: average time:2.775ms

INFO: 0.768627: 653 military uniform

INFO: 0.105882: 907 Windsor tie

INFO: 0.0196078: 458 bow tie

INFO: 0.0117647: 466 bulletproof vest

INFO: 0.00784314: 835 suit

USE_GPU_INFERENCE=0./label_image -m mobilenet_v1_1.0_224_quant.tflite -i grace_hopper.bmp -l labels.txt--external_delegate_path=/usr/lib/libvx_delegate.so

Python運行

python3 label_image.py

INFO: Created TensorFlow Lite delegate for NNAPI.

Applied NNAPI delegate.

WARM-up time:6628.5ms

Inference time: 2.9 ms

0.870588: military uniform

0.031373: Windsor tie

0.011765: mortarboard

0.007843: bow tie

0.007843: bulletproof vest

基準測試CPU單核運行

./benchmark_model --graph=mobilenet_v1_1.0_224_quant.tflite

STARTING!

Log parameter values verbosely: [0]

Graph: [mobilenet_v1_1.0_224_quant.tflite]

Loaded model mobilenet_v1_1.0_224_quant.tflite

The input model file size (MB): 4.27635

Initialized session in 15.076ms.

Running benchmark for at least 1 iterations and at least 0.5 seconds but terminate if exceeding 150 seconds.

count=4 first=166743 curr=161124 min=161054 max=166743avg=162728std=2347

Running benchmark for at least 50 iterations and at least 1 seconds but terminate if exceeding 150 seconds.

count=50 first=161039 curr=161030 min=160877 max=161292 avg=161039std=94

Inference timings in us: Init: 15076, First inference: 166743, Warmup (avg):162728, Inference (avg):161039

Note: as the benchmark tool itself affects memory footprint, the following is only APPROXIMATE to the actual memory footprint of the model at runtime. Take the information at your discretion.

Peak memory footprint (MB): init=2.65234 overall=9.00391

CPU多核運行

./benchmark_model --graph=mobilenet_v1_1.0_224_quant.tflite --num_threads=4

4核--num_threads設置為4性能最好

STARTING!

Log parameter values verbosely: [0]

Num threads: [4]

Graph: [mobilenet_v1_1.0_224_quant.tflite]

#threads used for CPU inference: [4]

Loaded model mobilenet_v1_1.0_224_quant.tflite

The input model file size (MB): 4.27635

Initialized session in 2.536ms.

Running benchmark for at least 1 iterations and at least 0.5 seconds but terminate if exceeding 150 seconds.

count=11 first=48722 curr=44756 min=44597 max=49397 avg=45518.9 std=1679

Running benchmark for at least 50 iterations and at least 1 seconds but terminate if exceeding 150 seconds.

count=50 first=44678 curr=44591 min=44590 max=50798avg=44965.2std=1170

Inference timings in us: Init: 2536, First inference: 48722, Warmup (avg):45518.9, Inference (avg):44965.2

Note: as the benchmark tool itself affects memory footprint, the following is only APPROXIMATE to the actual memory footprint of the model at runtime. Take the information at your discretion.

Peak memory footprint (MB): init=1.38281 overall=8.69922

GPU/NPU加速

./benchmark_model --graph=mobilenet_v1_1.0_224_quant.tflite --num_threads=4 --use_nnapi=true

STARTING!

Log parameter values verbosely: [0]

Num threads: [4]

Graph: [mobilenet_v1_1.0_224_quant.tflite]

#threads used for CPU inference: [4]

Use NNAPI: [1]

NNAPI accelerators available: [vsi-npu]

Loaded model mobilenet_v1_1.0_224_quant.tflite

INFO: Created TensorFlow Lite delegate for NNAPI.

Explicitly applied NNAPI delegate, and the model graph will be completely executed by the delegate.

The input model file size (MB): 4.27635

Initialized session in 3.968ms.

Running benchmark for at least 1 iterations and at least 0.5 seconds but terminate if exceeding 150 seconds.

count=1 curr=6611085

Running benchmark for at least 50 iterations and at least 1 seconds but terminate if exceeding 150 seconds.

count=369 first=2715 curr=2623 min=2572 max=2776avg=2634.2std=20

Inference timings in us: Init: 3968, First inference: 6611085, Warmup (avg): 6.61108e+06, Inference (avg): 2634.2

Note: as the benchmark tool itself affects memory footprint, the following is only APPROXIMATE to the actual memory footprint of the model at runtime. Take the information at your discretion.

