- 微信
- 微博
  
  分享文章到微博
- 复制链接
  
  复制链接到剪贴板

张小白带你玩转Atlas 200DK+CANN 5.0.4+MindStudio 3.0.4（17）玩转摄像头

张辉发表于 2022/04/27 04:23:35 2022/04/27

【摘要】 Atlas 200DK+CANN 5.0.4+MindStudio 3.0.4

十七、在Atlas 200DK上玩转摄像头

200DK有两个摄像头的接口，早在两年前，张小白就在早期CANN版本中试过摄像头（ https://bbs.huaweicloud.com/blogs/194291 ），当然也要注意里面的坑，比如说接口中排线的方向等等。

我们下面看看，在CANN 5.0.4 alpha005的版本对摄像头的支持如何：

1、在200DK上执行ascend camera例程

根据：https://gitee.com/ascend/samples/tree/v0.6.0/cplusplus/level1_single_api/5_200dk_peripheral/ascendcamera

cd samples/cplusplus/level1_single_api/5_200dk_peripheral/ascendcamera

mkdir -p build/intermediates/host

cd build/intermediates/host

cmake ../../../src -DCMAKE_CXX_COMPILER=aarch64-linux-gnu-g++ -DCMAKE_SKIP_RPATH=TRUE

make

cd $HOME/samples/cplusplus/level1_single_api/5_200dk_peripheral/ascendcamera/out

mkdir output

摄像头1：

./main -i -c 1 -o ./output/filename.jpg --overwrite

摄像头0：

./main -i -c 0 -o ./output/filename0.jpg --overwrite

从宿主机将结果文件拷贝回来：

mkdir camera

cd camera

scp HwHiAiUser@192.168.1.2:~/samples/cplusplus/level1_single_api/5_200dk_peripheral/ascendcamera/out/output/*.jpg .

打开看看：

说明这两个摄像头拍照都没（太大的）问题。(尽管这个带夜视的廉价摄像头是一如既往的发红。。）

2、在200DK上执行face_detection_camera例程

根据 https://gitee.com/ascend/samples/tree/v0.6.0/cplusplus/level2_simple_inference/2_object_detection/face_detection_camera

执行以下脚本下载caffe模型，并转换为om模型：

cd ${HOME}/samples/cplusplus/level2_simple_inference/2_object_detection/face_detection_camera/model
wget https://modelzoo-train-atc.obs.cn-north-4.myhuaweicloud.com/003_Atc_Models/AE/ATC%20Model/facedection/face_detection_fp32.caffemodel
wget https://modelzoo-train-atc.obs.cn-north-4.myhuaweicloud.com/003_Atc_Models/AE/ATC%20Model/facedection/face_detection.prototxt
wget https://c7xcode.obs.cn-north-4.myhuaweicloud.com/models/face_detection_camera/insert_op.cfg

atc --output_type=FP32 --input_shape="data:1,3,300,300" --weight=./face_detection_fp32.caffemodel --input_format=NCHW --output=./face_detection --soc_version=Ascend310 --insert_op_conf=./insert_op.cfg --framework=0 --save_original_model=false --model=./face_detection.prototxt

编译：

cd ~/samples/cplusplus/level2_simple_inference/2_object_detection/face_detection_camera/scripts

bash ./sample_build.sh

运行：

bash sample_run.sh

具体报错如下：

HwHiAiUser@davinci-mini:~/samples/cplusplus/level2_simple_inference/2_object_detection/face_detection_camera/scripts$ bash sample_run.sh
[INFO] The sample starts to run
Current environment valid ip list:
	127.0.0.1
	192.168.199.204
Please choose one to show the presenter in browser:192.168.199.204
[INFO]  Acl init ok
[INFO]  Open device 0 ok
[INFO]  Use default context currently
content_type config string:1
[INFO]  dvpp init resource ok
[INFO]  Load model ../model/face_detection.om success
[INFO]  Create model description success
[INFO]  Create model(../model/face_detection.om) output success
[INFO]  Init model ../model/face_detection.om success
[INFO]  No specified carmera id, use camera0
[ERROR]  Set camera fps failed
[ERROR]  Set camera0 property failed
[ERROR]  Open camera failed
[2022-04-23 18:24:44][LIBMEDIA_ERROR] CloseCamera failed!!! Camera[0] is not opened
[ERROR]  Close camera 0 failed
[INFO]  Unload model ../model/face_detection.om success
[INFO]  destroy context ok
[INFO]  Reset device 0 ok
[INFO]  Finalize acl ok
[INFO] The program runs successfully, Please visit http://192.168.199.204:7007 for display server!
Enter any command to stop the application:
 kill existing project process: kill -9 3147.
/home/HwHiAiUser/Ascend/thirdpart/aarch64/common/sample_common.sh: line 40: kill: (3147) - No such process
ERROR: kill project process failed.

经过专家指点，是目前摄像头相关底层代码的fps设置有误：