topic Re: imx8: Opencv, Live camera object detection in i.MX Processors

imx8: Opencv, Live camera object detection

vsuneja63 — Tue, 26 May 2020 14:36:02 GMT

Hi,

Is there tested sample code available for live camera object detection with OpenCV for imx8mqevk target.

Thanks & regards,

Vipul Kumar

Re: imx8: Opencv, Live camera object detection

Bio_TICFSL — Wed, 27 May 2020 15:03:03 GMT

Hello Vipul,

You can use the Opencv with you MX8MQEVK, even with camera please check the Linux BSP documentation in the User guide chapter 12 eIQ machine learning for i.MX toolkit provides a set of libraries and development tools for machine learning applications targeting NXP microcontrollers and application processors. The toolkit is contained in the meta-fsl-bsp-release/imx/meta-ml layer. It describe how to run OpenCV, Arm Compute Library, Tensorflow, TensorFlow Lite, Arm NN, and ONNX demos on i.MX Linux BSPs.

Regards

Re: imx8: Opencv, Live camera object detection

vsuneja63 — Thu, 28 May 2020 12:15:24 GMT

Hi,

Thanks for reply!

I have compiled eIQ OpenCV object detection cpp example. Facing run time error:

[ 368.794291] mx6s-csi 30a90000.csi1_bridge: CSI dev coherent is 1
[ 368.800620] mx6s-csi 30b80000.csi2_bridge: CSI dev coherent is 1
[ 368.825304] mx6s-csi 30a90000.csi1_bridge: CSI dev coherent is 1

(ObjectRecognitionCPP:4394): GStreamer-CRITICAL **: 09:55:24.973: gst_element_get_state: assertion 'GST_IS_ELEMENT (element)' failed
Video fps: 1.00777
terminate called after throwing a[ 369.881174] audit: type=1701 audit(1583488526.012:5): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=System pid=4394 comm="ObjectRecogniti" exe="/home/test/eiq_sample_apps/examples-opencv/obj_recognition_cpp/src/ObjectRecognitionCPP" sig=6 res=1
n instance of 'cv::Exception'
what(): OpenCV(4.0.1) /home/vipulkumar/platform/AGL_Master/build/tmp/work/aarch64-agl-linux/opencv/4.0.1.imx+gitAUTOINC+c3d56b9aea_2522124473_32e315a5b1_34e4206aef_fccf7cd6a4_d29d003e00-r0/git/modules/imgproc/src/resize.cpp:3784: error: (-215:Assertion failed) !ssize.empty() in function 'resize'

Aborted (core dumped)

is there any dependency package which I missed? Looking forward for your response.

Re: imx8: Opencv, Live camera object detection

Bio_TICFSL — Thu, 28 May 2020 13:59:56 GMT

Hi,

I think because your camera device input not in there. Just try in terminal ls /dev. There is a video0 or video1 etc. Use your option.

Regards

Re: imx8: Opencv, Live camera object detection

vsuneja63 — Thu, 28 May 2020 15:06:26 GMT

Hi,

Thanks for reply!

I could access camera through gstreamer command :

gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480 ! waylandsink

l could see both video0 & video1 with full permissions also, no issue on the devices. Its showing some issue with resize function.

Thanks & Regards,

Vipul Kumar

Re: imx8: Opencv, Live camera object detection

vsuneja63 — Thu, 28 May 2020 15:16:52 GMT

Seems like issue is with the dimension.