Peak memory footprint (MB): init=2.42188 overall=28.4062

結果對比

OpenCV DNN

cd /usr/share/OpenCV/samples/bin

./example_dnn_classification --input=dog416.png --zoo=models.yml squeezenet

下載模型

cd /usr/share/opencv4/testdata/dnn/

python3 download_models_basic.py

圖像分類

cd /usr/share/OpenCV/samples/bin

./example_dnn_classification --input=dog416.png --zoo=models.yml squeezenet

文件瀏覽器地址欄輸入

ftp://ftp.toradex.cn/Linux/i.MX8/eIQ/OpenCV/Image_Classification.zip

下載文件

解壓得到文件models.yml和squeezenet_v1.1.caffemodel

cd /usr/share/OpenCV/samples/bin

將文件導入到開發(fā)板的/usr/share/OpenCV/samples/bin目錄下

$cp/usr/share/opencv4/testdata/dnn/dog416.png /usr/share/OpenCV/samples/bin/
$cp/usr/share/opencv4/testdata/dnn/squeezenet_v1.1.prototxt /usr/share/OpenCV/samples/bin/
$cp/usr/share/OpenCV/samples/data/dnn/classification_classes_ILSVRC2012.txt /usr/share/OpenCV/samples/bin/
$ cd /usr/share/OpenCV/samples/bin/

圖片輸入

./example_dnn_classification --input=dog416.png --zoo=models.yml squeezenet

報錯

root@myd-jx8mp:/usr/share/OpenCV/samples/bin# ./example_dnn_classification --input=dog416.png --zoo=model.yml squeezenet

ERRORS:

Missing parameter: 'mean'

Missing parameter: 'rgb'

加入參數--rgb 和 --mean=1

還是報錯加入參數--mode

root@myd-jx8mp:/usr/share/OpenCV/samples/bin# ./example_dnn_classification --rgb --mean=1 --input=dog416.png --zoo=models.yml squeezenet

[WARN:0]global/usr/src/debug/opencv/4.4.0.imx-r0/git/modules/videoio/src/cap_gstreamer.cpp (898) open OpenCV | GStreamer warning: unable to query duration of stream

[WARN:0]global/usr/src/debug/opencv/4.4.0.imx-r0/git/modules/videoio/src/cap_gstreamer.cpp (935) open OpenCV | GStreamer warning: Cannot query video position: status=1, value=0, duration=-1

root@myd-jx8mp:/usr/share/OpenCV/samples/bin#./example_dnn_classification --rgb --mean=1 --input=dog416.png --zoo=models.yml squeezenet --mode

[WARN:0]global/usr/src/debug/opencv/4.4.0.imx-r0/git/modules/videoio/src/cap_gstreamer.cpp (898) open OpenCV | GStreamer warning: unable to query duration of stream

[WARN:0]global/usr/src/debug/opencv/4.4.0.imx-r0/git/modules/videoio/src/cap_gstreamer.cpp (935) open OpenCV | GStreamer warning: Cannot query video position: status=1, value=0, duration=-1

視頻輸入

./example_dnn_classification --device=2 --zoo=models.yml squeezenet

問題

如果testdata目錄下沒有文件,則查找下

lhj@DESKTOP-BINN7F8:~/myd-jx8mp-yocto$ find . -name "dog416.png"

./build-xwayland/tmp/work/cortexa53-crypto-mx8mp-poky-linux/opencv/4.4.0.imx-r0/extra/testdata/dnn/dog416.png

再將相應的文件復制到開發(fā)板

cd./build-xwayland/tmp/work/cortexa53-crypto-mx8mp-poky-linux/opencv/4.4.0.imx-r0/extra/testdata/

tar -cvf /mnt/e/dnn.tar ./dnn/

cd/usr/share/opencv4/testdata目錄不存在則先創(chuàng)建

rz導入dnn.tar

解壓tar -xvf dnn.tar

terminate calLEDafter throwing an instance of 'cv::Exception'

what():OpenCV(4.4.0)/usr/src/debug/opencv/4.4.0.imx-r0/git/samples/dnn/classification.cpperrorAssertion failed) !model.empty() in function 'main'

Aborted

lhj@DESKTOP-BINN7F8:~/myd-jx8mp-yocto/build-xwayland$ find . -name classification.cpp

lhj@DESKTOP-BINN7F8:~/myd-jx8mp-yocto/build-xwayland$ cp ./tmp/work/cortexa53-crypto-mx8mp-poky-linux/opencv/4.4.0.imx-r0/packages-split/opencv-src/usr/src/debug/opencv/4.4.0.imx-r0/git/samples/dnn/classification.cpp /mnt/e

lhj@DESKTOP-BINN7F8:~/myd-jx8mp-yocto/build-xwayland$

YOLO對象檢測

cd /usr/share/OpenCV/samples/bin

./example_dnn_object_detection --width=1024 --height=1024 --scale=0.00392 --input=dog416.png --rgb --zoo=models.yml yolo

https://pjreddie.com/darknet/yolo/下載cfg和weights文件

cd/usr/share/OpenCV/samples/bin/

導入上面下載的文件

cp/usr/share/OpenCV/samples/data/dnn/object_detection_classes_yolov3.txt/usr/share/OpenCV/samples/bin/

cp/usr/share/opencv4/testdata/dnn/yolov3.cfg/usr/share/OpenCV/samples/bin/./example_dnn_object_detection --width=1024 --height=1024 --scale=0.00392 --input=dog416.png --rgb --zoo=models.yml yolo

OpenCV經典機器學

cd /usr/share/OpenCV/samples/bin

線性SVM

./example_tutorial_introduction_to_svm

非線性SVM

./example_tutorial_non_linear_svms

PCA分析

./example_tutorial_introduction_to_pca ../data/pca_test1.jpg

邏輯回歸

./example_cpp_logistic_regression