topic Re: how to convert vsdk::Mat to cv::Mat? in S32 Design Studio

how to convert vsdk::Mat to cv::Mat?

justforfunl — Wed, 28 Mar 2018 13:02:45 GMT

I am using SDK to Get the Camera Capture, but My Application is written by OpenCV, I need to deal with the cv::Mat data , but I don't know how to do this.

Re: how to convert vsdk::Mat to cv::Mat?

jiri_kral — Wed, 28 Mar 2018 13:32:31 GMT

Hi,

for more info you can look at VisionSDK_UMat.pdf file. File is located [S32DS_VISION_INSTALL_PATH]\S32DS\s32v234_sdk\docs\vsdk\

I think that also GDI_Mat class can handle cv::Mat data.

Jiri

Re: how to convert vsdk::Mat to cv::Mat?

justforfunl — Thu, 29 Mar 2018 05:19:11 GMT

I test the following codes.

vsdk::Mat frame_map = lFrame.mUMat.getMat(vsdk::ACCESS_READ | OAL_USAGE_CACHED);

printf("channel is d%",frame_map.channels());

printf("rows is d%",frame_map.rows);

printf("cols is d%",frame_map.cols);

printf("depth is d%",frame_map.depth());

printf("elemSize is d%",frame_map.elemSize());

printf("elemSize1 is d%",frame_map.elemSize1());

printf("total is d%",frame_map.total());

printf("type is d%",frame_map.type());

result is:

channel is 2

rows is 960

cols is 1280

depth is 0

elemSize is 2

elemSize1 is 1

total is 1228800

type is 8

what’s meaning of “channel is 2”

OpenCV Error: Assertion failed (image.channels() == 1 || image.channels() == 3 || image.channels() == 4) in imwrite_, file /home/b45336/git/vsdk/opencv_src/modules/imgcodecs/src/loadsave.cpp, line 455

../src/sdi.cpp:1548/SeqEventHandler : [Note]: Grabber got Sequencer event number 4098.

Frame done message arrived #3.

../src/sdi.cpp:1566/SeqEventHandler : [Note]: Frame done.

terminate called after throwing an instance of 'cv::Exception'

what(): /home/b45336/git/vsdk/opencv_src/modules/imgcodecs/src/loadsave.cpp:455: error: (-215) image.channels() == 1 || image.channels() == 3 || image.channels() == 4 in function imwrite_

Aborted

Thanks,

Re: how to convert vsdk::Mat to cv::Mat?

jiri_kral — Thu, 29 Mar 2018 12:26:09 GMT

Hi,

it is possible share your project? If you can't share it on community, you can send it to my email address.

Jiri

Re: how to convert vsdk::Mat to cv::Mat?

justforfunl — Fri, 30 Mar 2018 01:08:54 GMT

Dear Jiri Kral, Thanks for your help. I find the error that is confused to understand the image format, I try to use the UYVY format data " = " CV_16UC1 format data. so It's error.